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FORUMS Photo Sharing & Visual Enjoyment Urban Life & Travel 
Thread started 14 Jun 2006 (Wednesday) 09:33
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Park Bench. I need a rest. Version 2

 
BillsBayou
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Jun 14, 2006 09:33 |  #1

Ok, Shooting Info on the original park bench: 1/3200 sec, f/1.4, ISO 100, Exposure compensation 0, shot Raw, tweaked a bit in DPP and Photoshop.

I went back to this bench this morning. I must have been 10-12 feet away from the bench when I shot the original photo. I'll leave it to someone else to explain the size of the bokeh in both photos.

I shot this one with only a little more knowledge than I had before. Shooting info almost the same but with an Exposure Compensation of -2/3. Yeah, it's a bit soft. :confused: I was working harder on the composition than focus, I guess.


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jwbker
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Jun 14, 2006 18:52 |  #2

Bill, I think the difference in bokeh can be explained by the change in the depth of field as a result of the distance to the subject. If your first picture was taken at a distance of 12 feet, then the depth of field at 50mm would be about 1.5 feet. You didn't give a distance for the 2nd one but I figure it was about 20 ft, which would make DoF almost three times greater. Since the distance from the bench to the trees is the same, the bokeh is going to appear more blurred in the first photograph because of the greater proportional distance from camera to subject and forest.

That's not too rigorous mathematically, but it's how I try to visualize what the bokeh is going to be when I compose a shot. The resident gurus here may have a better explanation.

One cool article about bokeh is on www.luminous-landscape.com (external link). Here's a link (external link) to that. Reichmann demonstrates the relationship between the image size of the subject vs. the bokeh.

The other cool site to check out which has been mentioned on this site many times is the Online Depth of Field Calculator (external link). (You didn't think I did all that in my head did you?)

Hope that helps!


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BillsBayou
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Jun 16, 2006 09:13 |  #3

Thanks for the info and links.


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stupot
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Jun 16, 2006 18:44 |  #4

i prefer this one:) good job.


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Jun 16, 2006 19:01 as a reply to  @ stupot's post |  #5

Thanks for the links jwbker. I'm almost thinking a carry around table would be nice. Odd some camera displays don't show DOF calculations ...

To the OP - nice composition!


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Park Bench. I need a rest. Version 2
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