On Dec 21, 2011, at 09:32 , Charles Robinson wrote: > On Dec 20, 2011, at 18:52, Paul Stenquist wrote: > >> I don't have a hood, but you may want to hold the lens up to a white light >> to see if there's a yellow cast to the elements. The 35/2 Tak is one of the >> lenses that may have been built with the radioactive elements . If so, it >> would be subject to yellowing. No problem shooting digital. It's only a >> drawback when shooting film. (I have a yellowed 35/2, hence my knowledge of >> this.) > > Have you not tried the "subject this lens to UV light for quite some time" > cure for this? > > Just needs a bit (ok, some days) of sunlight. Or so I have read. >
Wouldn't one need to mount the lens on a motorized sun tracking mechanism so as to prevent uneven sun time across the measure of the optics? Joseph McAllister [email protected] The Big Bang was silent, and invisible in it's beginning moments. Photons were one of the earliest particles to develop, but I don't think any were able to escape for a little bit more. Once they could, there would have been a flash during expansion. No one would notice, of course, for another 4.2 billion years. Now we are trying to catch up by looking out, and back in time to that infinitesimally small fraction of a millisecond in an attempt to see what caused that singularity to become the Big Bang. This attempt will fail in any visual way, as the furthest galaxies and elements are now moving faster than light by recent theory, making the information sought beyond a theoretical event horizon. — update to the Pentaxian's thoughts on particle physics, so far. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
