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11-20-2009, 02:37 AM   #1
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Help with lens selection

OK. Thanks for the advise in a previous post about scene modes. I have decided to go ahead and buy the K7. Now I have to choose the lenses. Again the use is mainly taking photos of the kids at home, at play, and on holiday. Prices taken from Amazon. My knowledge of modern lenses is limited especially as to choosing being Pentax, Tamron and Sigma. I would call my budget moderate. I cannot afford the best, but I do want good quality that will last me for a long time. I have tried to choose lenses in that budget band with a lower f stop for broader use.

The main lens should be a good all-arounder. The options I came up with were:
Pentax 17-70 DA f4 $480.00
Sigma 17-70 2.8-4.5 DC macro $450.00
Pentax 18-250 f3.5-6.3 $338.00
Pentax 18-55 WR f/3.5-5.6 free with camera or trade for SD card
I am leaning towards the Sigma 17-70

Then our kids do a lot of sports - Basketball and soccer. Because they are young we can be right on the sidelines. My choices here were:
Pentax SMC DA* 50-135 f/2.8 $820.00
Tamron AF70-200 f/2.8 $769.00
Sigma 70-200mm f/2.8 DG HSM $780.00
SIgma 70-300 F/4-5.6 DG $400.00
I am leaning towards the Sigma 70-200 f/2.8

Then I would like a good low light lens for at home for Xmas photos and birthday photos. The best options I thought would be the
Pentax DA 40mm f/2.8 $390.00
Sigma 30mm f/1.4 DC $439.00
Pentax SMCP FA 35mmf/2.0 $500.00
leaning towards the Sigma (again!)

And I think that would cover all of my immediate needs until I get a better wide angle perhaps. These are just the lenses I found and I appreciate any suggestions....

11-20-2009, 03:25 AM   #2
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Wow - a comprehensive overview of your needs.
I think you've summed it up well.
To me the all rounder is better served by a DA* 16-50 or the Tamron 17-50, then perhaps the DA 17-70.
Sports, it would be the Tamron 70-200 - if you can prepare yourself to send it back for a sticky aperture repair...
Low light, f/2.8 isn't enough to me. It would have to be the FA 50 f/1.4 or Sigma 30 f/1.4

Enjoy lens hunting!
11-20-2009, 06:39 AM   #3
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I was not totally impressed with the Sigma 17-70, although it is an appealing focal range. I guess that's why Pentax came up with one!

I would also check out the Tamron 17-50 f/2.8, and maybe the Sigma 18-50 f/2.8. I have not had the best luck with Sigma lenses, but the Tamron's I have used have been pretty outstanding.

For a low-light lens, you might also think about the Pentax FA 50mm f/1.4, which is really one of their very best, sharpest lenses.

If you are on a budget, you can pick up some used manual focus lenses too, at least to get a feel for the focal lengths you use most.
11-20-2009, 08:17 AM   #4
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Yes that 17-70 is an appealing range for daily use. Want to avoid changing lenses when taking general photos. And once i have that then I can get an idea of the focal length of most benefit.

Nice photos on your page - we make a point to try to avoid the battery driven toys now.


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