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06-22-2010, 12:31 PM   #1
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Sony user to Pentax K7 -Need lenses

Hi all,
I learned a lot going through all the threads, but still need help. I will be receiving Pentax K7 tomorrow and need to purchase lenses.
I found a lightly used Pentax 55-130 lens, that I will most likely purchase or should I go for Tamron 70-200. I also can't decide whether I should purchase a Pentax 16-45 or a new Tamron 17-50 mm. Usually, I shoot my kids, parties and their recitals (piano, dance and violin) -no sports.
Any help is greatly appreciated.

ps:I have seen similar threads, but didn't find one specifically for Pentax K7...again not sure if the camera makes a difference. Thanks!

06-22-2010, 01:31 PM   #2
rkt
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The Tamron 17-50 2.8 is a great lens, sharp and value for money ... the benefits on a K7 could be that incase you notice any FF/BF issues then you could make adjustments for it... and it should possibly AF faster due to a stronger focus motor ... the 2.8 should help with indoor shots with kids and the parties ...
06-22-2010, 01:34 PM   #3
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Just my opinion, but the only lens I've noticed any difference with is my old version 1 kit lens. It's OK on the K100, but I don't like it on the K7. Get the lenses that will do what you need, regardless of camera.
06-22-2010, 01:42 PM   #4
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Pentax makes great prime lenses. Really great primes.

DA limiteds: (15, 21, 35, 40, 70) unbelievably sharp. Compact, fairly fast, quick focusing.

FA limiteds: (31, 43, 77) beautiful bokeh, faster than DA, full frame, extremely subjectively good lenses with occasional objective complaints such as purple fringing.

Check these lenses out first, IMO. These are the heart and soul of Pentax.

06-22-2010, 01:52 PM   #5
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If you are thinking or buying a fast telezoom, you might also consider sigma 70-200/2.8. Photozone gives it very high scores and i happen to agree. I guess it also depends on whether you want to go for very sharp tamron with the cost of a slightly slower focus or with sigma hsm which still produces very sharp images. Might also depend on the prices over where you live - here in finland they cost pretty much the same.
06-22-2010, 05:39 PM   #6
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Note there is no 55-130. You're either thinking of the DA* 50-135/2.8 or the DA 55-300. Neither really competes directly with the 70-200/2.8 - the 50-135 is a shorter focal length range, the 55-300 is much slower. If you're not doing sports, I can't see that the 70-200/2.8 would be on the list of lenses to consider. The 50-135 would be a good choice for recitals and so forth. And no, the camera you use shouldn't really have any effect on the decision - any discussion of lenses among people using other cameras are just as valid for you.

Last edited by Marc Sabatella; 06-23-2010 at 09:58 AM.
06-23-2010, 05:09 AM   #7
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Thanks for all your comments & suggestions! Yes, I meant 55-135 f/2.8 lens not the 55-300mm. Unfortunately, my budget doesn't allow prime lenses at this moment, although would add 50 mm (either Sigma or Pentax).
06-23-2010, 06:09 AM   #8
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(1) The 50-135 is a great lens, you'll love it. You should buy it.

(2) Tamron makes the 17-50 and 70-200 for Sony mount. Why would you sell Sony, buy Pentax, and then buy the same lenses you could have had in the old mount? (I'm not familiar with Sony, obviously you have a reason. I just want to know why you would switch if not for lenses.)

06-23-2010, 09:35 AM   #9
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Hi Aegon... Great Question. That's the question I debated for couple months. The Sony Alpha I have is few years old, and is not the fastest autofocusing camera. Also, I read a comparison of A700 and Pentax K7 and looks like K7 was superior than A700. My glass collection for Alpha was minimal, so I thought I should switch.
Now you got me thinking again....Hmmm
06-23-2010, 10:07 AM   #10
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QuoteOriginally posted by Bujji Quote
Unfortunately, my budget doesn't allow prime lenses at this moment
I wouldn't assume that. Maybe not a whole bag full of brand new AF ones, but if you go with MF primes, you can cover the focal length you want for a fraction the cost of the 50-135 or any other zoom with similar range (eg, Sigma 50-150).

For example, the M50/1.7 plus M85/2 plus M135/3.5 would run less than half the cost of the zoom and give you a very good spread of focal lengths. Replacing the M85/2 with a M100/2.8 would shift the spread to favor the telephoto side but bring the cost down to only a third or even a quarter of the zoom.

My own regular kit includes the DA40, DA70 and M135/3.5, and even this - a kit that includes two brand new "Limited" series lenses - runs no more than the zoom. Another option might be the new D-FA 100 Macro WR plus a 50 and perhaps 135 - and this too would come in at no more than the cost of the DA*50-135 or the Sigma 50-150, and it would give you macro and WR to boot.

Not saying any of this makes the prime kits a *better* choice than zooms, but assuming you aren't just dead set against primes on general principle, don't rule them out until you've actually checked out the options.
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