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Old Apr 22, 2006, 10:12 AM   #1
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I am wondering whether to buya 18-55 and50-200 pentax lens set, or a Sigma 18-200mm, or a Sigma 28-300mm lens, and am not sure what would be best.

I take images of all kinds and at all distances, and am rather impatient, and would not really want to keep changing lenses all of the time.However I don't want to spend money on a lens that might be rubbish.

Can anyone advise or comment on the quality of the Sigma lenses (18-200, 28-200, and the 28-300mm)and advise me on what they think I should do?

I look forward to your replies, with many thanks.
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Old Apr 22, 2006, 11:32 AM   #2
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I was just about to post the following question when I see this post. I believe we are on the same train of thought.:-)



I have the Sigma 18-125 for my DL but I'm interested in a little more zoom when outside. I have been thinking about the Sigma 18-200 and the 28-300. With the 18-200 this could be a full time lens but I'm not sure the 200 zoom end would satisfy my needs. With the 18-125 & the 28-300 I think I would better cover the range. If you have the 18-200 or the 28-300 could you please share your opinions. I also know that the aperture of the 18-125 is f5.6 and the aperture of the 18-200 & 28-300 is f6.3 so using the 18-200 would not be as good in lower light situations if used as a full time lens. Also the 28-200 is a third option do to cost, about $145.00 difference. Thanks
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Old Apr 22, 2006, 1:48 PM   #3
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DON'T buy the Sigma 18-200mm as it doesn't focus accurately beyond 135mm - I know I've read the reviews & tested & tried it out first hand with just the stated results.

BUY the Pentax 50-200mm DA - it knocks spots off the Sigma within that range.

The Pentax 18-55mm DA is on a par with the Sigma within that range so with both you've got the equivalent range with superior results albeit with having to change lens.

Trawl back through previous threads & you'll see a lot of discussion with sample shots or visit http://www.dcresource.com/forums/showthread.php?t=16849
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Old Apr 22, 2006, 1:52 PM   #4
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18mm Test
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Old Apr 22, 2006, 1:53 PM   #5
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55mm Test
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Old Apr 22, 2006, 1:54 PM   #6
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135mm Test
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Old Apr 22, 2006, 1:55 PM   #7
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Sharpness Test
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Old Apr 22, 2006, 1:57 PM   #8
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18mm Bottom Right Corner Test
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Old Apr 23, 2006, 11:37 AM   #9
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After seeing the test examples I think I'm going to give the Pentax 50-200 a try for my longer zoom. Thanks for the demo.
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