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FORUMS Photography Talk by Genre Critique Corner
Thread started 16 Aug 2017 (Wednesday) 22:45
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sharpness advice.

 
Nickothurston
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Aug 16, 2017 22:45 |  #1

Hello, I took this shot in pretty terrible light but I was just wondering if anyone had any suggestions for how to deal with heat shimmer or anything else I could have done to get a sharper cleaner image? thanks!

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saea501
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Aug 17, 2017 06:58 |  #2

Ya know.........there is such a thing as being too sharp.

And I think the heat shimmer adds to it.


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TeamSpeed
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Post has been edited 1 month ago by TeamSpeed.
Aug 17, 2017 07:32 |  #3

There is a ton of heat shimmer as evidenced in the ground area. Also, a TC is going to degrade IQ a bit. Finally, why shoot birds at f11? If you were very close, I guess I could see that, but if this was quite far, then f11 might be overkill and you might be hitting diffraction issues? I probably would have left it at f8 personally.

At 40' you have 6 inches of DOF, and if you place the focus on the bird properly, that is more than enough to get all of the bird in focus. I would almost suggest doing AFMA on the lens+TC to push your focus back quite a bit, almost +10.


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Nickothurston
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Post has been edited 1 month ago by Nickothurston.
Aug 17, 2017 11:45 as a reply to TeamSpeed's post |  #4

Thanks for all the advice, I was shooting at f11 because I was very close about 12 to 15 feet, also how would the +10 help? just curious I am pretty new to microadjusting. thanks again.




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TeamSpeed
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Post has been last edited 1 month ago by TeamSpeed. 2 edits done in total.
Aug 17, 2017 21:30 as a reply to Nickothurston's post |  #5

Only the front of the bird is in focus, and it appears that the ground in front is focused. +10 is just from my experience, and if focus falls to far behind, bring the number down to around 7. You can store one adjustment just for the lens, and a separate one for the TC combo.


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CyberDyneSystems
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Aug 17, 2017 21:47 |  #6

Looking at EXIF, slightly higher ISO and slightly less stopped down = double or more your shutter speed.


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icor1031
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Sep 06, 2017 01:26 |  #7

TeamSpeed wrote in post #18429894 (external link)
There is a ton of heat shimmer as evidenced in the ground area. Also, a TC is going to degrade IQ a bit. Finally, why shoot birds at f11? If you were very close, I guess I could see that, but if this was quite far, then f11 might be overkill and you might be hitting diffraction issues? I probably would have left it at f8 personally.

At 40' you have 6 inches of DOF, and if you place the focus on the bird properly, that is more than enough to get all of the bird in focus. I would almost suggest doing AFMA on the lens+TC to push your focus back quite a bit, almost +10.

Even if he isn't reaching diffraction limitation, he's probably well beyond f/ for peak sharpness.


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sharpness advice.
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