200-400 VR does not equal prime lens sharpness?

Started Nov 2, 2006 | Discussions thread
RBFresno
RBFresno Forum Pro • Posts: 13,003
Re: Test picts

Hi Mark!

Thanks for taking the time to do this test.

Jonathan,

whichever one nailed focus the best will be the winner. I've compared them plenty of times and IMO it all comes down to auto focus accuracy.

Makes complete sense to me.

If I manual focus, and repeat until focus is dead on, they both 100% completely rock and are virtually indistinguisable.

Ditto.

I will say the prime does a better job of nailing focus.... so out of practicality, the 300 does a better job IMO.

Ditto.

My guess is that if your 200-400 bites, odds are it's out of AF.

Based on what I've seen, this also makes sense.

I contiue to be very happy with my 200-400VR.

I can't ever recall having a well-focused shot @ f/4 where I've been unhappy with the sharpness. However, IMHO it needs to be stopped down to ~ f/7.1 with the TC 14E II to equal the f/4 non-TC sharpness.

Good points Mark.

Best Regrds,

RB

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