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07-30-2009, 12:35 AM   #1
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What lens to compliment my Sigma 10-20?

I shoot landscapes almost exclusively and mostly with my Sigma 10-20. I also have a Sigma 18-125 (kit lens) which I am planning to sell with my K100. I was thinking of keeping it but after some test shots on the K20 I don't think it is up to standard with that camera. I really need another top class lens (professional quality) that doesn't "overlap" the 10-20 range but can give me a bit more reach when needed. I am not into big zooms (found the 18-125 more than adequate) so am looking for for suggestions, either a zoom (16-50, 50-135?) or a prime suitable for landscape work that meets the above criteria. Don't want much do I? My budget is about $1,000 AUD, if it was more I would just get all of them!

07-30-2009, 12:47 AM   #2
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What did you think about getting the Sigma 18-125 over the 17-70? I always wanted the 17-70 but thought the Sigma with extra zoom would help. But all the praise about how good the 17-70 is leaves me a little bit curious since I never hear people talking about the 18-125.
07-30-2009, 01:57 AM   #3
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The 18-125 came with the K100 and was quite well suited to that camera. It has good reviews but I think it is only typically kit lens standard. The amount of zoom is terrific, no complaints there just not up to the IQ of the K20 in my opinion. I have considered the 17-70 considering the reviews but was thinking of even better quality.
07-30-2009, 02:13 AM   #4
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if you don't want overlap then have a look at either Sigma 24-70/2.8 (there are 2 versions: new with HSM and old withou it,, and I think they are opticaly bit different too) or Tamron 28-75/2.8. Both of these should be top class lenses. If you want prime: I thik DA21 is too close. That leaves u with various 24s (Pentax A or FA*, Sigma 24/2.8 - AF or MF version, Sigma 24/1.8) or you could get FA31ltd. It's bit of a jump from 20 in terms of FOV, but lenses don't get much better than that.
So as you can see there is quite a few options with your budget. But which of those you'll be able to find, that's another issue...

BR
Peter

07-30-2009, 02:33 AM   #5
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QuoteQuote:
Pentax A or FA*, Sigma 24/2.8 - AF or MF version, Sigma 24/1.8) or you could get FA31ltd
Can get the FA 31 Ltd for $1280 AUD or the FA 43 Ltd for $748 AUD...why such a big price difference?
07-30-2009, 02:58 AM   #6
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QuoteOriginally posted by ozlizard Quote
Can get the FA 31 Ltd for $1280 AUD or the FA 43 Ltd for $748 AUD...why such a big price difference?
Probably th 49mm to 58mm lens diameter. I have both and IQ is tops for both. Interestingly the 43mm ltd reversed is a great macro lens.

David
07-30-2009, 06:25 AM   #7
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If you are considering a zoom, and as you say you don't want overlap, why not look at one of the following 3 lenses.

Sigma APO 24-60 F2.8 EX DG
Sigma APO 24-70 F2.8 EX DG
Tamron XR Di 28-75 F2.8

When the tamron was released it was reported as the best of the three in optical performance, but leaves you with the biggest gap between your 10-20mm, and with a 67 mm front end leaves you with a need for additional filters.

The sigma 24-70 uses a huge 82mm Filter and the lens is quite heavy
the 24 - 60 has the least reach of the three but uses the same filter as your 10-20 (77mm)

I have the tamron lens, and can't fault it, however the sigma lenses seem to have a slightly better "feel" when you are using them, this is a subjective point more than anything, but it gives the impression that mechanically the sigmas are better.

For me, to bridge the gap, it I need to, I have a SMC FA-J 18-35 F3.5-4.5 which came with my *istD as the kit lens. This was part of the reason for going with the Tamron, as the tamron would be the third lens I had with a 67 mm filter, and I already had 2 different graduated ND filters and a polarizer at that diameter.
07-30-2009, 03:07 PM   #8
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You haven't exactly said what you intend to shoot with the new lens. I can recommend the DA*16-50 which has the same filter diameter as your 10-20 and the IQ is excellent but there's a bit of distortion at the wide end. I don't know about the DA 17-70 although I've read some good things about it. Pentax hasn't yet filled in the gap between the DA 15 and DA 35 but there are some good used 24's & 28's out there if you want a prime lens.

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