Goosnargh writes:
<< On a side note, any reason the 180/2, 250/2 and 350/2.8 are white? >>
To minimize heat build-up. The infinity stop (point in the helical at
which you are focused on infinity) changes with temperature, so a lens
less apt to retain heat from sunlight is less apt to have focus shifts
when moved from shade to sunlight exposure.
Gary Reese
Las Vegas, NV
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|