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07-06-2009, 11:03 PM   #1
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Best lens to replace kit lens? Upgrading from K10 to K7.

I just upgraded from a K10 to a K7. I had the kit lens with the K10 and for most purposes, it sufficed. However, I want to upgrade the lens as well.

I've been eyeing the
sigma 18-50 f2.8 ($419.00),
sigma 17-70 f2.8-4.5 ($369.00),
pentax 17-70 f4.0 ($509),
pentax 16-45 f4.0 ($340),
pentax 16-50 f2.8 *DA ($690... but $100 rebate from Pentax for buying the K7)

Please let me know other options if there are any.

I am looking to replace the kit lens and look for a lens that's better in low light. I already have the pentax 1.4f 50mm, but am looking for a zoom lens that can handle wide as well. I am looking at the pentax *da, but i don't know if I can justify the high price premium and plus, I have heard it is HUGE... so it might be a pain to carry around. I travel a lot and so it might be a pain to carry around everywhere. I think all the other lenses are much smaller.

Please advise. Thanks!

07-06-2009, 11:21 PM   #2
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the DA* should be the runaway winner coz it matches perfectly well with the K-7. you got the speed (lowlight) and zoom range (wide to standard) that you were looking for. but ultimately, the weather-sealed feature made it the runaway choice. that's hard to ignore.
07-07-2009, 01:52 AM   #3
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You can't go wrong with the Sigma 18-50 F2.8 macro, it's a very good lens.
And from F4~4.5 it's very sharp across the field, I can highly recommend it!

Mike
07-07-2009, 02:04 AM   #4
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Pentax 17-70 f/4 is a perfect glass..

07-07-2009, 02:13 AM   #5
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DA* 16-50 best choice... stellar lens and weather sealed like the K-7

My favourite zoom


Neil
07-07-2009, 02:59 AM   #6
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DA*16-50mm is the best choice but the DA16-45mm is smaller and sharp from wide open so it can basically come a close second to the DA*. It's smaller in diameter but not much shorter. I had the DA and upgraded to the DA* after a year. Optically they are both excellent. I can't comment on the 17-70mm but it has a nice range and the few reports we have are that it's a very good lens. Actually they all are but the DA* is the class leader. So it's a choice between size, speed and price.

Last edited by Peter Zack; 07-07-2009 at 07:49 AM.
07-07-2009, 04:58 AM   #7
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I've always been a buy the best lenses you can afford guy, and then purchase last years body. The bodies always seem to drop fast, whereas the lenses don't. I just switched over from Olympus. I could have waited and bought the K7, but that would have left me with a limited lens budget.

I kept my Olympus E-1 from 2003/2004 that is only 5mp. When combined with some of Olympus' high grade lenses, I can still maximize resolution and get the prints I need.

In any event, my point is unless the K7 has something to offer that can specifically benefit your photography now, I think you would be better served by a few higher end lenses. While the kit lens is very good, if you have been shooting exclusively with that lens, you have probably barely touched the capabilities of the K10D.


To answer your question, if money was no object, I'd buy the 16-50 to exploit the weather sealed abilities. Otherwise, I'd go for the 18-50. If 50 isnt long enough, consider the Sigma 24-70 EX Macro. I did because I am typically at the longer end and knew I would be adding a wide.
07-07-2009, 06:31 AM   #8
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QuoteOriginally posted by Peter Zack Quote
DA*16-50mm is the best choice but the DA16-45mm is smaller and sharp from wide open so it can basically come a close second to the DA*. It's smaller in diameter but not much shorter. I had the DA and upgraded to the DA* after a year. Optically they are both excellent. I can't comment on the 17-70mm but it has a nice range and the few reports we have are that it's a very good lens. Actually they all are but the DA* is the class leader. So it's a choice between size, speed and price.
I agree...I started with the DA 16-45 and was quite surprised on what this lens produced....if you are on a budget, it would be my choice. I have the DA* 16-50 now and it is a better lens with some additional features but it's expensive and I'm not convinced it's "that much" better. The 16-45 might now focus faster on the K-7 than the 16-50. (?)


Last edited by Peter Zack; 07-07-2009 at 07:48 AM.
07-07-2009, 08:22 AM   #9
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QuoteOriginally posted by swhang Quote
I just upgraded from a K10 to a K7. I had the kit lens with the K10 and for most purposes, it sufficed. However, I want to upgrade the lens as well.

I've been eyeing the
sigma 18-50 f2.8 ($419.00),
sigma 17-70 f2.8-4.5 ($369.00),
pentax 17-70 f4.0 ($509),
pentax 16-45 f4.0 ($340),
pentax 16-50 f2.8 *DA ($690... but $100 rebate from Pentax for buying the K7)

Please let me know other options if there are any.

I am looking to replace the kit lens and look for a lens that's better in low light. I already have the pentax 1.4f 50mm, but am looking for a zoom lens that can handle wide as well. I am looking at the pentax *da, but i don't know if I can justify the high price premium and plus, I have heard it is HUGE... so it might be a pain to carry around. I travel a lot and so it might be a pain to carry around everywhere. I think all the other lenses are much smaller.

Please advise. Thanks!
The Pentax 17-70mm f/4 also has a $90 "rebate".
And I'd say it really depends on your existing lens collection. If you have anything to cover past 50mm, then the 17-70mm might be a great cheaper option. Also reccomend the 17-50mm from Tamron. From what I hear it is an amazing lens.
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