Using ND (Neutral Density) Filters with 8mm / 16mm Movie Cameras 

Mike, you're out there fighting the good fight against movies shot wide open in broad daylight with 500T! In all seriousness, I didn't start regularly working with ND filters until my very first visit to FPP's Butler HQ and you were setting up lights and filtration for a stills shoot!

I imagine there are steps down rings which can hold your filters in place even though larger than the lens circumference.

I have yet to see a cine lens that stops down to f32.

Greetings Mike, I use 35mm Nikkor lenses on my Bolex H16 Rex 5. I always wondered if apertures for 35mm and C-mount lenses were the same. For example, if I use a 35mm lens at f/4, the opening is much bigger than if I use a C-mount lens. Does that extra light going through the lens have to be compensated for? Since 1/3 of the light is diverted to the viewfinder by the Bolex prism, perhaps I should open up a stop? I'd be interested in hearing what you have to say about this...Maybe this question could be answered in the upcoming Show....What show?

Question: Are the treads on the lenses universal? Could I put that lens on another make of camera, say a Bell & Howell or whatever?

Do ND Filters come with every movie camera or are they sold separately? Also when were they invented?

If only the ND filters fit the lens...