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05-02-2009, 07:35 PM   #1
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Tammy vs. Sig vs.Pentax f2.8

I got my Pentax 16-45. I want a faster zoom now.

The Pentax 16-50 is ideal. Heard there are many bad ones out there.

The Sig 18-50 is next on the list.

And then there is the Tammy 17-50.

What do you guys think?

05-02-2009, 07:45 PM   #2
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QuoteOriginally posted by res3567 Quote
I got my Pentax 16-45. I want a faster zoom now.

The Pentax 16-50 is ideal. Heard there are many bad ones out there.

The Sig 18-50 is next on the list.

And then there is the Tammy 17-50.

What do you guys think?
If you want very good performance at f/2.8 or bigger aperture, buy a pancake or DA* 55 (if you have the cash). DA 16-45 is sharper at f/4 than DA* 16-50 at f/4--at least based on photozone.de tests. Unfortunatelly, photozone didn't test the Tamron or the Sigma fast zooms on a Pentax body.
05-02-2009, 08:44 PM   #3
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QuoteOriginally posted by asdf Quote
If you want very good performance at f/2.8 or bigger aperture, buy a pancake or DA* 55 (if you have the cash). DA 16-45 is sharper at f/4 than DA* 16-50 at f/4--at least based on photozone.de tests. Unfortunatelly, photozone didn't test the Tamron or the Sigma fast zooms on a Pentax body.
Oh? That is a pancake? Wow! I did not know that. I am stuck on the very old and recently old lenses.
05-02-2009, 08:45 PM   #4
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QuoteQuote:
Tammy vs. Sig vs.Pentax f2.8

--------------------------------------------------------------------------------

I got my Pentax 16-45. I want a faster zoom now.

The Pentax 16-50 is ideal. Heard there are many bad ones out there.

The Sig 18-50 is next on the list.

And then there is the Tammy 17-50.

What do you guys think?
I own the Tamron 17-50 and love it. It is already sharp wide open, and extremely sharp by f4--it has great contrast and colors too. There are 3 shots out of the 5 here https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/59021-2-tamron...m-vs-90mm.html which were taken with the 17-50 Tammy. You can get a good idea of what the lens can do here. Let me know if you have any other questions about it or if you want more pics--thanks.

05-02-2009, 08:49 PM   #5
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QuoteOriginally posted by Jewelltrail Quote
I own the Tamron 17-50 and love it. It is already sharp wide open, and extremely sharp by f4--it has great contrast and colors too. There are 3 shots out of the 5 here https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/59021-2-tamron...m-vs-90mm.html which were taken with the 17-50 Tammy. You can get a good idea of what the lens can do here. Let me know if you have any other questions about it or if you want more pics--thanks.
Your ears must have been burning Jewel! I just saw that! Wow!
I think the Tammy is the best compromise between the Pentax and the Sig because of the range and reputation. I want to use for event photography with a flash. What do you think?
05-02-2009, 08:50 PM   #6
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QuoteOriginally posted by res3567 Quote
Oh? That is a pancake? Wow! I did not know that. I am stuck on the very old and recently old lenses.
Heh. I meant DA 40 or 70 limited.

"or" DA* 55. A pancake "or" DA* 55. Alright?
05-02-2009, 09:22 PM   #7
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QuoteOriginally posted by asdf Quote
Heh. I meant DA 40 or 70 limited.

"or" DA* 55. A pancake "or" DA* 55. Alright?
My Bad. I misread your post. You ment a DA 55 or a pancake. I really don't know to much about the new 55.
05-02-2009, 09:28 PM   #8
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QuoteOriginally posted by res3567 Quote
My Bad. I misread your post. You ment a DA 55 or a pancake. I really don't know to much about the new 55.
There was a poster here who did a fairly detailed test soon after it came out. From his charts, it was an improvement over the FA 50, at large apertures. He did complain about the focus speed. Of the three lenses I mentioned (DA 40, 70 and DA* 55), I've only had the pleasure to use DA 40 f/2.8 before I passed it on to someone in need of a good inconspicuous AF prime.

05-02-2009, 09:47 PM   #9
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QuoteOriginally posted by asdf Quote
There was a poster here who did a fairly detailed test soon after it came out. From his charts, it was an improvement over the FA 50, at large apertures. He did complain about the focus speed. Of the three lenses I mentioned (DA 40, 70 and DA* 55), I've only had the pleasure to use DA 40 f/2.8 before I passed it on to someone in need of a good inconspicuous AF prime.
You are a good person for that. So your take on the DA 40?
05-02-2009, 09:50 PM   #10
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QuoteOriginally posted by res3567 Quote
You are a good person for that. So your take on the DA 40?
It was sharp wide open (f/2.8) and focused very fast--the motor has to drive something very small, after all. Maybe, at f/2.8, it's not fast enough for you, though.
05-02-2009, 10:36 PM   #11
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QuoteQuote:
Res3567: Your ears must have been burning Jewel! I just saw that! Wow!
I think the Tammy is the best compromise between the Pentax and the Sig because of the range and reputation. I want to use for event photography with a flash. What do you think?
I have not used flash, ever, with any lens. But I have shot the 17-50 lens in low light and it is excellent, especially on the K20 where I feel good bumping up ISO. It really is an awesome lens. I think, and so do others, that it is at least as good as the Da 16-50. It certainly is better than the Da wide open--no doubt!
05-02-2009, 10:41 PM   #12
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QuoteOriginally posted by Jewelltrail Quote
I have not used flash, ever, with any lens. But I have shot the 17-50 lens in low light and it is excellent, especially on the K20 where I feel good bumping up ISO. It really is an awesome lens. I think, and so do others, that it is at least as good as the Da 16-50. It certainly is better than the Da wide open--no doubt!
How about for shooting weddings?
05-02-2009, 10:49 PM   #13
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I had the 16-45 and now I have the 16-50....but I bought a catseye at the same time and now my pics don't seem to be in focus close up..... I wish I still had the 16-45 to compare....
05-02-2009, 10:59 PM   #14
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res3567: How about for shooting weddings?
It is an excellent indoor lens, so it would do well for weddings too. I personally do not shoot weddings, but have shot indoor events. White balance becomes the tricky thing at some indoor events.
05-02-2009, 11:06 PM   #15
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smc: I had the 16-45 and now I have the 16-50....but I bought a catseye at the same time and now my pics don't seem to be in focus close up..... I wish I still had the 16-45 to compare....
Do you mean you bought a Katze Eye when you bought a 16-50 and the focus screen will not allow in-focus shots at close range? Can you post some of the shots you are referring to? How close are we talking about here?

Are you talking about using auto focus or manual focus? Auto focus is not affected by the focus screen.
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