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04-20-2007, 11:00 AM   #1
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Sigma 70-300 APO DG on K10D

I've just spent the last hour or so playing with this new lens. I shot several bird pictures at 300mm, f/6.7 and ISO 400, most of them in indirect light. When blown up 50% and viewed on my 17 inch computer screen I'm very pleased indeed with the sharpness of the images. Maybe I'm just easily pleased, but I'm certainly happy with my purchase. With this lens, my equally new Sigma 17-70 EX DC, and my K10D I feel that I can now only blame myself for the quality of my pictures.

04-21-2007, 08:04 AM   #2
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I've been back and forth on this lens, between it and the Pentax 50-200 I'm not sure what to get! It'll probably be a gametime decision. This is the one that is f/4-5.6, right? How long are your shutters at 300mm, f/6.7 and iso 400?
04-21-2007, 01:38 PM   #3
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Shutter speed varied from 1/125 to 1/2000 of a second depending on the light. As stated in my original post, most of the pictures I took were in indirect light. Even at 1/125 and 300mm I had no trouble hand-holding the camera thanks to the K10D's shake reduction. I can't speak for the DA50-200 because I have no experience with it, but so far I'm very satisfied with the Sigma 70-300. At 300mm, manual focus (which was necessary to use because the birds I was photographing were sitting in trees, and the branches confuse the auto focus) was very touchy with only a very few degrees of rotation (and I mean a VERY few like one or two) bringing the picture into (or out of) focus. I have a trip to Africa with a visit to a game park in Kenya coming up next month, and wanted to get as much telephoto as I could for the money.
04-21-2007, 03:21 PM   #4
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Ah! Sigma 17-70 and 70-300! Very niccee!

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