Aperture Q for the Letus guys

Barry_Green said:
I'd love to see some evidence of that then. Because I've heard this theory proposed, and it makes no sense whatsoever from a perspective of optics or from experience. But it keeps cropping up, so I tested it by using an adapter and a normal amount of light, and then increasing the light level by 256x as much and compensating by using ND filters in the camera, and the results were identical. There is no effect on the ground glass, and the whole concept of a ground glass being hazy or overloaded with light is just silly. It makes no sense.

If someone can prove this, let's see it. 'Cause otherwise I'm calling this either an urban legend, or someone not knowing what they're talking about, or maybe someone had a dirty internal ND filter on their camera and came up with this silly theory as a way to try to explain it.

But you cannot haze or overload a ground glass with light. The whole concept makes no sense.
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I also thought this could be true so I tested the same. Sure, the GG can looked overexposed when the lens is wide open (and for someone new to this technology it could 'logically' be assumed that the detail would be blown out and could not be 'salvaged'; which is why someone would think that the light has to be cut down prior to hitting the GG). I did the same test and there was no difference with my HVX, so I put that theory to rest. Maybe a camera that has cheap internal digital ND filters may cause a difference, but at least the HVX shows no difference.
 
Leo Versola said:
With the Extreme, my quick tests initially indicate I can stop down to about f8 or maybe f11 without objectionable graininess to me, but then I have to zoom in more to eliminate/reduce the increased vignetting.
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This is interesting...any chance of posting grabs or short clips at the various fstops?
 
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