Compatible with 4K cameras that have a 1/1.8" sensor, the EG3Z3915FCS-MPWIR CS-Mount 3.9-10mm P-Iris Lens from computar has a 144.1 to 52.9° diagonal field of view. The lens's IR-corrected optics enable a camera's sensor to take in visible and IR illumination in low light conditions (when the IR cut filter is in the open position), while eliminating the problem of IR focus shift. Featuring P-iris control, the lens automatically adjusts iris position to optimize image quality in varying lighting conditions while improving clarity and depth of field. Focus and zoom are manual.

Compatible with 1/1.8" 4K Sensors    CS Mount    3.9-10mm Focal Length    144.1 to 52.9° Diagonal FOV    Manual Zoom & Focus    P-Iris    IR-Corrected Optics

Compatible with 1/1.8" sensors

Supports 4K format

Precise manual focus adjustment

IR-corrected optics

Corner brightness

Related Questions and Answers

Q: 1. What is the best setting to make it clearer instead of blurred shots tried so many variations but seems it doesn't work? Sighs...

A: The Rokinon 10mm is a manual lens. First the focus is done manually to note.And to create more depth of field you need to set the lens to a higher f/stop like f/8-f/22.If the shots are blurred not from depth of field but from movement you need to set the camera to a faster shutter speed. And in low light you most likely need to raise the ISO as well.

Q: 2. What different betwwen this Samyang lens and Rokinon lens?

A: There will be little to no difference between the lenses in terms of performance or design. It looks as though the Rokinon has a limited 1-year worldwide warranty, while the Samyang has a limited 1-year USA warranty.

Q: 3. Is this autofocus (on Sony A6000) or manual?

A: It's a manual focus lens.

Q: 4. is there really no way to add ND filter systems to this lens? No compatible products? I love this lens for astrophotography and sunsets but need to add light pollution or reverse gnd filters to enhance those subjects.

A: One could try to connect the NiSi 150mm Filter Holder for Voigtlander Hyper-Wide Heliar 10mm Lens: https://bhpho.to/2yUDy6z . The Focal Length of both lenses is the same, and the adapter mounts behind the lens shade of the lens, and is made not to vignette mounted on a 10mm lens. But the two shades look different, The Rokinon lens shade is longer, so attaching may not work. If one could shorten the depth of the lens shade it may fit, otherwise it may not be possible to mount filters on the Rokinon 10mm f/2.8 ED AS NCS CS Lens for Pentax K Mount

Q: 5. Will this lens work with a Panasonic GH5 and a Metabones Speedbooster Ultra 0.71x?

A: Yes this lens will function with the gear you have specified.

Q: 6. Can this lens Auto focus?

A: Not on my XT-1 or XT-2.

Q: 7. Will this mount direct to an Olympus EM 10?

A: Yes, this lens will mount directly to an Olympus EM10.

Q: 8. With Nikon D500, the aperture shows an error (FEE) at any setting other than F22; which camera records as F4 on Manual. Help?

A: The Rokinon 10mm f/2.8 ED AS NCS CS Lens for Nikon F Mount doesn't have electronic contacts so you have to select the aperture from the lens. The lens can't communicate the aperture information with the camera.

Q: 9. is it 10mm on apsc or 16mm?

A: The Cannon is not a full frame sensor, so multiply by the difference. This is about the smallest size available for aps.

Q: 10. are you able to mount filters on this lens? if so what mm filter would be used?

A: The hood is not removable. The only way to use a filter is to use a system that attaches to the outside of the lens.