On Tue, Nov 23, 2010 at 8:10 PM, Tanya Love <tanyal...@bigpond.com> wrote:
> So I really am needing a good wide angle zoom.  I've been procrastinating on
> it for ages and "making do" with my 18-55mm kit lens, but it's not fast
> enough, and optically, could be better too.  Sooo, would love to hear your
> words of wisdom in regards to comparing these:
>
> 1. Sigma Lens 20-40mm f/2.8 EX DG ASP - about $400
> 2. PENTAX-DA* 16-50mm f/2.8 ED AL[IF]SDM - about $1400
> 3. Pentax Lens 12-24mm f/4 ED AL IF DA - about $1269
> 4. Sigma Lens 10-20mm f/3.5 EX DC HSM   - about $927
>
> Obviously the 20-40 would be a whole lot less in terms of $$ and you usually
> get what you pay for, but I thought I'd throw it out there to see if anyone
> has any experience with it?
> I'm fairly certain that I am set on #2, but interested to here all of your
> feedback first...
>
> Tan.x.
>

The 20-40 isn't wide at all, I'd skip it (it's intended for a
Full-frame camera) and the 16-50's a general purpose zoom.

This is one case where I'd unabashedly recommend the Sigma. The 10-20
f3.5 is simply a better lens than Pentax's good but not exceptional
12-24 and the Sigma's cheaper as well.  The only lens in this range
I'd consider over the Sigma is Tokina's incredible 11-16 f2.8 but it's
not available in Pentax mount.

Don't get me wrong, the 12-24's a good lens (as is the Tokina 12-24
where the design originates) but the Sigma is definitely better. It's
wider, faster, sharper and has better AF.

-Adam

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