Tamron 31A (200-500 5.6) vs Pentax 150-450 4.5-5.6

Started Jul 24, 2022 | Questions thread
paulkienitz Veteran Member • Posts: 5,461
Re: Tamron 31A (200-500 5.6) vs Pentax 150-450 4.5-5.6

kypfer wrote:

gkreth wrote:

I bought a Sigma 50-500 many years ago, and I was disappointed; it seemed very soft at the long end (I know most zooms are softer at the long end, but this copy was just too soft to be acceptable). It also had, well, kinda lousy contrast.

I was wondering about the old Tamron Adaptall 200-500 f/5.6.

My Tamron 200-500mm is the earlier f/6.9 … it's fine on a tripod but not really ergonomically suited to hand-held work.

My Sigma 150-500mm is superior in virtually every respect and is my "go-to lens" for general "birding and wildlife".

I haven't tried a Tamron 200-500 but this is consistent with the general word of mouth, that the Sigmas are better.  And I have tried the 150-500... I ended up sending it back.

For birds and wildlife, my finding was that the best way for me to reach 500mm is to use a DA* 300/4 and crop it, or add the 1.4x TC and crop just a little.  Nothing else I have ever tried has ever matched it.

 paulkienitz's gear list:paulkienitz's gear list
Pentax Q Pentax K-3 Pentax smc DA 55-300mm F4.0-5.8 ED Pentax smc DA* 300mm F4.0 ED (IF) SDM Samyang 8mm F3.5 Aspherical IF MC Fisheye +4 more
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