In a message dated 11/22/00 11:32:01 PM Pacific Standard Time, xyyc@xxxxxxxx
writes:
> http://jahudson.tripod.com/TEMP/34-400NC.jpg
I have yet to discover the reason for the flaring seen in one of the two
images. If anyone has any opinions about this please let me know on or
off list. As far as extent to which the lens captured extremely final
detail is concerned I have concluded that my Leica M lenses would have
done no better.
I have my own private theory on lens flare and have never seen it expressed
anywhere before. Anyway, lens designers create lens for the contrast range
found in common scenes and exposed onto common films, black and white or
color. Many times, the contrast of a scene will exceed that "normal contrast
range" and what will happen is flare just like seen in #34 above. Your scene
may well have had a 12 to 15 stop range of exposure values and was way beyond
the design capabilities of your lens.
Warren
My understanding that flare is just uncontrolled reflection inside
the lens. That is why there are multicoatings for lenses, inside
blacking of lens barrels, and aspheric lens designs to reduce the
number of lens elements. That is why a relatively slow modern, single
focal length is usually better that a zoom with this kind of picture
- few elements, multi-coated, and a well designed barrel.
Winsor
--
Winsor Crosby
Long Beach, California, USA
mailto:wincros@xxxxxxxxxxx
< 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 >
|
