FotodioX Canon EF to C-Mount Pro Lens Mount Adapter

BH #FOPLMAEOSLCM • MFR #EOS-C-PRO-IRIS-DCLK
FotodioX Canon EF to C-Mount Pro Lens Mount Adapter
Key Features
  • Adapts Canon EF Lens to C-Mount Cameras
  • Maintains Infinity
  • Incorporated Manual Aperture Adjustment
This Pro Lens Mount Adapter from FotodioX allows you to mount your Canon EF lenses on a C-mount camera as well as on some microscope phototubes. The smaller imager associated with C-mounts means that you will be recording from the center of the lens, which tends to be the best part of the lens, optically speaking.
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$59.95
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FotodioX EOS-C-PRO-IRIS-DCLK Overview

This Pro Lens Mount Adapter from FotodioX allows you to mount your Canon EF lenses on a C-mount camera as well as on some microscope phototubes. The smaller imager associated with C-mounts means that you will be recording from the center of the lens, which tends to be the best part of the lens, optically speaking.

Even though Canon EOS lenses use an electronic aperture, which will not function with adapters, this adapter's built-in clickless iris allows you to use your lens with some exposure control. It can be used to shoot both in manual mode and in aperture-priority mode. Automatic diaphragm, auto-focusing, and other lens functions will not work correctly while using this adapter. Lens aperture cannot be controlled via the camera body, and "stop-down mode" will need to be used when metering.

This adapter is designed for EF mount lenses. It is not designed to work with EF-S mount lenses
All-metal design with polished surface
Allows you to share lenses between cameras
Mounts onto C-mount Cine & CCTV cameras as well as some microscope phototubes
Built-in clickless iris allows some control over incoming light
Infinity focus is maintained
UPC: 847372030316

FotodioX EOS-C-PRO-IRIS-DCLK Specs

Adapter
Camera MountC-Mount
Lens MountCanon EF
Physical
MaterialBrass
Packaging Info
Package Weight0.3 lb
Box Dimensions (LxWxH)3.35 x 3.1 x 1.35"
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Would this work on a beaulieu 5008 super 8? Have ...

Would this work on a beaulieu 5008 super 8? Have a canon EF 70-300mm ultrasonic. Please answer back
Asked by: Austin
From our research that vintage camera does have a C-Mount. However how well any adapter and modern lens will work on a Vintage piece of gear is something you would need to test out to see the results. Since this is an EF to C-Mount adapter it should work, but we are not aware of any specific testing done between the two.
Answered by: Joseph
Date published: 2019-09-11

question

What is the maximum aperture of this unit? Are the marks indications of 1/3 stops or do they just serve as a rough guide?
Asked by: Jamie O.
Strictly speaking this adapter has an iris, but it does not act as an aperture control: it is located in the wrong place in the image path for that. It is a nice feature for increasing contrast (by reducing flare due to all the extra light transmitted by an EF lens, since the EF lens covers a much bigger image circle than (the typical) sensor in a C-mount camera. The iris can be used to block all light falling outside the circle needed by your sensor. Closing the iris beyond this point will cause vignetting (darkening of the image starting in the corners) without affecting the brightness at the image center. So, in sum, it is a nice feature to have, but don't buy expecting aperture control, which is something you need to use your lens to do.
Answered by: ALLAN B.
Date published: 2018-08-26

question

Hi, I have a Samsung mini and I recently purchased a c mount lens adapter. I was wondering if this adapter would fit my c mount adapter.
Asked by: Anonymous
I don't think so. The C-mount is the standard screw mount for 16mm cinema film cameras. I bought this adapter for my vintage Bolex H16 film camera so that I could put my modern Canon DSLR EF-mount lenses on it. If the Samsung Mini is a cell phone as Google suggests, then this adapter will do nothing for you.
Answered by: Alexis B.
Date published: 2018-08-26

question

I am about to put my Rokinon Cine Primes on my Bolex H16 and shoot some Tri-X 200 asa. Has anyone tried this? Is there a calculation for setting exposure to adjust for using the c mount to eos ef Canon adapter? If no one responds I will be happy to post my results.
Asked by: Anonymous
The iris on this adapter is not needed for use with manual lenses like the Rokinons. You just use the manual iris on the Rokinon lens while leaving the iris of the adapter at its widest opening. The adapters iris is meant to compensate for loss of the iris control of a Canon EOS EF lens. Now in the digital world you could just set this up and see the effect of the adapter iris immediately on screen. However, since you are shooting film, we suggest doing what a professional would do before principal photography and that would be to shoot an exposure test. (there is no available exposure calculation chart for this adapter.) Line up a shot of a person holding a grey card plus a notation of what the f/stop is that you have determined by using a light meter. You can use a clapperboard or a clipboard to display the card and the f stop. (Do yourself a further favor and have it held steady in the frame held by a grip stand.) I would shoot at a variety of f/stops so that I would know what was happening if I was to shoot at those f/stops. As you can see, we strongly suggest sacrificing a roll of film this way so that you know you are getting correct exposure once you start shooting for real.
Answered by: Dennis A L.
Date published: 2018-08-26

question

Do Canon EF-S lens also fit on this adapter?
Asked by: Seth P.
Sorry no, a EF-S lens will not work with this adapter. I suspect it is because the rear glass element of the lens will hit the aperture blades.
Answered by: Dennis A L.
Date published: 2018-08-26

question

Will this adapter works with Zeiss Compact Prime CP.2 - EF Mount? Thanks.
Asked by: Anonymous
It will work with any EF mount lens.
Answered by: Dana G.
Date published: 2018-08-26
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