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Archive 2012 · Dayton, Ohio Cityscape
  
 
LawDog2006
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p.1 #1 · p.1 #1 · Dayton, Ohio Cityscape


Love to have some c&c on this shot. It's an HDR and I was going for a more realistic shot so I tried to keep tone mapping down. Taken with Nikon D7000 35mm 1.8G, f20, iso 160 to reduce noise.

http://flic.kr/p/cUE2BW










Sharpened



Edited on Aug 21, 2012 at 03:34 AM · View previous versions



Aug 19, 2012 at 03:42 PM
RoadconePhoto
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p.1 #2 · p.1 #2 · Dayton, Ohio Cityscape


Oter than looking extremely soft it looks okay. I believe you're the victim of diffraction here.


Aug 20, 2012 at 12:44 PM
LawDog2006
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p.1 #3 · p.1 #3 · Dayton, Ohio Cityscape


The softness has been annoying the crud out of me also. Being a newbie, how can I eliminate/reduce diffraction? Is there a way to head it off or just something I have to deal with post-process? (I'm searching the boards on the topic now too).

Thanks.



Aug 20, 2012 at 02:29 PM
dcains
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p.1 #4 · p.1 #4 · Dayton, Ohio Cityscape


Don't stop the lens down so much. With a D7000, I might limit myself to f/6.3 or 7.1, but trial and error will help you make that decision.


Aug 20, 2012 at 02:35 PM
LawDog2006
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p.1 #5 · p.1 #5 · Dayton, Ohio Cityscape


I was just reading that the larger aperature the more diffraction there is, so stopping it down would produce less. DCains - it sounds like it's more of an inverted bell curve idea (diffraction on the vertical and f-stop on the horizontal) than a linear progression. Is that correct?

Also, since I was going for a deep DoF don't I need that high f-stop?



Aug 20, 2012 at 02:38 PM
 

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dcains
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p.1 #6 · p.1 #6 · Dayton, Ohio Cityscape


The smaller the aperture (larger f/stop number), the greater the diffraction. I can't say whether the progression is linear, or not, but the higher the pixel density, the bigger risk your camera sensor has of creating diffraction.


Aug 20, 2012 at 02:43 PM
dcains
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p.1 #7 · p.1 #7 · Dayton, Ohio Cityscape


As for aperture, diffraction, and DoF, it will all be a compromise, so play around and see what the limits are of each body/lens combination you have. I can use a much smaller aperture with my 10D (6 megapixels) than I can with my 1Ds2 (17 megapixels), but that's the way it is. You should check out a DoF calculator (several free online). Also, google "hyperfocal distance", which is useful for landscape photography.



Aug 20, 2012 at 02:52 PM
LawDog2006
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p.1 #8 · p.1 #8 · Dayton, Ohio Cityscape


Research and reading is underway! Thanks dcains


Aug 21, 2012 at 03:28 AM
dcains
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p.1 #9 · p.1 #9 · Dayton, Ohio Cityscape


You're welcome.


Aug 21, 2012 at 04:48 AM





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