The ARRI EF Mount LBUS for Cinematic Camerasis an EF lens mount with an LBUS connector and reduced internal reflection properties that ensure the full contrast of the image from the lens reaches the sensor. This EF mount (LBUS) has a wide light baffle that illuminates both Super35 and large-format sensor areas. It allows control of the electronic iris in many EF lenses through the camera menu and ARRI ECS devices. It also allows the use of the electronic image stabilization found in some EF lenses.

Fits ALEXA 35, Mini & Mini LF Cameras    Use with EF-Mount Cine or Still Lenses    Lens Data & Wireless Lens Control    Iris Control for Select Still Lenses    Robust Design

• ALEXA Mini LF
• ALEXA Mini
• ALEXA 35

This mount's wider light baffle provides coverage for both large-format and Super35 image sensors

• Cine-style EF-mount lenses
• EF-mount still photo lenses

LBUS link for:

• Wireless FIZ lens control motors for cine-style lenses
• Iris control for select still photo lenses

Uses your ALEXA 35/Mini/Mini LF's radio for lens motor control

Power the image stabilization function of select telephoto lenses

Durable and reliable design stands up to film/television production use

Related Questions and Answers

Q: 1. I have a friend with a Celestron AstroMaster 130EQ Reflector Telescope and I have a Canon Rebel T3i. Will this work to join those two items for eclipse photos?Do I need anything else for that purpose?If possible, can you confirm the diameter of the main lens on the Celestron is 130mm like the model # indicates?

A: As stated above you will need a T-adapter to go between the T-Ring and the telescope. You need to know whether the telescope accepts 1.25in or 2in eyepieces to know what size T-Adapter to get. The T-Ring is camera specific so you are good there. The T-Adapter adapts the T-ring to the telescope. Don't forget the appropriate solar filter. You can only use the telescope and camera during totality without the solar filter. The solar filter must be in place outside totality or you will destroy the camera, your eye or both.

Q: 2. what is the difference between EOS and EF lens?

A: The manufacturer should have use the term EF to denote the adapter correctly rather than EOS which is the name of the camera which uses the EF mount.

Q: 3. used with Rebel cameras do I also need an EF-S to EOS adapter?

A: Nope! This will work with EF and EF-S cameras without an adapter. You will only need another adapter if you have the mirrorless line of Canon cameras, the EF-M.

Q: 4. I am using a Sony A7S with Metabones E-mount to Canon EF adaptor. I want an EF mount TO PL mount so I can use my Fuji Cabrio 19-90 on the A7S. So I'd have TWO separate adapters to get from Sony E-mount to Canon EF to PL-mount. Will this adapter accomplish that? I think I need both adapters attached in order to clear the mirror.

A: This combination is unknown so you would be on your own as far as testing it. I would say from my years of movie camera assisting, I would not feel confident with such a set up if offered. I would be concerned with maintaining the proper depth and not feel confident it would work all day, every day. I would suggest instead that for using the the Fujinon Cabrio, use a proper PL to E-mount adapter. Keep in mind that when using the Fujinon ZK19-90mm T2.9 Cabrio Premier Lens (PL Mount) on your Sony a7S, the camera must be in crop mode since the lens is for Super35 and will not cover the a7S full frame.

Q: 5. Would this work with RED DIGITAL CINEMA RAVEN EF-Mount and putting an Cooke S4i on board?

A: No, because the rear element length from the mount is greater than 14mm.

Q: 6. Is this the 10mm T ring?

A: The T-Ring is 11mm. Canon EOS (EF) bodies are 44mm deep, and adding an 11mm T-ring will get you to the ideal 55mm spacing.

Q: 7. is this compatible with DZO Vespid primes lenses?

A: The FotodioX Pro Lens Mount Adapter ARRI PL to Canon EF is not compatible with DZO Vespid primes lenses.

Q: 8. I own a Canon 6D and a 5D M-III. I want to use these lenses on my new Sony A6400. Is this the correct adapter to purchase to fit my Sony E mount? I don't mind that it's not an electronic adapter.

A: If using Canon EF lenses originally for your Canon DSLRs on a Sony A6400 with an E mount, the Commlite Electronic Autofocus Lens Mount Adapter for Canon EF or EF-S-Mount Lens to Sony E-Mount Camera, BH # COCMEFNEXB would be a much better option. https://bhpho.to/3r6EOfG

Q: 9. will this pl to ef adaptor work with a ursa mini pl ?

A: That's right! This adapter is for PL to EF. You need adapter EF to PL.

Q: 10. Would you recommend using this with a Canon EF Metabones? I have an EF Metabones adapter on my Sony A7S and Lumix GH4 to use all my Canon glass, would there be any difference in performance between this method, or should I lose the Metabones on the A7 and just go with a dedicated E-mount between the Celestron T-mount and the A7?

A: It will work but like others have said, staying with a native lens would work best.