Herb, That's just bizarre, it looks like you've discovered a chlorophyll
filter.
Herb Chong wrote:
i was shooting yesterday in the Catskills and needed an in-between ND
filter of 4 stops because i only had my 6-stop B+W filter with me and
not my 3-stop one. since i carry a Hi-Tech 85mm square ND filter with
me in my Cokin P grad ND filter bag, i placed it on the filter holder
in front of the circular polarizer and proceeded with my shooting.
chimping on the LCD showed something odd, but i wasn't sure of the
magnitude. everything looked OK in the viewfinder. getting back home
and looking on the monitor showed really radical effects. anyway, here
is a link to a small gallery showing a pair of results with a
combination of Cokin circular polarizer + Hi-Tech 4-stop ND versus
Hoya Super HMC Pro 1 circular polarizer and B+W 6-stop ND filter. the
"normal" color ones were taken with the Hoya/B+W combination while the
"odd" ones were taken with the Cokin/Hi-Tech combination.
http://users.bestweb.net/~hchong/Temp/
what gets me is that looking through the viewfinder and just holding
the filters up to look directly through them don't show any difference
between the combinations.
Herb....
--
When you're worried or in doubt,
Run in circles, (scream and shout).
