BIRDS AS ART BULLETIN #19
GREAT EGRET IMAGE MADE WITH STACKED 2X TELE-CONVERTERS
Attached is an image that I made at the Venice Rookery in February.
The bird sat atop the colony more than 105 feet from my position. I used
the Canon EF 600mm f/4.0 Image Stabilizer L lens with two 2X
tele-converters stacked around an EF 12mm extension tube.
The film was Fuji Velvia pushed one stop. Evaluative metering plus
1/3 stop yielded a shutter speed of 1/100 second at an
aperture of f/8. The effective focal length was 2412 mm. Manual focus
was employed (as AF does not function at the effective aperture of
When viewed with a 4X Schneider loupe the original image is
The scan was made with our new Nikon LS 2000 with Laser Fast
software. No sharpening techniques were used. On both of my monitors
the image appears sharp. As this is the first image that I have
transmitted on line, and I am not used to assessing the sharpness of scanned
images, I would appreciate any and all feedback.
As for the technology, I can only say what I have been saying all
along, that Canon's IS technology allows wildlife photographers to do
things that they could never have done before. As the
theoretical loss of sharpness is approximately 20% for each 2X teleconverter,
the results attached here must seemingly attest to the incredible sharpness
of the 600mm f/4 IS L lens when used at wide open apertures.
Visit www.birdsasart.com on the web.
Morris/BIRDS AS ART tel: 863-692-0906
PO Box 7245, Indian Lake Estates, FL
Best and great picture making to
Note: Arthur Morris has been a Canon contract
photographer since 1994 and continues in that role today. If you
received this bulletin in error, or would like your name removed from the
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