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D7100 Focus issues

Brubish

Gloucester, UK
14 posts

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Brubish Silver Member Nikonian since 27th May 2013
Tue 04-Jun-13 12:44 PM

I've uploaded five jpgs to my gallery for comments on my focusing performance at 300mm. I bought the D7100 18th May and thought right! from now on any focus issues are down to me!
They are shots of Bob Atkins resolution chart taken using 70-300mm f4.5/5.6.
Labelled Af Trials 1 to 5, they should be in order of best to worst focusing technique.

1. Manual focus, LiveView at max, Tripod, VR OFF
2. AF focus, Fine=tune ON at -8, Tripod,VR OFF
3. AF focus Fine-tune off, Tripod, VR OFF
4. Hand-held VR ON
5. Hand-held, VR OFF

Question. Is res of 6.3 best that can be achieved from 70-300 f4.5/f5.6?
Question. What res should I expect if I upgraded to say a 70-200mm f2.8?
Question. How to improve my technique in shot 4

Brian

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