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Alternative Imaging Methods
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Old July 23rd, 2008, 04:30 AM   #16
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Join Date: Dec 2003
Posts: 4,437

Here is a link to a test I did with the Sigma 50mm-500mm f4-f6.3 zoom.


There is some artifacting visible in the sky areas at the f6.3 end of the zoom range however it is not too intrusive. I use this combination to enable me to get close enough to pick up control surface movements. You can observe the elevators rise just before the point of lift-off.

Last edited by Bob Hart; July 23rd, 2008 at 04:33 AM. Reason: added text
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Old July 24th, 2008, 03:44 AM   #17
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Join Date: Apr 2007
Location: Berkshire, UK
Posts: 390
I shot my most recent UWOL entry with the Letus, and I have to say I was pretty happy with the results. Utilising some really strong sunlight I got away with using a 2x extender on a 70-210mm lens, which got me quite close in for some shots of birds. Looking to pick up a 400mm prime and have a play with it too.I did struggle with DOF control on anything moving, but i guess that will get better with practice ;-)
Watch it on vimeo http://www.vimeo.com/1214053
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