Rokinon Xeen 20mm T1.9 Lens Canon EF Mountis built specifically for use as a cinema lens. It features an internal focus design so that the lens does not change size while focusing, this minimizes the appearance of breathing when changing focus. Each lens in the set is multi-coated for good contrast, glare prevention, and color match to a factory standard, allowing you to assemble a set over time with minimal color shift. This 20mm lens provides what is considered a wide angle of view on full-frame cameras, and a correspondingly tighter angle of view on smaller-format cameras.

The lens features dual sided focus scales marked in feet, with dual sided iris scales. The 11-bladed iris provides a rounded aperture for natural looking highlights and "bokeh" (out-of-focus highlights). The lens is a manual focus and iris lens, and does not have auto focus or auto iris capability. It incorporates cinema-style focus and iris gears that share the same position across the lenses in the Xeen set. The common 114mm front diameter allows for quick lens changes when using a matte box and focus accessories. The focus ring rotates 200° from close focus to infinity; this gives you a high degree of precision when adjusting focus. The lens mount can be shimmed, and additional mounts (available separately) may be used with the lens.

20mm Lens Covers Full-Frame Sensors    Suitable for 6K Image Capture    Internal Focus Design    Additional Mounts Available    Multi-Coating for Color Consistency    Dual Side Focus and T-Stop Scales    Cinema Gearing for Focus and Iris    200° Focus Rotation    114mm Front Diameter

This is a 20mm lens that has an image circle that covers a full-frame sensor. When mounted on a camera with a full-frame sensor it provides you with a wide angle of view.

The lens features metal construction to withstand the rigors of daily production, and comes with a support foot that can help take strain off your camera's lens port.

Dual right and left side focus and T-stop scales allow your focus puller to work from either side of the lens, without having to flip the lens in the mount, or facing upside numerals.

Each lens in the XEEN series share common focus and iris gear ring positions, which speeds up lens changes as accessories such as follow focus units or iris motors don't have to be re-positioned.

The common 114mm front diameter allows for quick lens changes since you don't have to swap out any donuts or adapters to use the same matte box.

The non-rotating front allows you to use optional clip-on matte boxes.

Click-less aperture ring for smooth iris pulls.

A minimum focusing distance of 8" allows you to get up close to your subject.

Related Questions and Answers

Q: 1. Is there thread for screw on lens filters? What mm?

A: Yes, these are 114mm threads.

Q: 2. I wanna know if this lens breath?

A: Yes, this lens will exhibit some breathing.

Q: 3. Are the EF mounts active or passive? (i.e. are there electrical contacts for aperture info feedback or not?)

A: The Xeen lenses are entirely manual and do not have an electrical interface.

Q: 4. This lens accepts filters? How many millimeters?

A: It will accept 77mm filters.

Q: 5. do these lens support 8k?

A: yes this lens will resolve beyond 12K.

Q: 6. 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: 7. what is the filter diameter ???

A: Like many cine lenses of old, this lens does not have filter threads. It has a 114mm front diameter sized for use with 114mm matte boxes that will hold the filters. If you wish to mount filters directly, you can use this this adapter and it will allow you to mount 4.5 round filters. Schneider 114mm SSLR to 4.5 Adapter Ring B&H # SCFH114

Q: 8. What would be the crop factor when using this lens on a BMPCC 6K?

A: The crop factor of the Pocket Cinema Camera 6K is 1.5x. This 20mm lens will be the equivalent of a 30mm lens on that camera.

Q: 9. What is the gear pitch on the lens rings?

A: The gear pitch for these cinema lenses is the industry standard of 0.8mm. The other pitch 0.6mm is reserved for ENG 2/3 lenses and is very, very rare to have it on cinema lenses.

Q: 10. What is the image circle size (mm) for this series of lenses?

A: The Rokinon Xeen 50mm T1.5 Lens for Canon EF Mount is part of the Xeen series. The company says all of them cover full frame which has a diameter of 43.27mm.