Monday, May 12, 2014

Tips from "Understanding Exposure" by Bryan Peterson

I read the book "Understanding Exposure" by Bryan Peterson. By far, one of the best books that I've ever read, this book clearly and concisely explains the concept of digital photography. It is replete with samples that helps in better understanding the complicated setup and maths that goes behind a creatively expressed photograph.

I took some notes from the book and hope this is useful for some of the upcoming photographers out there :-) Do let me know if this did help.

Overall Summary


  1. Set to Manual mode and shoot pics. Always shoot in raw.
  2. For general landscape, try f/11 or f/16 with shutter at 1/ISO - normally 1/100s.
  3. Keep aperture fixed, Vary ISO and record Shutter speed. Now repeat with shutter speed fixed and varying ISO and aperture. Try default whitebalance as cloudy for outdoor and fix at home - always shoot raw.
  4. Try WB setting of cloudy for most pics - even in sunny days. Alternately try Incandescent / Tungsten in evening / early morning to get a blue effect. (Shoot in RAW)
  5. Choose a stationary object. set to widest open and keep stepping down. Note down details and see which one results in best exposure. Repeat for waterfall / sea and repeat for child on swing.
  6. Apertures: f/16, f/22 & f/32 - story telling; f/2.3, f/4 & f/5.6 - isoltation exposures
  7. Shutter speed: 1/250s, 1/500s & 1/1000s - freeze action ; 1/60s, 1/30s & 1/15s - panning; 1/4s, 1/2s & 1s - imply motion
  8. Wide angle for apsc is 12-18 mm.
  9. Best time to shoot: 1 hr after sunrise, 1 or 2 hrs before sunset
  10. overcast sky is good to shoot potraits, flowers, etc and landscapes need special attention
  11. Always use matrix metering mode
  12. shoot twice - once at correct exposure and once at 2/3rd underexposed - oftentimes, the latter looks better


Story telling - short cut
18mm, f/22 and adjust shutter speed or use aperture priority mode

Rules of thumb


  • Sunny days - brother blue sky. Take measurement off the blue sky and then take the picture.
  • Backlit scenes (shooting backlit objects) - brother backlit sky (reading of sky to left/right of sun)
  • Landscapes / buildings at dusk - brother dusky sky (sky after sun has set but still warm in color)
  • Lake / river or shiny surface - brother reflecting sky (take the reading of the reflected surface - like reflecting water)
  • When shooting green landscapes - Mr Green Jeans (reading off the greens in the scene) and -2/3 exposure

Filters

Polarizing filter - can use to cut harsh light / glare- esp midday; also useful during sunset and sunrise when shooting towards the bright light
Neutral density filter - sole purpose to reduce the intensity of the light. Generally by 3 stops.


  1. Graduated ND filter is a bit harder - same effect with multiple exposure and then merging them
  2. Multi exposure is for patterns and for implying motion. Learn how to use multiple exposures on Nikon.
  3. Photomatix has best HRD capabilities - dowload? (www.hdrsoft.com)
  4. Flash - Nikon SB-900
  5. What is TTL mode in flash? (through the lens)

Action items


  • Try the different exposure approaches using the sky brothers rules of thumb.
  • Try HDR photography - download pirated software
  • Buy polarier and ND/graduated ND filter combo - if magenta added - that's great
  • Finally, look for a wide angle lens

Sunday, August 26, 2012

Quotes from The Difficulty of Being Good by Gurcharan Das


Some of the best quotes from the book, 'The Difficulty of Being Good. On the subtle art of Dharma' by Gurcharan Das.

Hinduism is not a 'religion' in the usual sense. It is a civilization based on a simple metaphysical insight about the unity of the individual and the universe and has self-development as its objective. It employs innovative mental experiments of yoga that evolved in the first half of millennium BC, and does not have the notion of a 'chosen people', of a jealous God; it does not proselytize, does not hunt heretics. (p xxxvi)

In this cauldron fashioned from delusion, with the sun as fire and day and night as kindling wood, the months and seasons as the ladle for stirring, Time (or Death) cooks all beings: this is the simple truth. (p xliii)

