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Old Jul 29, 2004, 8:57 PM   #1
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Had a number of requests for more pics of stacking. This was taken w/ a 10D, Sigma 120-300 f/2.8, and stacked 1.4 and 2.0x Sigma TCs. 1x sharpen in PS w/ a slight crop, that's it.















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Old Jul 29, 2004, 11:45 PM   #2
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Nice shots !

Love them ..... very sharp.


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Old Jul 30, 2004, 7:27 AM   #3
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great shots, nice and crisp.
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Old Jul 30, 2004, 8:01 AM   #4
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It was fun to shoot these. My focus point was the very top of the hill. That first picture is just a little soft. If you look, he's just a little past the crest of the hill. Considering the speed of these things, even head on, it wasn't easy to get a shot that was nice and crisp. The stacking kind of compunds thesharpnessissue as well. Already looking forward to next year.
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Old Jul 31, 2004, 2:16 PM   #5
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Wow nice shots I guess I did not know you cold stack TC's I have one tamron 2x. When you stack two do you loose twice the stops? Thanks .... Dale
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Old Jul 31, 2004, 5:42 PM   #6
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The 120-300 f/2.8 becomes an 840mm f/8 or so. For me it works. Am I going to get nice sharp, crisp pictures. Nope. But, it's going to get me shots I never would have gotten in the first place. Some of them are pretty sharp,but most of them need a little PS sharpening. I'm quite content doing that.
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Old Aug 1, 2004, 8:08 AM   #7
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It looks like this lens is a keeper:

1. No one makes a 120-300 f/2.8 zoom
2. The EF 300 f/2.8 L is slighly better, but then it costs slighly more
3. ... the Sigma 100-300mm F4 EX IF HSM is also slighly better, but it costs a lot less :-):-):-)
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Old Aug 1, 2004, 1:35 PM   #8
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Sharpening is no problem, I am on monopod most of the time any way, what will the factor mm be on a nikon 80-200 f2.8 d with 2 2x tamron converters? Thanks Dale



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Old Aug 1, 2004, 2:32 PM   #9
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I'm not sure if you can stack 2 - 2x's together. One of the elements might stick out too much. Something to check on. With your 200, you'd be at 800mm and about f/11-12.
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Old Aug 1, 2004, 5:04 PM   #10
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Ok thanks I will check into that...What would stick out? The elements? are they different on a 1.4x?
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