FS100 Novoflex Nikon G Mount Issue

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dust'n the callipygous

Well-known member
Had a shoot last week with the fs100 and zeiss zf lenses. We had the novoflex adapter, which made it to where we had to lock the aperture on the lens and adjust using the adapter instead, which doesn't give any indication of f stop. It was a bit odd, but this part wasn't a huge concern, since I could still check my exposure accurately on a monitor--but it did cause a few weird issues when focusing. We shot mainly on one lens, and several times, during longer focus pulls, I noticed the exposure shifting slightly. It wasn't a smooth shift, that would be caused by iso or shutter speed being set to auto (they weren't). It was jerky, like aperture rings clicking between stops. I'm not sure why adjusting focus would have any bearing on that, but I'm guessing that mechanical connection of the aperture to the adapter somehow played in. Unfortunately we didn't have any type of backup and just had to make do. Anybody ever seen anything like that before?
 
I never used Zeiss ZF lenses on my FS100. I do use the nikon novoflex adapter with Nikon AIS primes, but never experienced anything like that. If the camera was on Full manual, it probably has to do with the Zeiss lens.
 
Yeah, I'm thinking it's some kind of conflict with two manual aperture adjustments. Possibly that one doesn't lock entirely and that the torque from the focus rotation could also shift it slightly. But I'm no lens technician, so I'm not even sure if that's possible.
 
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