Re: IR spherical panorama

[Ben Kreunen <ben@xxxxxxxxxxxxxxxxxxxxxxx>]

>
>Have you done any of your non-IR spherical panoramas at full aperture? (One
>might think that it would seldom be needed, given better film speed and
>less filtration.) If not, the lens may simply have some light fall-off at
>f/4. Which may have gone unnoticed in any pictures, IR or non-IR, you have
>taken for purposes other than spherical panoramas.

As always, someone has to suggest the obvious thing that got 
overlooked  ;-) ....  this sounds like the most plausible explanation which 
I will test later today.  Everything I normally shoot is at f8 and I only 
shoot at f4 when I need to do the vertical down shot handheld. As I only 
use the center portion of this image I would not have paid any attention to 
light fall off for just one image.

See what happens when you get side tracked by red herrings  ;-)


Cheers

Ben

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