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RE: [photo-740] Interesting Article on DoF and Bokeh

From: Marco G.
Sent on: Wednesday, March 6, 2013 9:30 AM



I did read many, but not all, of the comments.  That’s one of the things I found to be interesting about this article.  From my perspective the author was correct on his main point concerning sensor/film size and depth of field (DoF).  Most of the comments I read, particularly those that were hyper critical, were partly correct but didn’t get it all either.  It reminds me of the story about the blind men and the elephant.


I took photography classes as an undergraduate at Michigan State in the late 1970’s.  90% of our shooting assignments were completed using our personal 35mm film cameras.  The university owned several 120 medium format we used for the rest of our work.  We spent an entire week in class discussing DoF.  The instruction was heavy on the optics/physics with a dash of practical application thrown in.  We were then sent out to incorporate what we learned in our photography.  We then experimented in the darkroom with making different sized prints of a single image.  Using those prints, we then critically evaluated them from different viewing distances.


All this was to reinforce the “rules” of DoF.  Professor Clendenning taught that DoF was affected in three phases; capture, printing, and viewing.  At the time of capture there are three variables that affect the DoF: aperture, distance from the camera to the subject, and focal length.  Film/sensor size is also a factor but it’s fixed for a particular camera body.  During the printing phase the two primary factors are negative size and print size.  When viewing, print size and distance to the print affect how DoF is perceived by the viewer.


I am always amazed and entertained by how ferocious photographers can become when discussing DoF.



From: [address removed] [mailto:[address removed]] On Behalf Of Mark Stadsklev
Sent: Wednesday, March 06,[masked]:13 AM
To: [address removed]
Subject: Re: [photo-740] Interesting Article on DoF and Bokeh


Hi Marco.  Did you read the comments section?  Evidently not such a great article .  I often get more from reading the comments than the "articles" themselves. Mark

Mark Stadsklev

Sent from my iPhone

On Feb 25, 2013, at 1:47 PM, Marco Gutierrez <[address removed]> wrote:

Hey everyone!

I hope you're enjoying our great weather today.

This link is to an interesting article that appeared in the online version of the New York Time.  Robert Halverson forwarded this to share with us.  The article is titled "Blurry Backgrounds, Big Sensors and Bokeh".  Here is the link:

Don't forget the free seminar Wednesday night (February 27th) with Peter Read Miller and Jeff Schultz.  It will take place on Wednesday, February 27th at the Wendy Williams Auditorium (UAA campus) from 6:45pm to 9:30pm.

Peter Read Miller has been photographing athletes, events, and the sporting life for more than 30 years. Currently a staffer at Sports Illustrated, where he has worked for over 20 years, Peter has shot over 100 SI covers. He has covered 8 Olympic games, 34 Super Bowls, 14 NBA finals, as well as Stanley Cup finals, the World Series, the Kentucky Derby, the NCAA Basketball Final Four, and the World Cup soccer finals. Peter is a Canon Explorer of Light, he teaches a yearly sports photography workshop in Denver, and he is an active speaker at events such as Imaging USA and Photo Plus.

Alaska photographer, Jeff Schultz has been photographing in Alaska since arriving in 1978. A native of the Bay Area of California, Jeff moved to Alaska chasing his dream of building a log cabin and living off the land. While that never materialized, he knew he was home when he arrived in Alaska. Jeff has been photographing both stock and assignment photos of Alaska and Alaskans ever since. Jeff's God-given talent of photography has afforded him a unique lifestyle to travel throughout Alaska photographing both assignments and stock photography. His images have been published world-wide in books, magazines, advertisements, brochures, annual reports, websites, retail products and more. Jeff founded Alaska's largest stock photo agency, Alaska Stock Images in 1990 and operated it successfully until October 2012 when he sold it. Jeff continues to do photography for corporate and editorial clients as well as shooting stock.

For more information call: (907)[masked]

Wendy  Williams Auditorium, 2533 Providence Drive, Anchorage, AK 99508 (free parking after 6:30pm)

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