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04-20-2009, 04:30 PM   #1
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Sigma 135-400mm f/4.5-5.6 APO and a tamron 1.4 pz-af mc4 teleconveter

42nd st photo has the Sigma 135-400mm f/4.5-5.6 APO-ASP Lens for 480.00 dollars. Would a tamron 1.4 pz-af mc4 teleconveter work on this lens?

04-20-2009, 04:47 PM   #2
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QuoteOriginally posted by jon pafford Quote
42nd st photo has the Sigma 135-400mm f/4.5-5.6 APO-ASP Lens for 480.00 dollars. Would a tamron 1.4 pz-af mc4 teleconveter work on this lens?
It will work.

At the long end, the auto focus will hunt a bit. But if there is something contrasty to lock on, it'll be OK.
04-20-2009, 08:02 PM   #3
AlexD
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Re: Sigma 135-400mm f/4.5-5.6 APO and a tamron 1.4 pz-af mc4 teleconveter

That TC should fit onto the lens OK.

Under what kind of lighting will you usually be shooting? Also, what subjects?

For fast sports or birds-in-flight, I don't think you will be happy, unless there is plenty of light. With a TAMRON 2x TC on my SIGMA 70-300mm f4-5.6, at 70mm AF sounds weird and hunts alot. It often avoids locking on all-together. (F4 with a 2x TC is about equal to F5.6 with a 1.4x TC).

Plenty of light or static / slow subjects is best.
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