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

Started Jul 24, 2022 | Questions thread
PentUp Veteran Member • Posts: 4,373
Re: Tamron 31A (200-500 5.6) vs Pentax 150-450 4.5-5.6

paulkienitz wrote:

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.

Optically speaking you are probably right, but a prime fixed at 500mm or 300mm... while fine for small birds or general wildlife that stays in the distance... isn't a lot of use for big wildlife that isn't afraid to walk up to you. Zooms have their uses too.

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