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11-19-2012, 10:34 AM   #31
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QuoteOriginally posted by snake Quote
Correct, in reality, though others do make good wideangle lenses for crops. Pentax, for some reason, does not. The 15 might be ok, but it's still an F4.

Pentax doesn't even have a good, fast 24 to allow the K-5 to compete with an X100.
You're right, some of the lenses are missing in Pentax's current lineup. But fast wide-angle lenses are a weakness of ALL crop systems not just Pentax.

Canon and Nikon both have a 20/2.8 which Pentax has discontinued in favor of the 21/3.2 Limited. That half-stop doesn't strike me as overly important. Optically they're pretty close. If you really want a 20/2.8 then you can get one used.

Canon and Nikon both have a 14/2.8 but so does Pentax. None of them are particularly amazing lenses.

I personally wish I could get a 24mm lens that's faster, sharper and lighter than my Tamron 17-50 at 24mm. But the Pentax 24/2 and Sigma 24/1.8 are both not as sharp as the Tamron at equivalent apertures, and they're not small either.

Looking at the lenses you've got, I'll repeat my recommendation of the Tamron 17-50, Pentax DA* 16-50, or Sigma 17-50. That's about the best you're going to do. I can speak from experience with the Tamron 17-50 that in the 17-24mm range you're not really going to do any better with primes. Which is why my widest prime is an FA 35/2.

11-19-2012, 11:04 AM   #32
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The thing that worries me about the Tamron is that I read too much about focusing issues people have with them.
11-19-2012, 11:12 AM   #33
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QuoteOriginally posted by msatlas Quote
I personally wish I could get a 24mm lens that's faster, sharper and lighter than my Tamron 17-50 at 24mm.
You won't get sharper.
According to Photozone's tests on the Sony A700,
the Tammy matches the resolution of the Zeiss ZA 24/2..

The Pentax FA 24/2 is also faster, and the A or K 24/2.8s are lighter.
11-19-2012, 11:14 AM   #34
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QuoteOriginally posted by snake Quote
The thing that worries me about the Tamron is that I read too much about focusing issues people have with them.
You can set a correction in the K-5.

11-19-2012, 11:52 AM   #35
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QuoteOriginally posted by lytrytyr Quote
You can set a correction in the K-5.
That, I know, and further reading says that it doesn't cure the focusing issues, particularly the problems where people say it needs different correction at different zoom ranges.
11-19-2012, 12:41 PM   #36
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QuoteOriginally posted by snake Quote
That, I know, and further reading says that it doesn't cure the focusing issues, particularly the problems where people say it needs different correction at different zoom ranges.
I have the Tamron 17-50, and mine required an AF fine adjustment. But it was just a simple -5 adjustment and that applies throughout the zoom range. It's fine.

If you're still worried about FF/BF issues, you can always go for the DA* 16-50 or Sigma 17-50/2.8 HSM.

There's also also the older Sigma 18-50/2.8 which came in two revisions, the latter of which is the Macro version which is supposed to be a bit sharper. They can typically be found used for a bit less than used Tamron 17-50s. For example: https://www.pentaxforums.com/forums/photographic-equipment-sale/198999-sale-t...-ex-macro.html
QuoteOriginally posted by lytrytyr Quote
You won't get sharper.
According to Photozone's tests on the Sony A700,
the Tammy matches the resolution of the Zeiss ZA 24/2..

The Pentax FA 24/2 is also faster, and the A or K 24/2.8s are lighter.
Well yeah that's why I have the Tamron!
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