The Mahabharata is suspicious of ideology. It rejects the idealistic, pacifist position of Yudhishtira as well as Duryodhana's amoral view. Its own position veers towards the pragmatic evolutionary principle of reciprocal altruism: adopt a friendly face to the world but do not allow yourself to be exploited. (p xlvii)

To save the family, abandon an individual. To save the village, abandon a family; to save the country, abandon a village. To save the soul, abandon the earth. (Vidura neeti, p6)

The Mahabharata sees a vice behind every virtue, a snake behind every horse, and a doomsday behind every victory, an uncompleted ritual behind every completed sacrifice. (p10)

Duryodhana's philosophy: A smart person pursues power and uses it to exact as much as possible from the weak. If he does not do that he leaves himself vulnerable to attack from an enemy. (p14)

It is thus possible for the envier to want something but without wishing the envied to lies it at the same time. This positive sort of envy .. that leads to emulate the successful, but without the malicious desire to deprive the rival of the possession. This is called 'benign' or 'emulative' envy and it is the one on display where one says to a friend, 'I envy you for such and such skill'. One obviously does not want to deprive the friend of the talent or the skill. Nor is one filled with ain in the case of benign envy. (p 18)

Envy is thus a great leveller, and it levels downwards. Instead of motivating one to better performance, .. envy prefers to see the other person fall. The envious person is willing to see both sides lose. 'Envy is collectively disadvantageous; the individual who envies another is prepared to do things that make them both worse off, if only the discrepancy between this sufficiently reduced,' says John Rawls. (p26)

By creating equality socialism was supposed to eliminate human envy. But the opposite happened. Oddly enough, as levelling increases in society, it actually increases envy. The Soviet Union was pervaded with envy because tiny differences, such as a new tablecloth, got exaggerated in neighbours' eyes. If greed is the vice of capitalism, envy is the flaw of socialism. (p29)

The Mahabharata does not think envy is a sin. It is just 'poor mental hygiene'. It makes Duryodhana pale and sickly and shrivels his heart. (p32)

Draupadi's insistent ('What is dharma of the king'?) question also raises the issue about who has authority to decide about dharma. It is curious that no one in the Hastinapura assembly that day appealed to God to decode who is right and who is wrong. This is because God is not expected to be an authority on dharma among Hindus, Buddhists or Jains. Human reason and the 'search for a rational basis of dharma is often compatible with these religious traditions'. But if God is not an authority then who is? Who is responsible for dharma? In his influential law book, Manu cited plural authorities for dharma two thousand years ago: "The root of dharma is the entire Veda, the tradition and customs of those who know the Vedas, the conduct of virtuous people, and what is satisfactory to oneself." (p46)

The epic also wonders if the wise can be relied upon to be authorities on dharma: 'intelligence appears differently in different men. They all take delight in their own different understanding of things'. (p48)

Draupadi's question also brought home to me the immorality of silence. Vidura accuses the nobles, kings and the wise elders - all the less-then-mad Kauravas, who stood silently as Draupadi is dragged by her hair before their eyes. When honest persons fail in their duty to speak up, the 'wound' dharma, and they ought to be punished, says the Kashyapa. (p59)

Yudhistira's answer to Draupadi (Q: 'Why be good', A: 'I do not act for sake of dharma. I act because I must') implies that consequences or ends do not justify the means. Although the Pandavas have a perfectly legitimate end in regaining their stolen kingdom, they must recover it only by honest means, without compromising dharma. (p69)

The great divide in ethical thinking is between those who judge an act based on its consequences versus those who judge it based on duty or some rule. (p73)

The Mahabharata reminds us that it is natural and desirable for human beings to want happiness and pleasure as they seek to be good. Kama is one of the legitimate goals of human life. The Christian denial of physical pleasure, especially sexual pleasure, is happily absent from the epic and most ancient Indian texts. So is the 'thou shalt not' approach, which makes one feel guilty, and turns one off the moral project. The notion of dharma as it emerges from the Mahabharata is a plural one. Being plural makes greater demands on one's reason, for human objectives sometimes conflict with each other, and this forces one to choose. (p87)

'War has no limits to violence.. [The reason is that] each of the adversaries forces the hand of the other, and this results in continuous escalation, in which neither side is guilty even if it acts first, since every act can be called pre-emptive' - Karl von Clausewitz (p92)

