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Old Mar 20, 2010, 10:08 PM   #1
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Default Lens & TC test

I took the Sigma 300mm 2.8 EX APO with a Sigma 1.4 EX APO DG teleconverter out for a bit at the park today to test the combination. With the weather going back to below freezing today, this was the only live subject I could find for a test shot way up in a large Oak tree.



Here is a crop of the shot which I thought showed that the combination of the TC and the Sigma lens works pretty good.



Tom

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Old Mar 21, 2010, 9:14 AM   #2
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It does look very good - very sharp. Some CA on one branch, but not much and it would be easy to correct.

So you are below freezing and I was way too hot yesterday wearing a long sleeved T-shirt.
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Old Mar 21, 2010, 11:44 AM   #3
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Looks pretty good. My best TC combo is the Pentax DA* 300mm with Pentax FA 1.7X Adapter. Acts as focus limiter also.

Ed
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Old Mar 21, 2010, 6:43 PM   #4
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Looks promising Tom. so Far my tries with Tc's haven't been to successful.

Ed, Nice shot of the Hawk! turned out better than mine did yesterday but, still good enough I'm going to post it anyway.
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Old Mar 21, 2010, 8:32 PM   #5
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Looks like a really nice combination Tom. Very nice sharpness in that tight crop.
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Old Mar 22, 2010, 1:00 AM   #6
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The same TC seems to work very well with the Sigma 70-200mm 2.8, also, with very little loss of sharpness, which has not been my experience with TC's before.

Very nice shots with the AF1.7, I know with mine, the focus limiter helps with the focus speed quite a bit and mine really shines with a MF high speed lens such as the A* 85mm 1.4.

Tom
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Old Mar 22, 2010, 5:49 AM   #7
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Sure looks like a keeper!
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Old Mar 22, 2010, 7:35 AM   #8
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Actually I wasn't very keen on teleconverters but your crop in which one can count the hair on the squirrel's back is persuasive for me : )
Btw, I should also say I found the crop with the hawk and the foliage around, submitted by Ed quite impressive.
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