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Archive 2013 · Canon EF 16-35mm f/2.8L II question
  
 
chihiro
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p.1 #1 · p.1 #1 · Canon EF 16-35mm f/2.8L II question


Hi

which aperture of the lens canon 16-35mm reaches most sharpest
is it when is 16 f or or when 13f or 11f
which f number whould you recoment to achive maximum sharpness?...

i am asking for landscape photography...
Thank you



Jan 13, 2013 at 11:29 PM
scalesusa
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p.1 #2 · p.1 #2 · Canon EF 16-35mm f/2.8L II question


The answer changes depending on the camera used, the sensor size and photosite density have a definite effect. In the case of a zoom, it also varies with focal length.

Generally, by somewhere in the range of f/8-f/11 diffraction reduces sharpness below optimum, but that does not mean that you should not use f/16.



Jan 13, 2013 at 11:46 PM
John_T
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p.1 #3 · p.1 #3 · Canon EF 16-35mm f/2.8L II question


I would probably choose f/11 at 16mm and f/5.6 at 35mm, but check what the blur index says here:

http://slrgear.com/reviews/showproduct.php/product/1082/cat/11



Jan 13, 2013 at 11:48 PM
carnac
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p.1 #4 · p.1 #4 · Canon EF 16-35mm f/2.8L II question


Depends on sensor size. For a FF body, I would say f11 (sharp and still minimal diffraction). However, the overall picture may appear sharper at f16 (or even higher) due to DOF. On a crop body, max sharpness probably occurs around f8, but f11 would give better DOF and diffraction isn't too bad yet. If you are shooting landscape and are looking for max sharpness (I would assume on a tripod) then just take a picture at f8, f11, f16, f22 and decide which is sharpest for the actual shooting situation. Digital film is cheap.

Jim



Jan 13, 2013 at 11:49 PM
chihiro
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p.1 #5 · p.1 #5 · Canon EF 16-35mm f/2.8L II question


i use 5d mark iii camera.
so best will be to use about f11 on full frame body? on 5d mark 3 you dont recomment higer ten f11? what is by the way diffraction....
Thank you for the answers!




Jan 14, 2013 at 01:24 AM
carnac
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p.1 #6 · p.1 #6 · Canon EF 16-35mm f/2.8L II question


Yes - on the 5D, I would probably use f11. I believe max sharpness without respect to depth of field is at f8 (according to the Canon MTF charts). However, if I need more depth of field, then f16 or even f22 may give an overall sharper picture. The difference in sharpness between f8 and f11 is going to be VERY minimal.


Jan 14, 2013 at 01:36 AM
 

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Tom Dix
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p.1 #7 · p.1 #7 · Canon EF 16-35mm f/2.8L II question


Ff. I would go 11-16, cropper 8-11

Bracket and pick the best. Interested to hear your findings.



Jan 14, 2013 at 03:54 AM
PhilDrinkwater
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p.1 #8 · p.1 #8 · Canon EF 16-35mm f/2.8L II question


The pro version of focal by reikan can tell you, with the aperture sharpness test.


Jan 15, 2013 at 07:52 AM
ben egbert
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p.1 #9 · p.1 #9 · Canon EF 16-35mm f/2.8L II question


I don't base it on center sharpness which is what degrades by means of diffraction as you stop down but by when the corners are acceptably sharp. For mine on a 1DS-mk3, f11 is a good trade off between center and corner sharpness. I don't care how sharp the center is, if the corners are mushy it looks bad to my eyes.

F13 may be better, but it shows too many dust bunnies by then.



Jan 15, 2013 at 04:20 PM
stanj
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p.1 #10 · p.1 #10 · Canon EF 16-35mm f/2.8L II question


I'd say f11 based on my experience; at that point you're getting already into diffraction and stopping down further will hurt you. I have had great results at f8.


Jan 15, 2013 at 05:13 PM
Tom K.
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p.1 #11 · p.1 #11 · Canon EF 16-35mm f/2.8L II question


My 16-35 is brutally sharp. Razor. Tack. It is best on a tripod at f/9. I am on full frame 5d mark 2 and 5d mark 3.


Jan 15, 2013 at 05:48 PM





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