I noticed something interesting when trying out a recently obtained Graflex Optar 135/4.7 with Graphex shutter. I was testing the shutter speed accuracy by using a DSLR shooting through the bellows and lens. One shot was taken using B mode on the DSLR and firing the Graphex shutter, the other picture by opening the Graphex and using the DSLR shutter.
At 1/10 both looked very similar, both perfect circles with even illumination, the Graphex shutter seemed to be somewhat slow leading to a brighter image.
Comparing 1/350 on the DSLR shutter versus 1/400 on the Graphex had a drastically different result. Comparing brightness is difficult as the brightness is very uneven on the Graphex, as a result of the way the shutter blades move. See the attached image.
Will not this in effect act as an uneven aperture shape which would influence the appearance of OOF objects, especially highlights?
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