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500mmVR Focus/Clarity Issues or not??? advice/opinio...

jbloom

Wethersfield, US
7735 posts

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"RE: 500mmVR Focus/Clarity Issues or not??? advice/opinions please!?"

jbloom Gold Member Awarded for the continuous and generous sharing of his high level expertise and his always encouraging comments in several forums. Donor Ribbon awarded for his generous support to the Fundraising Campaign 2014 Nikonian since 15th Jul 2004
Sat 15-Dec-12 02:27 PM

Going FX is the last thing I would do. You bought a long lens because you can't readily get close to the subject; why would you want to give up the 1.5x FOV factor of your DX body?

It's hard to analyze the image you posted, but I have a couple of thoughts:

Yes, f/14 is non-optimal. However, diffraction effects aren't all that severe at f/14; certainly they are a second-order problem. Deal with the larger issues before worrying about those. Still, you should be able to shoot that lens wide open and get sharp images. Or stop down a bit, say f/5.6, to be sure.

I do think the underexposure masks some of the sharpness. After all, sharpness is just high contrast between adjacent pixels. When you underexpose, you limit the possible contrast.

Also, I would shoot at the lowest ISO that's practical. You are at ISO 500 in this shot. You could have exposed at ISO 100, 1/1000, f/4.5 or thereabouts. Or if you wanted a bit more DOF, go to f/6.3 and ISO 200. The D7000 does a nice job at ISO 500, but when you are severely cropping -- and underexposed -- you can see the noise that's creeping in and causing loss of detail.

But the biggest issue I see is that the subject is just too small in the frame. In this case you had plenty of light, so you could have added a teleconverter to make the subject better fill the frame. A 1.7x or 2x TC would not have been out of place here. In my mind, that would have been the number one thing you could do to make a better image (other than actually getting closer, of course).

-- Jon
Wethersfield, CT, USA
Connecticut High School Sports Photos

Visit my Nikonians gallery.

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