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03-04-2011, 06:07 AM   #1
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is it worth to spend 700 pounds on this ?

so ,is it worth to spend 700 pounds on a Pentax 16-50mm F2.8 DA* ED Lens for use with a PENTAX K-r ? this would be like a massive upgrade to the standard lens ,but is it worth it ... how would the k-r handle it ? or is it to much for the k-r ?

and another thing ...the 16-50 has a large diameter ,is 77 mm ..is it designed to work with larger sensors or the k-r will handle it ?

03-04-2011, 06:12 AM   #2
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The 16-50 is designed for all APS-C K-mount dSLRs with SDM capability (all dSLRs from K10D onwards). No problems with the K-r. It's also not 'too much' for the K-r, but it may be too heavy for your liking if you're used to the 18-55. But the improvement in image quality is like night and day. Not sure what a good price for it is in your part of the world, but from the US, it can be acquired for $750 (Amazon.com: Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras: Camera & Photo).

Hope this helps.
03-04-2011, 06:20 AM   #3
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or have a look at the Tamron 17-50 F2.8 as an alternative, much cheaper and also very good image quality (however, I don't have both, so I can't compare).
03-04-2011, 06:22 AM   #4
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As Ash said ... night and day IQ wise. However I'd also consider the Tamron 17-50/2.8 - another lovely piece of glass, almost the same IQ wise (and beats it out in some areas) for a lot lot less.

03-04-2011, 06:22 AM   #5
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QuoteOriginally posted by doozer Quote
or have a look at the Tamron 17-50 F2.8 as an alternative, much cheaper and also very good image quality (however, I don't have both, so I can't compare).
Beat me to it by 2 mins
03-04-2011, 06:32 AM   #6
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thanks for the answers ,but now i have another dilemma ... what is the difference between Pentax 16-50mm F2.8 DA* ED and Tamron 17-50/2.8 which is half the price of the first one ..what is the difference ... it must be some important things ,i really don't believe in santa
03-04-2011, 06:53 AM   #7
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The DA* has faster, quieter autofocus and better construction that seals it from the weather.
the Tamron does not.
03-04-2011, 07:36 AM   #8
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QuoteOriginally posted by uptheriver Quote
The DA* has faster, quieter autofocus and better construction that seals it from the weather.
the Tamron does not.
I'm not at all sure it's faster - not that it really matters in a primarily landscape / architectural lense. It's SDM - not renown for being fast, in fact quite the opposite. However SDM is all but silent - something I love in my new *300 for birding but not that relevant again for the intended uses of the focal length in question.

Both lenses have their advantages, in some areas the Tamron wins out and in others the Pentax does. Please take a look at these thread I started before I made my decision (in the end I chose the Tamron, but if the Sigma was substantially less than the Pentax, and available at that time (it wasn't) I would have gone for the Sigma
:-

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/125517-da%2A-1...n-17-50-a.html

03-04-2011, 08:17 AM   #9
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QuoteOriginally posted by uptheriver Quote
The DA* has faster, quieter autofocus and better construction that seals it from the weather.
the Tamron does not.
just for reference, the K-r does not either

Last edited by Pablom; 03-04-2011 at 08:33 AM.
03-04-2011, 10:53 AM   #10
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If you are going to spend, do it on your lenses.

There is the whole SDM issue though, there is a way around that. Buy it with American Express card or something so you get the extra year warranty on the lens and plan on keeping the lens for a long while. I bought insurance on my gear ($2500 worth of coverage, $0 deductible) for $60 per year. I feel this is something everyone should do if they are worried about SDM failures. If the SDM ever breaks, I'm covered.

If you know you will be doing photography for a while, I would advise investing in the better lens (the DA*) and you will have it when you update your body later on. This way you have the best quality for the longest time.

I'm sure the Tamron is good too, but the DA* is the better lens optically and build wise.
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