On 13 Jan 2004 at 7:09, Collin R Brendemuehl wrote: > Tubes are really nothing different from the long helicoid of a macro lens. > The difference is, as always, in the glass. Anything wider than 50mm > may give some curvature that's unappealing, to say the least.
Hi Collin, Thanks for the suggestions (and thanks too to the other listers who responded). The fact is that two of my macro lenses have fixed rear elements so the tubes aren't any longer actually simply an extension of the helicoid as they once effectively were. Some experimentation is in order. > Try some shots & look @ the results. You may well be pleased with what you see. I think that's what I'll be up to tomorrow eve. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
