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06-06-2011, 08:51 AM   #1
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Pentax 16-45mm F4 or Sigma 15-30mm F/3.5-4.5

I am planning to buy a good wide angle lens that has better overall IQ than the DA kit lens 18-55mm.
I will be using it for landscape, portraits where the environment is included and group photos, macro photography and wide angle close-ups (including portraits) as well.
I don't want to spend more than $500. From my research Pentax 16-45mm and the Sigma 15-30mm are both good lenses but I have read much better reviews about the Sigma lens but it is quite heavy. I am also considering the much cheaper Vivitar/Promaster/Tokina/Cosina 19-35mm.
I am wondering if anyone has used these lenses and can provide additional insight. I appreciate it.

06-06-2011, 09:26 AM   #2
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My 16-45mm has very good IQ. It is much better than the kit lens it replaced.
06-06-2011, 01:26 PM   #3
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The DA 16-45 is as good as any wide-normal zoom in its price range. It rivals the DA* 16-50 in many aspects (but obviously not in speed). Its only weak point is shooting wide open at the 16mm end. Otherwise it's a sharp and good value lens. Definitely a good step up from the kit lens, but only for landscape type images where speed is not an issue.
06-06-2011, 04:03 PM   #4
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You could add the Tamron 17-50 f2.8 to your list. I usually use it for landscapes but it makes a great portrait lens too with it's fast aperture. Here are a few sample shots:





06-06-2011, 06:31 PM   #5
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You might want to add the Sigma 17-70mm DC (HSM-OS or not) f:2.8-4 to that.
The added reach of the 70mm is worth it to me..and it also has Macro feature that can focus as close as 0.22cm for a 1:2.7 at 70mm.
06-07-2011, 01:48 PM   #6
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Thanks for all the replies. It seems like pentax 16-45 is a great wide angle lens at its price. I would have liked to have a comparison between this lens and the Sigma 15-30 which from all the reviews seems to be an even better lens!
06-07-2011, 04:09 PM   #7
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I can tell you that the Sigma 15-30 lens is an over looked glass and is quite good. Plus, it is full frame which made it usable on my MZ-3. I sort of regret selling mine and there aren't many zoom lenses I can say that about. Its sibling the 20-40/2.8 was quite good as well.
06-07-2011, 05:11 PM   #8
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My 16-45 is pretty similar in image quality to my (first-gen) kit 18-55. The main advantage is the 2mm on the wide end and the wider aperture at 45mm. I wouldn't upgrade for image quality reasons, unless they're something wrong with your 18-55.

I don't have the Tamron but would consider it if the price was reasonable.

Paul

06-08-2011, 10:30 AM   #9
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I've got a Pentax 16-45...it's a great lens. I've had it since Dec., 2007 and it get's a workout, no problems so far.
06-08-2011, 10:34 AM   #10
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QuoteOriginally posted by lesmore49 Quote
I've got a Pentax 16-45...it's a great lens. I've had it since Dec., 2007 and it get's a workout, no problems so far.
Screw drive failures are rare even in F series lenses that have been in use since the 80s.
06-08-2011, 06:57 PM   #11
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I was sure I'd love the 16-45, and mostly I did. But it's gone now, how did that happen? Well, I found 45mm too limiting for my primary zoom, which I later solved with a 17-70. If you can be OK with staying wide it's a very good lens.
06-08-2011, 07:12 PM   #12
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Thanks for all the responses. I actually decided on something different which hopefully suits my needs on a budget. I went ahead with the Tamron 10-24mm! I have 28mm and 50mm primes so I hope I won't regret.
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