When an individual acts for the sake of his work rather than for the personal reward from it, Krishna says, the individual is likely to do the right thing. This moral insight is famously called nishkama karma or nishphala karma.. literally, 'disinterested action' or an action performed without thinking of its fruit. (p95)

Be intent on the action
not on the fruits of action. (Book II)
Krishna does not define what the right action is. Any action performed in a selfless spirit is superior. (p95)

Towards the end of the Gita, Krishna makes an extraordinary proposition to Arjuna. He says that now that Arjuna has learned about the truth, he should think about it and do what he thinks fit. 'Act as you choose' - these are remarkable words from the mouth of God! (p99)

The Mahabharata calls its war a dharma-yuddha, a 'just war'. The epic's language is full of words of moral judgement - aggression, self-defence, appeasement, cruelty, atrocity, and massacre. It is profoundly aware that a just war can be fought unjustly, just as an unjust war can be fought in strict accordance with the rules. (p108)

Perform actions, firm in discipline,
relinquishing attachment;
be impartial to failure and success -
this equanimity is called yoga. (p119)

'Your work will succeed as long as you don't care who gets the credit'. - Harry Truman (p127)

'It was my big fat ego that was making me want to be more important than others. What was often an exciting job became 'work' and an unsatisfactory life.' - Iris Murdoch (p128)

Difference between rational self-interest and selfishness: One should not make the common mistake in believing that the opposite of selflessness is selfishness. There is a liberal middle ground of 'self-interest', which drives ordinary human beings. This is what successful liberal institutions depend upon. (p139)

About Krishna: ' a cynic, who preaches the highest morality and stoops to practice the lowest tricks.. An opportunist who teaches a god fearing man to tell a lie, the only lie he told in all this life! [He is a[ charlatan who.. advises a hesitating archer to strike down a foe who is defenceless and crying for mercy.' - V S Suktankar (p190)

.. on my dharma journey when one begins to see the 'other' as a human being with empathy, as someone like oneself,  that is the moment when the moral sentiment is born in the human heart. (p191)

(Uttanka hasn't heard about the Kurukshetra war and when Krishna tells him, he's angry that a God like Krishna couldn't prevent it. Krishna says he was helpless and couldn't stop the war. Moreover once he is in the form of human, he has to operate within the its confines. Uttanka is still angry that Kirshna did not prevent the massacre)
Uttanka's innocent question reminded me of the classic 'problem of evil' in Christian theology: how can God, who is supposed to be perfect, allow evil to exist? Epicurus, one of the first to raise this question, asks: 'Either God wants to abolish evil, and cannot; or he can, but does not want to.. If he wants to, but cannot, he is impotent. If he can, but does not want to, he is wicked.. If, as they say, God can abolish evil, and God really wants to do it, why is there evil in the world?' (p208)

(Krishna's claim of helplessness to prevent the war) seems to be suggesting that all of life is subject to the law of karma. A person is free to act, but once the deed is done, no one can stop its relentless consequences. Even God cannot interfere. The law of karma is relentless and it trumps even God. 'The Hindu conception of God does not include the attribute of omnipotence, and this is in striking contrast to Judeo-Christian theology. (p208)

Karma has its optimistic side in a human being's ability to act with freedom, and be responsible for this act. Its pessimistic side is a feeling that we cannot escape from our past. (p209)

Yudhisthira also expresses remorse and repents. The irony is that many Indians have a low opinion of him. 'Dharmaputra Yudhisthira' is a derogatory epithet.. While Arjuna is brave and valiant warrior, remorseful Yudhisthira is considered weak and indecisive. The contempt for Yudhisthira tells us something about our contemporary society. What we need is more remorse, not less, but it is somehow considered unmanly in most society. (p253)

When Yudhisthira rejects the kshatriya tradition of dharma, he teaches us to question society's values rather than lead an unquestioning life. (p281)

What is Mahabharatha?
The epic is a 'series of precisely stated problems imprecisely and therefore inconclusively resolved, with every resolution raising new problems, until the very end, when the question remains: whose heaven and whose hell?' (p 294)

