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06-21-2007, 03:39 PM   #1
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Join Date: Dec 2006
Location: Wisconsin
Posts: 165
Tamron 28-75 or Pentax 16-45?

Looking for advice/opinions on the following 2 lenses -

* Tamron AF 28-75mm f/2.8 XR Di LD Aspherical
* Pentax DA 16-45mm f/4.0 ED AL

My lens kit currently consists of -

* DA 18-55 (kit lens)
* DA 50-200
* FA 50 - 1.4

I'm happy with the 50-200 and the 50 - 1.4 but I'd like to upgrade from the kit lens. Not that it's a bad lens, but from what I've read the Tamron and the Pentax 16-45 are sharper and a definite step up.

I like the wider range of the 16-45 but I like the wider aperture availability of the Tamron for low light situations.

I'm leaning towards the 16-45 but want to know if it's generally as sharp as the Tamron 28-75.

Any opinons from those with experience with these lenses?

Appreciate all responses....

06-21-2007, 03:47 PM   #2
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Join Date: May 2007
Location: Netherlands, Eindhoven
Posts: 133

I own the 16-45 and I must say that in low-light shooting it is not your perfect lens. But then again which lens is? It depends on your type of shooting.

If you like a wide, sharp lens that is at least as sharp as the DA* 16-50 will be, go for that lens. The extra stop might be nice, but look for some tests of the tamron too. if it shows that you need to stop down to F4 or F5.6 for the same resolution figures you might as well just get a decent f4.

The XR might have a very decent build quality but I have no experience with it. The DA 16-45 has a very reasonable build quality. I think it is quite better and more rugged built then the 18-55, although they look the same.

A problem with the 16-45 is the CA but in my experience you can very easily remove this without a hassle.

Another problem that I personally have is focussing problems in wider angles (16-24). The lens occasionally does not acquire focus lock even when I do point it at something that should be focussable. If I zoom in to 45, acquire lock, zoom back out to 16 or whatever it does still have the lock and the pictures are sharp. So .. That's my workaround. I'm not sure if the lens should behave like this or that my copy is weird. It's just a new one tho so it sounds weird.

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