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Old Jan 16, 2007, 8:37 PM   #1
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I currently have the 18-55mm kit lens as well as a Sigma 70-300mm DG APO macro. Thinking of getting a Sigma 17-70mm f/2.8-4.5 DC IF Macro to replace my kit lens. Can anybody tell me how much better the image quality is compared to the kit lens? Thanks!

Jason
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Old Jan 17, 2007, 9:02 AM   #2
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I have both the kit lens and the Sigma 17-70mm lens. I like the 18-55 and have shot a lot of photos with it, but I LOVE the Sigma...it has better range..17-70mm and great macro capabilities. It is a superior lens and great walk about lens.


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Old Jan 17, 2007, 9:51 AM   #3
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The Sigma will give you about a 25.5mm - 105mm which is a great range and the MTF charts on the sigma site look great. How much is this lens gonna cost you?
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Old Jan 17, 2007, 10:39 AM   #4
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Hi whbroker and CptOfGondrr,

Thanks for your replay. After further research, I decided not to go for the Sigma 17-70mm at this moment. I saw a few pictures taken with this lens and I am not impressed by the image quality (I could be wrong though). I just found that Sigma is going to release a 18-200mm OS lens. I think I will probably go for this lens. For two reasons: 1) It covers the most commonly used focal range therefore it is a good walk around lens; 2) It has Optical Stabilization. The latter feature is a remedy for my K110D which lacks the SR function (I regret that I did not go for a K100D).

Have a nice day!

Jason




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Old Jan 17, 2007, 1:18 PM   #5
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SDell yours and get a K100D instead...makes a bit more sense than to splash out a ton on a OS lens that may not have decent image quality....then any lens u do have will be stabilized...makes perfect sense
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Old Jan 17, 2007, 1:43 PM   #6
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NatureAdmirer wrote:
Quote:
Hi whbroker and CptOfGondrr,

Thanks for your replay. After further research, I decided not to go for the Sigma 17-70mm at this moment. I saw a few pictures taken with this lens and I am not impressed by the image quality (I could be wrong though). I just found that Sigma is going to release a 18-200mm OS lens. I think I will probably go for this lens. For two reasons: 1) It covers the most commonly used focal range therefore it is a good walk around lens; 2) It has Optical Stabilization. The latter feature is a remedy for my K110D which lacks the SR function (I regret that I did not go for a K100D).

Have a nice day!

Jason



I seriously doubt that the OS lens will be available in Pentax mount, only the K10D has the power contacts to run such an option, and it already has SR.

Ira

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Old Jan 17, 2007, 3:53 PM   #7
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My Sigma 17-70 is miles better than my kit 18-55 lens in terms of quality of image. I couldn't believe how poor the kit lens was in comparison to my previous camera's lens on a x10 zoom Olympus C750, so I just had to get something better. It's sharp at all apertures, zero PF and focuses quick. Problems? No quick shift, hardly noticeable very slight red/orange cast easily tweaked out but nothing's perfect.
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Old Jan 18, 2007, 1:15 AM   #8
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These are taken with Sigma 17-70mm on K10D.

http://www.stevesforums.com/forums/v...mp;forum_id=80

Image quality seems a bit better than Sigma 18-125mmbut that is also good.
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Old Jan 18, 2007, 3:42 PM   #9
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SteveB wrote:
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My Sigma 17-70 is miles better than my kit 18-55 lens in terms of quality of image. I couldn't believe how poor the kit lens was in comparison to my previous camera's lens on a x10 zoom Olympus C750, so I just had to get something better. It's sharp at all apertures, zero PF and focuses quick. Problems? No quick shift, hardly noticeable very slight red/orange cast easily tweaked out but nothing's perfect.
Dont knock the lens. I and many others on dpreview have got some great results with the kit lens. Dont knock something just cos u might not have what it takes to get the best out of it!
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Old Jan 18, 2007, 5:44 PM   #10
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Hi Jason,

The Pentax kit lens is a very good lens. The Sigma 17-70mm lens is good also. But as far as the 18-200mm goes I would no go for it. The range of zoom is to great. I use a 28-200mm Sigma. For me it is right on the edge of the zoom range.

For my walk around general purpose lens I use a 28-70mm f4 Pentax. I shoot landscape mainly and have not felt the need to have anything wider than 28mm.

Learn the sweet spots and quirks of a lens before thinking that you need a better lens. Once you do you might amaze yourself at the results you get.

Rudy
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