Hi Peter, The Vivitar I used to own and did the measurements on was not a Series 1 lens, but very similar to a Panagor / Elicar of the same era. And it certainly did extend some distance at 1:1.
The reason why there's (near fanatical?) interest in this aspect of 100mm and above macro performance is that we're all encouraged to forget the normally cheaper macros and for nature work go for the longer and more expensive macro lenses so as to get more working distance between the lens front and the insect etc. we're trying to photograph. In practice a good lens hood helps keep flare at bay, but that plus the newer IF designs (also on the Tamron I believe) does reduce the effective working distance particularly at, or close to 1:1. In an earlier post (possibly not to this list) I mentioned that some of my best early butterfly shots were taken with the cheapy 75-300 USM at the 300mm setting and this gave me ~1:4 or 1:5. Images were smallish, but my success rate was fairly high as I didn't get close enough to scare the butterflies. Malcolm Milton Keynes, UK ----- Original Message ----- From: Kotsinadelis, Peter (Peter) <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, November 08, 2002 12:58 AM Subject: RE: EOS Seeking macro information > > > Malcolm Stewart wrote: > Last year I did some measurements on macro lenses, which I'm quoting below: > ---------------------------------------------------------------------------- snip > > As an afterthought I've dug out my X-700 with my Vivitar 90 f2.8 macro and > done the same measurements: snip > PS Is the Vivitar the Series 1 macro? If so, that is one heck of a lens even > by today's standards. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