Nasadiya temper
The tentativeness of the Mahabharata's dharma reflects a sceptical streak both in the epic and in the Indian tradition. It goes back .. to Rig Veda, and it may well have originated in the charming humility of its 'Nasadiya' verse, which mediates on the creation of the universe.
"There was neither non-existence nor existence then.. There was neither death nor immortality then. There was no distinguishing sign of night nor day.. Who really knows?.. The gods came afterwards, with the creation of this universe. Who then knows whence it has arisen? Whence this creation has arisen - perhaps it formed itself, or perhaps it did not - the one who looks down on it, in the highest heaven, only he knows - or perhaps he does not know."
This verse ends with a doubt if even gods know how the universe was born. This questioning attitude is quite unlike the mindset of the Christian, Jewish or Islamic traditions which proclaim an omniscient and omnipotent God. (p 299)

What's significant about the Mahabharatha?
The epic's tentative world of moral haziness is closer to our experience as ordinary human beings in contrast to certainty of the fundamentalist. Its dizzying plural perspectives are a nice antidote to narrow and rigid positions that surround us amidst the hypertrophied rhetoric of the early twenty-first century. (p 303)

Friday, November 25, 2011

Arranged Marriage Blues 6 - Three Years of Marriage


It feels just like yesterday that we started the search for a bride and here we are - celebrating our third wedding anniversay already! Banal it may sound but, time just seems to fly!

After marriage, the pressure of new job, adjusting a new life style and shifting into a new house just took a grand toll on my blog. Hope I can get back to it with a bit more focus now. Thought of just summarizing some interesting stuff learnt hard through experience.

What does it feel to be married for 3 years? Well, the answer is - Super! You always have a friend waiting for you at home, a confidante with whom you can share your innermost feelings (mostly!) and someone to share your dinner with. Eating alone now feels like a punishment!

So for people out there - here's what you learn after marrige. Take with a big ounce of salt. And the disclaimer - this is in no way related to anything that I've experienced. It is a figment of pure imagination and totally fictional stuff!

First Year
In the first year, the first 2-3 months goes off in eating. You need to visit the innumerable relatives and relatives of relatives. Each of them will invite for lunch/dinner and you're supposed to looking fit and trim and then eat until the host feels happy. Your intake capacity is of nobody's concern.

The lunch/dinner eats away the weekends. Not much of time is left for you and your better half to communicate. This is the good thing. Since you don't have enough *quality time* to spend with each other, the actual quality of time spent is very high.

Over a few months, the invitation dwindles. People forget that you're newly married and leave you alone. At this stage, you pull out all the gift coupons and gift cards to buy stuff before the coupons expire. The visit will be mostly for curtains, bedspreads and the like. Essentially you'll see departments in shops that you never even knew existed. However, the visit involves a visit to a nice eatery and good *crowd*. So, it is not too bad.

Then comes the first year trip to in-laws house for the Diwali celebrations. This is a taxing time. You need to bring out a paper and pencil and chart the family structure. All the brances have to be traced, and the leaves analyzed. And you need to remember the names and the characteristics. Once the exam is successfull - I mean the holiday is over, you can relax as you're now formally a part of the family.

The first year will have its set of mild skirmishes. These are the like friendly encounters, just like the India-West Indies matches. There are no real winners or losers and the heart is just not there to give a fight.

Second Year
By this time, you'd have accumulated a lot of holiday and can embark on a second honeymoon. This is a much a better time than the first as you're now more familiar with your better half and don't end with any foot-in-mouth scenario.

Relatives leave you alone except at the various family occasions where you are reminded repeatedly that marriage is not recreation but an a legal sanction for procreation. The best answer to it is grin. If you know the relative well, a wink is also acceptable. If you don't know what to do, just say, "Let's see" and flee from the place.

Mild skirmishes become a bit more pronounced now. Since there aren't too many invites for lunch/dinner over weekends, you get more *quality time*. So you get to discuss the *adjustment issues*. If you are an assertive husban, you will bravely defend your position and then behave as told. If you an aggressive husband, you will shout and fight and behave as told. If you are a submissive guy you wouldn't be having the conversation. So, bottom line is it is a zero sum game where the other party always wins. It is just the fighting spirit that matters. Just don't get too aggressive as the argument will then end with a 'Fine - do whatever you want'. In this case, the discussion will continue and that's in nobody's interest. What's the fun in having the same argument over and over again when there are so many new things to barb about?

Visits to saree shops and other places of general interest tends to get boring. Malls get irritating as standing outside changing rooms becomes a chore.

