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Canon DSLR Challenge | all galleries >> Challenge 99 - Borders, barriers and boundaries (Host: Najinsky) >> Eligible > At The Gate
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30-JUL-2007 Jim H.

At The Gate

Canon EOS 20D ,Canon EF-S 17-55mm f/2.8 IS USM
1/13s f/3.5 at 17.0mm iso1600 hide exif
Full EXIF Info
Date/Time30-Jul-2007 02:38:47
MakeCanon
ModelCanon EOS 20D
Flash UsedNo
Focal Length17 mm
Exposure Time1/13 sec
Aperturef/3.5
ISO Equivalent1600
Exposure Bias
White Balance
Metering Mode (-1)
JPEG Quality
Exposure Programaperture priority (3)
Focus Distance

other sizes: small medium original auto
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Vikas Malhotra06-Aug-2007 08:55
Great image Jim, the shadow is awesome.

Cheers, Vikas.
Canon DSLR Challenge02-Aug-2007 18:00
Fabulous shot Jim, very skillful and highly effective (as usual). I've been looking out for this lens but it's out of stock on the Island at the moment. I'm reading (and seeing) a lot of good things about it. Regards, -Najinsky
Canon DSLR Challenge02-Aug-2007 15:02
Jim the image speaks for itself, the powerful line, composition and color...

I also appreciate your "technical notes' that allow us a peak behind the scenes at your winning formula. thanks for sharing, bruja
jimhwy02-Aug-2007 02:26
Except that you've got to throw in the 1.6x factor too, so the rule of thumb would indicate that you should use a shutter speed of at least 1/27th of a second (assuming that you've set your "acceptable smear length" to be a fixed percentage of the frame width).

Still, it's always easier to hand hold wide angle shots than telephoto shots. But I've gotten excellent hand held shots with this lens at 1/2 second. The IS just extends what you'd normally be able to do at any given focal length and the newer IS works well even for quite long shutter speeds.

I've always wondered if the IS control algorithm takes the focal length and the selected shutter speed into account to adjust some of the parameters for the feedback loops. This would be good because you're always balancing the ability to track a moving object against stifling unwanted shake. At some point, you've got to give up and allow the image to slew. So there would always be a lower frequency limit. And it'd be nice to think that they reduce that lower limit as you go to wider angle settings or select longer shutter speeds.

Based on how well it all seems to work at wide angles, I think they may well do that on these lenses. But I don't actually have any inside dope on how their IS algorithms work.

Jim H.
Canon DSLR Challenge01-Aug-2007 23:40
Plus, what do they say, 1/focal length handheld. And 1/13s is pretty close to 1/17. -- Victor
Canon DSLR Challenge31-Jul-2007 15:26
Thanks everyone. The IS helps a lot. I am always highly amused when I read on the forums about how IS is useless on wide angle lenses ;) Jim H.
Canon DSLR Challenge31-Jul-2007 15:14
Wow... "1/13s...one handed" ?? Great capture Jim and a terrific concept. ~ Regards Melbob
jnconradie31-Jul-2007 04:24
Super work, Jim, as always. That shadow is enormously powerful. Compliments and regards jnconradie
Julie Bird31-Jul-2007 00:03
Interesting angle, well taken Jim. Julie
Guest 30-Jul-2007 18:43
Fantastic I love this the shadow makes a strong image and statement.
George Christakos30-Jul-2007 14:48
Awesome photo. Strong, powerful. V.