Re: Odd problem with Kodak EIR airphotos

[Ken Sinclair <photo1@xxxxxxxxxxxxxxx>]

Tom,

One posssible solution that you might want to consider...

I had a friend who spent a great deal of time photographing prairie farms
from light aircraft. He once complained that his some of his images were
suffering similar problems. He was pleasantly surprised that his problems
disappeared when he replaced his soft/folding lens shade with a firm metal
one. Apparently, the increased force of "slipstream" from the open window
(or removed door) was partially "collapsing/vibrating" the soft lens shield
into the field of view, causing under- exposure on one end of the
negative... He swore that he never saw this in the viewfinder, but
subsequent tests proved the problem.

Ken

>It is neither due to specularity
>because the underexposed side is on the side of the sun (azimuth 180 ).
>Differential shading provides no explanation neither, because also flat,
>horizontal objects as roads appear darker as elsewhere in the image.
>
>Any idea ? Has anybody ever heard of such a problem ? Otherwise any idea
>who else I can ask ?
>
>Thanks, Tom

[||/\/\/\/\/\/\||      Ken Sinclair RBP,FBPA
[||                            ||-|   Applied Photographic Services
[||                            ||  |  Lethbridge,
[||                            ||  |  Alberta, Canada,
[||                            ||-|   (403)381-1654.
[||\/\/\/\/\/\/||      photo1@xxxxxxxxxxxxxxx
_0___________0______
|__________________ |
                O


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End of Infrared-Digest V0 #682
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