And by the end of year, the pressure to announce the *good news* just keeps getting worse. Getting a 200% hike isn't good enough. Visiting US of A or any other country and earning in $/GBP etc isn't good enough. There is only one *good news* and the to-be grandpa/grandma just can't wait. It is then you realize what a cornored rat feels like. There isn't a very good escape route. If there is any, please add in comments!

And thus ends the second year of your togetherness. So all you folks out there, just don't get scared - it is just a psychological feeling that can be overcome :-) Before reality hits you, you're in third year. That's the next post!

Thursday, June 23, 2011

Book Review: Myth=Mithya by Devdutt Pattanaik

-Akshay Ranganath

I keep looking through the top sellers list on Flipkart and almost always notived the book 'Myth = Mithya: A Handbook Of Hindu Mythology' by Devdutt Pattanaik. I'd seen his video on TED about 'East meets West' http://www.ted.com/talks/devdutt_pattanaik.html. I was impressed by his presentation as well as his depth of knowledge on Hindu traditions and mythology. So I lapped up the book and after reading it, I can say that it was one of the best reads in quite some time.

This book is a very quick exploration about Hinduism, the Gods, the gods (small case 'g'), the Asuras and the Rakshashas - and how they all inter-play. Very profound implications of the Hindu mythologies and deities is presented in a very easy to read fashion. Being a Hindu myself, I felt so illiterate about the religion when I read the book. Our dieties are everywhere, the mythologies are told to us regularly. Despite this, the real reason for something like the meaning of Ganesha's head or the symbolical meaning being told via Brahma's 4 heads or abundance of snake is something that had never intrigued me. Mr Pattanaik brings forth their meaning as well as the reason for significance of each aspect of such symbology.

I was very impressed with the presentation where the author brings differences between two forms of the same thing. For example, between the Devas and Asuras, Kali and Gowri, Krishna in Bhagvatha and Mahabharatha, Lakshmi and Alakshmi and finally, Shiva and Shankara. The stories of Hindu mythology are gripping by itself. When interspersed with the hidden meaning the philosophical significance comes forth.

The other aspect that I liked is the non-partisan presentation, if you can call it so. Most of the books of Hindus have a tilt towards Advaita or Dvita (monism or dualism). Mr Pattanaik presents both points of view and presents a case and its interpretation by Shaivites and Vaishnavites without getting embroiled on which form of Hinduism is better.

After I bought that book almost 4 of my colleagues were intrigued and they too told me it was an impressive book. Now it is my dad's turn :-) A very highly recommended book indeed!


Thursday, June 16, 2011

Book Review: India After Gandhi by Ramachandra Guha

I used to browse Flipkart weekly and kept noticing the book, "India After Gandhi" for quite a few months. For some reason, I thought that this was a boring tome on history and scholarly book talking about greatness of Nehru and Gandhi. However, the reviews appeared to be different and when the price came down below Rs 400, I thought of buying the book and I feel that it was a great investment.

In this story of India, Gandhi dies within the first 10 pages. Considering the book is 750 pages, this is a great achievement. We're so used to our school history books that appear to close India's history with independence. However, this book starts where the other books end. And that makes it all the more interesting.

Guha has managed to do a tremendous research and pull information and woven them together into a tapestry of an engaging story. The book evolves by showing India as a baby taking baby steps towards democracy, right after a horrendous pain and followed by an exodus of humankind unmatched at no point in time. This book gives a personalty to each person that we just see as postage stamps and passport size photos in our text books: the ever optimistic and wordly Nehru, the principled and at times quixotic Gandhi, the resolute and stern Vallabhai, the pragmatic intellectual in Ambedkar as well as the scheming and opportunistic leaders of various sectarian populace. These are the personalities who have been elevated to god-like status in the current traditions of India. This book potrays them as genuine humans, fighting and struggling to keep a nation together, a nation that most historians from West and East considered unnatural and impossible.

I liked the way the initial days of India is so well detailed: the formation of states, the first war with Pakistan, Indo-China skirmishes that leads to war, the rise and fall of Nehru and the constant struggle of early nation builders to impart the democratic structures into the Indian tradition culmiating in the constitution.

