Re: Lens flare

[boblong@xxxxxxxxxxx (Robert Long)]

On Mon, 3 Feb 1997 23:18:16 GMT, Tim Coffer wrote:

|My problem frames are relatively normal on the edges and the frames are
|well contained within their 24X36mm limits. Only with close scrutiny do

The "bands" across the frames do seem to correspond to mine, even
though your description of what you find in them differs.  The
differences may well be due to differences in exposure or development.
Or both.

|image. The sky is dark anyway, due to the #25 and polarizer.

Heaven forbid that we should reopen old threads, but a discussion here
some time ago (before you joined us?) dealt with whether adding the
polarizer could achieve anything beside forcing a slower shutter speed
or wider aperture.  In the beginning I was intellectually convinced
that it could, due to the visible-light band in the red that I could
see through the viewfinder and to which HIE is sensitive.  Visible
change there, as I rotated the polarizer, was dramatic.  But, of
course, the red band I was seeing represented only a fraction of the
illumination to which the emulsion was responding.

As I remember it, Joe and Willem in particular were more than a little
skeptical on the ground that polarizers essentially affect only the
visible portion of the "light" that produces the exposure.  My
negatives were inconclusive, though they did prove that the difference
was minor at best.  I plan to retest in the next HIE roll--following
the big snow that we still haven't had this winter.  Grrrrr.

Bob Long
(boblong@xxxxxxxxxxx)

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