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DPChallenge Forums >> Tips, Tricks, and Q&A >> Aperture vs shutter speed and DOF
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Showing posts 26 - 34 of 34, (reverse)
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 12/22/2004 03:01:43 PM · #26
Originally posted by moodville:

So my question is... what creates that blurred background? DOF? Lens length? Focal range? Distance to subject? Bokeh?

I would add another factor of relative distances of lens to subject and subject to nearest background.
You can get a very good blur if the background is far off
 12/22/2004 03:21:00 PM · #27
yes, i wasn't suggesting you use photoshop, just guessing at how they did it. I just took a look over on photo.net and your right, I saw a lot of f8 and f9's. I think the background must have been VERY far away.

Originally posted by moodville:
Originally posted by hopper:
photoshop?

Originally posted by moodville:
So my question is... what creates that blurred background? DOF? Lens length? Focal range? Distance to subject? Bokeh?


I'm sure some people do it that way! I was kinda wanting to do it in camera. Call me a purist.... for a change :P
12/22/2004 03:39:14 PM · #28
Originally posted by gaurawa:
Originally posted by moodville:

So my question is... what creates that blurred background? DOF? Lens length? Focal range? Distance to subject? Bokeh?

I would add another factor of relative distances of lens to subject and subject to nearest background.
You can get a very good blur if the background is far off


So thereotically at 300mm on my crappy telephoto I could still get the completely blurred background if the critter was far away from the background? Hrm, I guess that would depend on perspective too as the ground could become a type of background. Maybe that is why the fuller the object is in the frame the less surrounding background there is.
 12/22/2004 03:39:48 PM · #29
What is "bokeh"?
 12/22/2004 03:41:14 PM · #30
Bokeh

More Bokeh

Message edited by author 2004-12-22 15:41:56.
 12/22/2004 03:41:53 PM · #31
Originally posted by Judith Polakoff:
What is "bokeh"?


Bokeh is the out of focus background. Different lenses have different types of bokeh.

Explanation of bokeh
 12/22/2004 03:44:58 PM · #32
Thanks to you both, moodville and doctornick.

When you say different lenses have different types of bokeh, is that because of something the manufacturer of the lens is doing to it, or just that different focal lengths have different types? So every 300mm lens will have the same type of bokeh regardless of manufacturer?

Sorry if these questions are answered in the articles you referred me to; I'm going to read them now.
 12/22/2004 03:58:22 PM · #33
No Bokeh differs from different manufacturer and from different lenses. For example the Canon 70-200mm f/2.8L IS has circular aperture blades producing Bokeh that's different from the Canon 70-200mm f/2.8L Non-IS lens.
 12/22/2004 04:00:27 PM · #34
I found the answer. Bokeh is "determined by the shape of the diaphragm opening and the details of the lens design's aberrations," according to one of the Luminous Landscape articles. Thanks again for the references!
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