The subsequent section is about the daughter, Indira and how she schemed and systematically dismantled the democratic principles, the market competition and introduced the systematic corruption that we still see today. It's amazing in that her resoluteness to stay in power could not overwhelm the institutions of democracy that her father had help build. Her emergency backfired and she had to rise back only by winning back the popular support.

Throughout, the book unfolds the other skirmishes, the Hindi language and North-South divide, the Green revolution and the Milk miracle. It brings out the achievements of Indians that has hitherto been never highlighted as it was not related to Nehru-Gandhi. The amazing beuracracy that handled the near impossible task of settling the immigrants, the refugees of war and the humongous task of census & polling as well as the non-partisan & disciplined military arms that ensured India was never under threat of a revolution or dictatorship.

It also talks about Rajiv, his policies of appeasement that still degraded the system and then moves on to the modern issues of terrorism and the Hindu-Muslim communalism and politics of populism. It dwelves into the psyche of Hindu-fundamentalism, the worries of Islamic terrorism and the cost of such division in terms of lives lost and opportunies passed by.

The book ends with a beautiful description of India. Guha compares India to sphagetti. It is a mix of different things; never managing to stay uniform, and yet it is the whole gives it its distinct taste. India is not a state of any one religion nor language. Pakistan tried to build a nation with religion as its core and ended up as a nation marred by political upheavel. Sri Lanka tried to build a nation of a single language and ended up with a deadly civil war. India just amalgamated the differences and ensured that these differences contributed to development. Although slow and corrupt, India as a nation survived all the naysayers and set an example of a free world. And this makes it a wonderful place and one of the most fascinating countries on earth!

Wednesday, April 06, 2011

Book Review: Inside Wikileaks by Daniel Domscheit-Berg

Last week, a friend of mine happened to lend me the book "Inside Wikileaks: My Time with Julian Assange at the World's Most Dangerous Website". It is written by a person who worked very closely with Julian Assange, the man potrayed at times as being mystical being and at times as a laschivous wominzer.

The book however is more of a timeline of what the Wikileaks did for a 2 year period and less of a biography of the founder. Of course, there is a lot of details on how Julian managed to win support, of how the Wikileaks found funding and the way in which they moved to Ireland. However, if you are looking for a book on the technical nitty-gritties of how this so called unbreakable website was built then, you will be left a bit sad. There are glipmses of how the site was setup and a bit on how the encrypted data was handled. However, that's about it. There is no clear mention on how the hosting was procured and how the sensitive information was backed up and distribited to ensure it can survive the forced shut-down in any one geography.

I liked the easy flow of the story. It has been translated from German but, I never felt that it was so. The story-telling mode of narration is nice to follow and visualize.

All in a all, a book worth reading to get a glimpse into the people who built a site that scared the governments and intelligence organizations of the world. Read it for the details on the mentality of heackers and power of groups rather than to get details on Julian or the tecnology behind Wikileaks.

Price comparison from Indian sites

Friday, February 04, 2011

Book Review: John Grisham, The Street Lawyer

Last week, we had the Jan 26th holiday and I thought of spending it by indulding it by reading 'The Street Lawyer', a novel by one of my favorite author Joh Grisham.

The story is about a big shot law firm, about to be a partner lawyer who leaves everything behind to answer his calling: his calling to help the helpless and the homeless people of Washington DC. There is a twist to the story in terms of an impending lawsuit being filed. This lawsuit if against wrongful doing by rich people that rendered a group of people homeless.

Unfortunately, the story just doesn't pick up pace at any time. It promises a mystery and then just fizzles out. There is the unexplained hostage drama that appears to be the real plot but, nothing more happens beyond the first chapter. The broken marriage and mid-life crisis of a rich but directionless lawyer appears too repititive.

The story does raise pertinant quesions on the magnitude of the problem faced by the homeless people. It does make you twinge at the thought of how people can just stay out in freezing nights during winter. It almost sounds like a book related to awaken the social conscious person in the reader than a novel of fiction.

If you are looking for a pot-boiling thriller with twits and turns and leagalesse that would leave you breathless, then this is not the book for you. It is a bit depressing so don't carry in when you want to lighten the mood during a travel.

Overall, I'd say this is a novel you can give a miss, if you only looking for the thrill of regular fictional book.


Price comparison from Indian sites