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10-06-2008, 01:18 PM   #1
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Experimenting with the Tamron 70-200 f2.8

I got the new Tamron just this morning and have been experimenting with it at 200mm f/2.8 in pretty low light conditions. With the ISO set at 200, some of these images took up to 3 seconds exposure. With the exception of the darkly stained door which was at the end of an unlit hallway, auto-focus was as fast as any lens I have with the K10D. The lens/camera did search on the door until I put the center focus circle on one of the cross sections where there was some contrast. (I suspect the Sigma would have done the same). Granted, a silently focusing lens would be nice, but as long as the auto-focus is fairly quick and accurate, I can put up with the noise. I think I'm going to be satisfied with this lens. (Obviously there's no art involved in these pics. I'm posting them in the hope that they may help others faced with the same decision I was. I should point out that all of these were shot in RAW and converted in Lightroom with no sharpening or other modifications other than cropping.)

CN


Last edited by Clem Nichols; 11-24-2009 at 10:24 AM.
10-06-2008, 01:26 PM   #2
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3 seconds HANDHELD! dang!

I'm pretty sure the Canon 70-200mm f/2.8 L IS USM couldn't handle that
10-06-2008, 01:27 PM   #3
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A few more with the Tamron at 200mm f/2.8

I'm attaching a 100% crop of the door image in the previous post and also a couple of images which were exposed at 2 seconds, which gives you some idea of the low light conditions in which the Tamron's auto-focus was working perfectly. As others have previously pointed out, the secret to low-light auto-focusing is to use the center focus and find a vertical or horizontal line with some contrast in it.

CN

Last edited by Clem Nichols; 11-24-2009 at 10:24 AM.
10-06-2008, 01:29 PM   #4
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QuoteOriginally posted by egordon99 Quote
3 seconds HANDHELD! dang!

I'm pretty sure the Canon 70-200mm f/2.8 L IS USM couldn't handle that
Hey, I have to confess. These were made on a tripod. I didn't want to let any unsteadiness on my part to interfere with my evaluation of the lens' focusing ability in low light.

CN

10-06-2008, 01:39 PM   #5
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The balls & the basket look great, good job. Any chance you'll get outside today for some test shots?
10-06-2008, 01:45 PM   #6
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I've heard that 135mm is the problem area for the Tamron, care to shoot a few in that vacinity?
10-06-2008, 03:11 PM   #7
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Glad to accomodate you. The attached images were all made at 135mm f/2.8. I'm not an expert pixel peeper, but they look pretty good to me. I figure if the lens performs well at f2.8, it will only do better with a smaller aperture. Again, all of these images were shot RAW and converted and cropped in Lightroom with no further sharpening or other editing. I was a little reluctant to choose this over the Sigma, but so far I've been very satisfied with it.

CN

Last edited by Clem Nichols; 11-24-2009 at 10:24 AM.
10-06-2008, 03:14 PM   #8
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A crop from the magnolia image and a couple of more:


Last edited by Clem Nichols; 11-24-2009 at 10:24 AM.
10-06-2008, 04:53 PM   #9
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wow very nice...i have a 50-135mm on its way and i want this lens too...those 100% crops are very nice.
10-07-2008, 05:47 AM   #10
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Nice to see makes it harder to choose between Sigma-Tamron


cheers
10-07-2008, 01:35 PM   #11
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QuoteOriginally posted by Clem Nichols Quote
Glad to accomodate you. The attached images were all made at 135mm f/2.8. I'm not an expert pixel peeper, but they look pretty good to me. I figure if the lens performs well at f2.8, it will only do better with a smaller aperture. Again, all of these images were shot RAW and converted and cropped in Lightroom with no further sharpening or other editing. I was a little reluctant to choose this over the Sigma, but so far I've been very satisfied with it.

CN
Thank you very much for the test shots!

I'm still toying between these lenses and they both seem to hold their own.
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