Vrabac02.jpg by Miljenko Devcic


02-NOV-2004

Sigma 50-500 + Sigma 2x teleconverter

Nikon D70 ,Sigma 50-500mm f/4-6.3 EX APO RF
1/90s f/16.0 at 1000.0mm iso800 full exif

other sizes: small medium large original auto

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Guest		20-Mar-2006 08:01
The reason is ask is i use the 100-300 f4 with sigma 1.4tc, AF works fine, i am considering sigma x2 tc, this will mean effectrively f8, i am trying to decide how well it will work, i shoot action which is a worry !

Miljenko Devcic		17-Mar-2006 10:26
Of course, there is no way you can make D70 autofocus at f12.6 ! Even with 1.4x TC AF is impossible. Actually, Sigma TCs simply switch off your camera AF when used with slow lenses. If using Kenko TCs, AF is engaged, but not managing to autofocus with success. The only out-of-spec" combo I managed to make working is D200 + Sigma 50-500 + Kenko 1.4x TC. This gives you effective f9.0 and working AF but with lots of hunting.

Guest		16-Mar-2006 12:30
Great Shot, are the shots with the TC all manual focus

Guest		14-Dec-2005 05:01
Oh man, that is one helluva shot!

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