Carlos J. Santisteban Salinas says:
>Given that N[eff] = N (1+M)---there are no other variables in this, now
>I think magnification may be the only relevant factor and the pupilary
>magnification is a side issue .
"Probably some variables compensate the others and, all things
considered, we
get the same formula -- if we think on _effective_ FL terms."
Thanks for all the comments, Carlos--hoped you would chime in.
Seems effective focal lengths are rarely provided.
Some insights into how the lenses are constructed can be gleaned from
a table--but only of the micro Nikkors:
http://www.swissarmyfork.com/lens_table_1.htm
The CV 125 F2..5 macro clearly saves about 1/2 stop to 1:1 from
internal shenanigans.
Mike
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|