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blackfox
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has anyone any experience of this old sigma 400mm f5.6 prime lens ,i.e is the i/q any good ,although they are often sold as manual lens i wonder if they will a/f on a d7000 or d300 .just a idea running thru my head surely someone on here will know .
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Robert
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I think you will struggle Jeff.
The best thing will be to try it but while it MAY be OK on a bright day, here in the UK in 'normal' light I think it may be a bit slow.
But you normally use a 300 f4 with a 1.7TC don't you? That must be some way north of f5.6, so you may be in familiar territory...
The 400 will give you the equivalent framing of a 600 on a DX body, compared with (300 x 1.7 = 510) x 1.5 = 765mm with a 300 + 1.7TC.
A better bet might be a 500 Sigma, Eric had one and it was superb. That would give the equivalent framing on a DX body of 750mm with no TC.
What are you trying to achieve with the 400? Saving weight, or simplicity? The IQ you have is very good so I don't see improving on that with a Sigma. I briefly had a Sigma 400 f4 I think but it may have been a 5.6. I will try to check that.
I took some test images but I can't find them, will have a dig, I may have ditched them during a clear out.
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jk
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I havent used that lens but I have the Sigma 80-400 f4-5.6 which performs pretty much the same as the Nikon. A little softness at max aperture and max focal length.
It might be worth finding one of these on ebay if you wan a 400mm.
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blackfox
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the reason i ask is the prime seems to be going for around £100 on the bay ,and i wanted it for the back up camera for the wife ,i can already achieve 300mm 420mm and 500mm with the t/c's on my camera.just a thought process thing really .
i have already ordered a 55-300vr for her ,had one before but sold it to fund the 300 prime .so i know it performs well above its price range ,£219-00 BNIB but just wanted that bit more reach :baffled:
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Iain
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The last one I tried on a D300s would only manual focus Jeff.
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blackfox
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cheers ian thats the one i wanted to know
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