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04-29-2013, 03:02 AM   #1
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Sigma 18-50F2.8 vs DA18-55WR

Hi everyone ,

I need to make a decision , between Sigma 18-50 F2.8 which I already have by

selling it and buy DA18-55WR because I want smaller and lighter equipment to carry out there.

And I want to know pros and cons of my decision.Does anyone here have any experience

with that 2 lenses ? Please share.

thanks.

Ohm.

04-29-2013, 03:40 AM   #2
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WR is better in harsh weather, more compact and lightweight.

Sigma is sharper, faster and pretty much wins in every other department.(Except maybe flare/CA, SMC might give the sigma a run for it's money)
04-29-2013, 05:50 AM   #3
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QuoteOriginally posted by Eulogy Quote
WR is better in harsh weather, more compact and lightweight.

Sigma is sharper, faster and pretty much wins in every other department.(Except maybe flare/CA, SMC might give the sigma a run for it's money)
That's mostly it. If you really want smaller and lighter, than there are not thousands of options. The 18-55 WR is a reliable lens, not the best optically but you already knew that.
04-29-2013, 06:35 AM   #4
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Maybe a DA16-45 F4? No WR but only a stop slower than the Sigma. The first review of the DA16-45 compares it with his 18-50
SMC Pentax-DA 16-45mm F4 Reviews - DA Zoom Lenses - Pentax Lens Reviews & Lens Database

04-29-2013, 11:40 AM   #5
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I have the Sigma 18-50 f/2.8 (non-macro) lens but not the 18-55 WR. I do have the DA-L 18-55 kit lens though. Anyway...you said that your reason for possibly switching is:
QuoteOriginally posted by crazy_oam Quote
because I want smaller and lighter equipment to carry out there
If these are the only two criteria for you, then you'll certainly acheive both with the 18-55 WR. If you also want/need a WR lens to go along with your K-5 WR camera, then this also makes sense and a definite plus in favor of the 18-55 WR lens.

But if you need the faster, constant f/2.8 aperture across the zoom range, then obviously the Sigma 18-50 is better in that regard. And although I've not done detailed tests between my Sigma 18-50 and DA 18-55 kit lens, I think my Sigma is sharper optically, although the kit lens can hold its own when stopped down to f/8 and used outdoors. But if you're shooting indoors in poor lighting, the Sigma will be a better option.
04-29-2013, 11:42 AM   #6
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QuoteOriginally posted by Tonto Quote
Maybe a DA16-45 F4?
yes, this would be a little lighter than the Sigma 18-50 but not necessarily smaller. And the build quality of the Sigma 18-50 is very good, probably better than the DA 16-45 from what I've read (although I can't say for sure because I've never owned/handled the 16-45). But 16mm is definitely a lot wider FOV than 18mm so that's a nice plus, along with the Pentax "colors" than the 16-45 would offer...
04-29-2013, 04:08 PM   #7
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Thank for all comment. Maybe I'll have all of them and choose to use depend on shooting condition.
04-30-2013, 05:41 AM   #8
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QuoteOriginally posted by crazy_oam Quote
Maybe I'll have all of them and choose to use depend on shooting condition.
That's what I do, actually. The 18-55 WR can be found, like new, for 100$. It's not too expensive, you can keep the Sigma f2.8 when you want high IQ, and the WR when you want to travel light.

04-30-2013, 10:39 PM   #9
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QuoteOriginally posted by bdery Quote
That's what I do, actually. The 18-55 WR can be found, like new, for 100$. It's not too expensive, you can keep the Sigma f2.8 when you want high IQ, and the WR when you want to travel light.
The 18-55WR would be the pick if you are keeping the Sigma aswell due to its WR flexibility and ultra small size.
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