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Old May 14, 2010, 2:10 AM   #1
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Default Testing My K-x and old sigma 70-300mm DL

Please be kind enough to give your advice
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Old May 14, 2010, 2:28 AM   #2
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Handheld @300mm Autotone from PS
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Old May 14, 2010, 2:33 AM   #3
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Handheld @300mm
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Old May 14, 2010, 4:15 AM   #4
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The sigma looks a little soft at full zoom compare to the pentax 55-300 at full zoom. But stopping down may help it.
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Old May 14, 2010, 4:19 AM   #5
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Here are some K-x shots with the pentax kit lens dal 55-300mm, it was stop down. The exif data is in the photos.

http://forums.steves-digicams.com/wi...birds-nyc.html
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Old May 14, 2010, 7:05 AM   #6
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Nice shots shoturtle, I knew that it was soft @ 300mm, and am trying to get enough money to go for a DA55-300mm. But I'll have to be satified with sigma for a while
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Old May 14, 2010, 8:38 AM   #7
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This lens produces a nice bokeh, quite creamy without artifacts. Lots of CA in the high contrast shot though. You nailed the focus in the first shot - lovely yellow Lab !
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Old May 14, 2010, 10:21 AM   #8
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Regarding pic no2, Here is the one without autotone from PS
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Old May 14, 2010, 11:32 AM   #9
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Much less CA in that last one. I too am looking forward to a 55-300. I have the 100-300 Sigma DL and it is adequate but not spectacular. At the 100mm end it does well enough but at the 300mm end it is slightly soft and has some CA in high contrast areas. Also has a bit cooler color rendition than I like. I like that first shot a lot. Was this on an overcast day?
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Old May 14, 2010, 3:31 PM   #10
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Hi Chesslanka,

If you're looking for and evaluation of the lens/camera, I'd say that they did well guaging the exposure and you did well getting the shots with good focus and capturing the dog's gentle personality. The PF isn't bothersome IMO, and could easily be corrected, but it could get bothersome with higher contrast situations. Sharpness and resolution appear easily good enough to give you a strong base for additional PP if you wish to enhance it further, but IMO this isn't really needed. A bad lens can't be helped much with PP.

If you're looking for a photographic critique, I started writing one, but then realized that you might not be looking for this. I'll post it or PM you with it if you'd like.

If you like to shoot long telephoto FLs, you can get better-performing lenses than this, but this lens looks to be very competent with your Kx, and the better alternatives can get expensive very quickly. The increments in price get dramatically out of proportion to the improvement in performance. I'm very opinionated in the subject of tele lenses for Pentax. . .

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