Camera Labs

Canon 40D with 75-300mm IS USM @ 185mm
Exposure 1/200
ISO 640
F5.6
Post processing: Photoshop Auto-Levels

I've read that this lens does begin to soften slightly above 200mm and have noticed this myself at 300mm. I recently upgraded to the 70-300mm lens and it's definitely sharper at 300mm.

Hi brickdog,

Thanks for adding a new lens to our gallery and thanks also for your series of PMs helping me to understand exactly which variant of 75-300mm lens we were discussing. One of those PMs included a photo of the front of the lens which clearly shows the name as EF 75-300mm 1:4-5.6 IS so, from the Canon Camera Museum, as there is only one variant of 75-300mm which includes IS then I think this must be the EF 75-300mm f/4-5.6 IS USM and that lens is a piece of Canon history as, from that page:

This telephoto IS (Image Stabilizer) zoom lens is the world's first interchangeable lens for SLR cameras that incorporates an Image Stabilizer

That lens was only superseded in 2005 (by the EF 70-300mm f/4-5.6 IS USM) so I guess the chances of your lens being once of the early ones are slim but it's still really nice to see this lens showcased here on the forum. Thanks for sharing.

Bob.

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OM-D E-M5 + ED 12-50mm, H-PS14042E, H-F007014E, L-RS014150E, M.ZUIKO DIGITAL 45mm 1:1.8.
Gitzo GT1541T, Arca-Swiss Z1 DP ball-head.
Astrophotography: TEC 140 'scope, FLI ML16803 camera, ASA DDM60 Pro mount.

Great detective work Bob - I'm sure that's the lens. Thanks