Hi WJM & the list... Willem-Jan Markerink wrote long ago:
> http://www.weihenstephan.org/~joachenk/makrozoom.html > > The writer starts by describing the Zeiss Tessovar macro-zoom as the > only true macro-zoom (ignoring both the Minolta 3-1x and Canon 5-1x > micro-lenses IMO), but he is then confronted with the results of a > normal EOS-zoom (28-135), reverse-mounted, through a Novoflex > reverse-adapter, being optically on par with results from Zeiss > Luminar lenses (considered state of the art in photo-micro land). > It is optically explained by the fact that the big front lens of the > zoom, now facing the camera, is only used in the center, where even a > lousy engineer can do a decent job. > Haunted by this e-mail from WJM (dated 07/07/2001) I proceeded to build my very own reverse mount adaptor and I've been trying the 28-135 inversed on my EOS30. I'm indeed impressed by the quality and flexibility of this macro zoom. Actually It's *incredibly* flexible, allowing you to frame your subject by adjusting the zoom and the internal focus altogether. My adaptor introduces some distance between the front element and the lens sothat I can't really focus to infinite as the original post states. On the other hand I reach 3.5x magnification at the wide end, with generous 25mm of working distance (actually, enough to fit my 550ex next to the subject, that becomes a great softbox at these magnifications. The only downside is that IS doesn't work. Actually, I should say that it works "inversed" as well, since it magnifies the movements of the camera, making the image jump like doing macro work on th back of a truck crossing wild roads in the amazonia. As soon as I make an image worth showing, I'll publish something to let you see. Kind regards, Gerard. -- ==================================================================== V Gerard MAAS Senior Research Engineer +---------------+ Alcatel Bell NV [EMAIL PROTECTED] | A L C A T E L | F. Wellesplein 1 Voice: +32-3-240.7805 +---------------+ B-2018 Antwerpen, BELGIUM Fax: +32-3-240.9932 Myriad Innovative Venture ==================================================================== * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
