| Joined: | Wed Apr 18th, 2012 |
| Location: | United Kingdom |
| Posts: | 4204 |
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You made me go back and look at the info for the days shoot. Early in day I was getting F13 and was on 800 ISO but these shots as posted were as light was going and were at 1000 ISO still 1/800 sec (I nearly always shoot shutter priority and fixed ISO) sorry as posted shot: F11 or F10. With this lens I am very happy if I can get to f16 as dof is a major problem with birds and very long lenses as I was shooting all day with 500mm plus x1.4 = 700mm. I agree with shorted focal length lenses F11 is best news but deffraction with small f nos does not seem to be the same problem is was with the older lenses in film days. Then when I did a lot of studio work with 4x5 and 8x10 view cameras I often shot at f32 and got very sharp pix but it was with long focal lenses and the hole is much larger for the same f no with a small camera! Deffraction is the bending of light round a small hole is about tec as I get!
I was talking to another serious bird photographer and was interested to hear he always shoots with aperture priority and auto ISO. (He is a Canon person!!!)
I have tended to err on the side of caution at f11 even with the 500mm. As a result on small bird shots the dof hasn't always been enough. I have also been concerned going smaller aperture would mean compromising on shutter speed or ISO....both of which bring their own potential negative effects.
I suppose at the end of the day (or even on a UK winter midday 😆) we have to decide which of the three 'priorities' is going to be sacrificed. (ie Shutter speed, aperture or ISO)
I often set the camera to Manual and the ISO to auto. I then have selection choice of both shutter speed and aperture... at the expense of the ISO, which is less of a concern with the D850.
Even so, something still has 'to give' if lighting is poor.......
1/400th (too slow for small bird) @ f11 (too wide for a small bird) and 4500 ISO (starting to show noise even with the D850).
Perhaps the answer is not to bother taking the photo, if this is all the light allows you.
Last edited on Sun Mar 8th, 2020 13:24 by Eric
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Eric