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At 06:41 PM 4/28/98 EDT, you wrote: > > I was reviewing some of the SPORRS images the other night and I > noticed that some of you aren't bashful about using a teleconverter on > your longer lenses, such as a 200mm or 300mm. I've always refrained > from using a teleconverter, since there has been a lot of negative > publicity regarding their sharpness and light fall-off around the > corners. I'd really like to hear your experiences and recommendations > when it comes to teleconverters. Although I haven't convinced myself > that they are O.K., they sure are a lot cheaper than a new lens, > particularly when you're talking about 300mm and up. Thanks in > advance for your responses. > Danny, I have been very happy using both the 1.4 and 2.0 Canon teleconverters with all of the the Canon lenses from my 70-200mmL2.8 to the 400mmL2.8. The only thing I am able to detect as a loss when using them is the one or two F stops. This can be critical with slower lenses and faster trains. I have even tried using them together with a 12mm extension tube between them. The results on the 400mm lense is an incredible 1120mm all but the loss of focusing to infinity. But a remarkable closeup from a long way off. Far enough away that the closeup included the entire train, not cropping in on part of it. I do believe that teleconverters will show off the quality or lack there of, of the lense quicker than anything else. Therefore, if you are dealing with less than professional quality lenses, the lack of sharpness, or softness will be multiplied. Charlie Charlie Dischinger - Somewhere in the Ozarks. Springfield, Missouri ======================================================= -> SPORRS: 'Serious Photographers Of Railroad Related Subjects' -> Web Site: http://www.anet-stl.com/acphotog/sporrs/ -> Message © 1998 SPORRS® - All Rights Reserved =======================================================
