The 12mm T3.1 ED AS IF NCS UMC Cine DS Fisheye Lens for Canon EF Mount from Rokinon is a lens optimized for digital cinematography and as such provides a de-clicked manual aperture for smooth and silent adjustment and unified focus and aperture gears for use with follow focus accessories. Also, focus, aperture, and depth of field markings are on the side of the lens to aid focus pullers who typically operate on the side of the camera. Aperture is measured in absolute T-stops to provide accurate and consistent exposure across lenses and color rendition is matched with other Rokinon cine lenses for consistency.

This fisheye lens provides a 180º diagonal angle of view on full-frame cameras for an ultra-wide angle, distorted perspective that is useful for architectural interiors, landscapes and creative experimentation in any application. The T3.1 maximum aperture is effective in low light situations and enables some measure of shallow depth of field control. 

The lens' optical design consists of 12 lens elements arranged in 8 groups including three elements made of low dispersion ED glass and two aspherical lens elements to minimize coma and chromatic aberrations. Highly effective nano crystal anti-reflection (NCS) coating applied together with UMC coatings improve light transmission and reduce ghosting. Its internal focus system does not extend the front elements during focus and minimizes the effects of lens breathing.

12, 14, 24, 35mm Lenses Cover Full Frame    Consistent Color Multi-Coating    Standard Gearing for Focus and Iris    De-Clicked Iris    Dual Side Focus Scales

This Canon EF Mount manual focus lens optimized for digital cinema provides a de-clicked manual aperture for smooth and silent adjustment and unified focus and aperture gears for use with a traditional follow focus. Also, focus, aperture, and depth of field markings are on the side of the lens to aid focus pullers who typically operate on the side of the camera. Aperture is measured in absolute T-stops to provide accurate and consistent exposure across lenses and color rendition is matched with other Rokinon cine lenses for consistency.

An ultra wide-angle fisheye lens with a 12mm focal length on full-frame cameras and an 19.2mm equivalency when used on APS-C and Super 35mm format cameras. Its distorted perspective is useful for interiors, landscapes, group shots and many creative wide-angle applications.

Extra low dispersion and aspherical lens elements reduce aberrations for sharp, color-accurate imaging.

Nano crystal coating and ultra multi-coating on the lens elements improves light transmission and reduces ghosting and flare.

Sturdy metal barrel with removable petal-shaped lens hood.

Related Questions and Answers

Q: 1. This lens accepts filters? How many millimeters?

A: It will accept 77mm filters.

Q: 2. Can I use this lens on a Canon 7D Mark 1?

A: I see no reason why it should not.. I have used it on a canon 600D (T3i) before and it was alright

Q: 3. I have a Sony a7 iii and a Nikon D810. will this work for either?

A: It will not. This is an MFT mount lens. The A7III is E-Mount and the D8100 is F-Mount.

Q: 4. Is this essentially the same lens as the 20mm f1.8, but for Cine?

A: If you are referring to BH #RO2018CES then yes, optically it is pretty much the same lens. The difference is the Cinema version has gear rings included and a de-clicked aperture.

Q: 5. I wanna know if this lens breath?

A: Yes, this lens will exhibit some breathing.

Q: 6. Hi,will this kit work on a BMMCC + a speedbooster for BMPCC? Especially the 16mm one, considering its sensor size. Thanks!

A: Sorry but the Metabones Canon EF Lens to Blackmagic Pocket Cinema Camera T Speed Booster ONLY works on the Pocket Cinema Camera. Used on the Blackmagic Design Cinema Camera (MFT Mount) the adapter's rear glass element may cause damage to the camera. You would have to use the Metabones Canon EF Lens to Blackmagic 2.5k Cinema Camera T Speed Booster (Micro 4/3 Mount) to mount these lenses on the camera. The 16mm is meant to cover an APS-C sensor which is 22.2mm wide. With the Booster's 0.64 factor applied, that comes to 14mm. You will be good since the Blackmagic Design Cinema Camera (MFT) sensor is 8.8mm wide.

Q: 7. Im thinking of getting this kit with the Panasonic GH4, should I get the MFT set or should i get a metabones adaptor and the Canon EF set? If so what s the best adaptor to get to counter the GH4s crop factor?

A: If you get the set in MFT or E mount, you cannot use it with any other mount. If you get them in EF, not only will they work on a EF camera but with the appropriate adapter MFT, and E mount cameras as well. A Metabones speed booster will widen out the FOV of these lenses, negating the need for purchasing an extra lens for your wide needs. If you are going to use the GH4 for still and video, get the 0.71 Speedbooster. If you are using it for video only, go for the 0.64. This matches the lenses best for their intended use.

Q: 8. Hi! I'm getting this lens and a black pro mist filter but ii'm not sure on the thread size of this cine ds lenses. Can someone help me out?

A: This lens has a 77mm Filter Thread. You could use a filter like the Tiffen 77mm Black Pro-Mist 1/4 Filter, B&H # TIBPMQ77, with it. https://bhpho.to/2UL5RKv

Q: 9. Is 35mm focal length expressed in terms of MFT or full frame? I/o/w, on a GH5s, will this lens yield a 35mm field of view, or 70mm?

A: Lenses are listed for their focal length first, from there they are subject to the crop factor of the camera. This is a 35mm lens, but when put on the GH5s with a 2x crop factor if will give you a 70mm field of view.

Q: 10. Is there any problem with getting the Nikon mount and adapters for Canon EF and Sony E?

A: You can use this adapter for Nikon to Canon mounts. I like it for it has the focus aid. FotodioX Pro Lens Mount Adapter for Nikon F Lens to Canon EF-Mount Camera with Dandelion Focus Confirmation Chip B&H # FOPCECANF. You can use the Vello Nikon F Mount Lens to Sony E-Mount Camera Adapter B&H # VELANEXNF.