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Sea & Sea performance with Canon 40D and 17-40mm lens
Steve Williams tests the Canon 17-40mm lens in his pool
Posted: 07 August 2009 01:31 PM
Last Update: 07 August 2009 01:36 PM
Categories:
Features,
Library,
Still Photo
Last Update: 07 August 2009 01:36 PM
Author: Eric Cheng ( echeng )
This Article's URL: http://wetpixel.com/i.php/full/sea-sea-performance-with-canon-40d-and-17-40mm-lens/
Related Link: /forums/index.php?showtopic=30826
Steve Williams had some time recently and tested his Canon 40D / Sea & Sea underwater housing setup with a 17-40mm lens and various Sea & Sea dome extenders:
In preparing for a JASA wild dolphin trip next week I've been trying to determine the best port configuration for my 40D using the 17-40L. The Sea & Sea chart recommends the NX Fisheye dome with no extension. My early simple checks in the pool showed some very soft corners with this setup... I shot a sequence of apertures; 4, 5.6, 8, 11, 16, 22 at 17mm, 29mm, and 40mm for each of four configurations with my NX fisheye dome... The Sea & Sea recommended configuration provided the worst corners in all cases.