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SLR lenses on Eclair NPR


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Hi, 

Has anyone here had any experience using 35mm SLR lenses on an Eclair NPR? 

I'm planning on using some Minolta Rokkor lenses on mine using a C mount adaptor. 

If you've used SLR lenses on an NPR, how well did it work, was the coverage good, any tips or tricks? 

Thanks 

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This is no problem at all.  I used a c-mount to Contax adapter all the time when I had an Eclair.  

Coverage is not an issue, since the 135 stills format is much larger than 16mm.

The only minor caveat is that, because the diagonal measurement of 16mm is almost 3 times smaller than 135, the image from the lens is effectively magnified 3x.  So if the lens has some aberrations, they will be much more apparent than what you might be used to from stills or video from larger formats.

I'm sure you're aware that c-mount lenses can become unscrewed if the lens is torqued; this shouldn't be a problem if your lenses are properly lubricated and the focus turns smoothly.  On the other side of the adapter, the lens can shift in the mount of a stills bayonet mount since they are not positive locking.  If your adapter and lenses are in good shape, you shouldn't have to worry about this either.

Other than that, enjoy having lots of longer focal lengths to work with.

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58 minutes ago, Daniel Klockenkemper said:

This is no problem at all.  I used a c-mount to Contax adapter all the time when I had an Eclair.  

Coverage is not an issue, since the 135 stills format is much larger than 16mm.

The only minor caveat is that, because the diagonal measurement of 16mm is almost 3 times smaller than 135, the image from the lens is effectively magnified 3x.  So if the lens has some aberrations, they will be much more apparent than what you might be used to from stills or video from larger formats.

I'm sure you're aware that c-mount lenses can become unscrewed if the lens is torqued; this shouldn't be a problem if your lenses are properly lubricated and the focus turns smoothly.  On the other side of the adapter, the lens can shift in the mount of a stills bayonet mount since they are not positive locking.  If your adapter and lenses are in good shape, you shouldn't have to worry about this either.

Other than that, enjoy having lots of longer focal lengths to work with.

Does the aperture still do it's job the same way since as you say the lens is essentially being magnified 3x?

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The aperture works exactly the same; depth of field, exposure, etc. will behave as they normally would.

You can think of it as extracting the central 1/3 of a 135 stills frame.

To tell you how I learned the hard way:  I once borrowed a Nikkor 55mm f/1.2 for a shoot, hoping it'd be a bit more similar to the Kowa 16mm primes in terms of the coatings and the stop.  While passable wide open for full-frame stills, on 16mm the chromatic aberrations were proportionally larger since the area of the negative being used is smaller.  I went back to my Contax lenses after that - the Zeiss 50mm/1.7 was usable wide open, so it wasn't worth keeping the Nikkor if it'd need to be stopped down anyway.

It almost sounds like circular logic - the better your lenses are, the better they'll look on smaller film formats.

 

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  • 1 month later...

Hi! Totally fine to use 35mm stills lenses. I just shot a music video with an ACL using Samyang/Zeiss primes (24/35/50) look up Dropkick Murphys - 'Middle Finger' - its the narrative footage of the guy chasing the little boy. Looks great - better than my 12-120mm canon zoom or the c mounts.

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I have used Contax/Yashica Zeiss lenses with my ACL and C-mount adapter, works really well - in this short film of mine most 16mm parts were shot with those lenses (and c-mount Switars for wider shots):

 

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Is the c mount the second, top mount? My npr has a PL mount and a c mount on the revolving turret. The c mount is very close to the knob that turns the turret. It does not allow any adapters for slr lenses to fit. For instance, my Nikkor to c mount adapter could not fit. Beware of that. 

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