The Movcam 104:85mm Step-Down Ring for Clamp-On MatteBoxes lets you mount 85mm lenses onto 104mm clamp-on matteboxes -- the kinds without a thread on their rear adapter.

The ring is split along a point of its diameter to flexibly widen and mount a mattebox. (A locking pin on the side of the mattebox securely tightens the ring in place.)

Split Ring for Clamp-On MatteBoxes

Related Questions and Answers

Q: 1. Does it come with hood?

A: Yes. The following items are included with this lens:Sony FE 85mm f/1.8 Lens ALC-SH150 Lens Hood ALC-F67S 67mm Front Lens Cap ALC-R1EM Rear Lens Cap

Q: 2. Is this an exact same product as the Samyang 85mm f1.8 ED UMC CS, apart from the branding? I kept reading some very good reviews on that lens and would really like to add that to my aps-c portrait arsenal but this shows up as a Rokinon instead. Your clarification is much appreciated. Thank you so much.

A: Yes, the 85mm f/1.8 Lens for Sony E would be the same as the Samyang 85mm F1.8 ED UMC CS lens, simply branded under a different private-label brand name.

Q: 3. Can this work on panasonic G7 or Gx85?

A: Yes, the Rokinon 85mm f/1.8 Lens for Micro Four Thirds would be compatible for use on the Panasonic Lumix DMC-G7 and the Panasonic Lumix DMC-GX85 Mirrorless Micro Four Thirds Digital Camera. Do note that the Rokinon 85mm f/1.8 Lens for Micro Four Thirds is a fully manual lens, and you would have to focus the lens manually and adjust the aperture using the aperture ring built onto the lens, not via the control dial on your camera.

Q: 4. I am using the Canon EOS RP, and I need to know if this lens supports the focus assistance that can help to get items in the focus area or no.

A: Yes, you can use the Manual Focus assist features of the Canon EOS RP Mirrorless Camera when using the Rokinon 85mm f/1.4 Lens for Canon RF. You can use the Focus Peaking as well as the Magnification feature.

Q: 5. How does the image quality compare to the Canon 85mm 1.8?

A: I used to shoot with the EF85mm 1.2 and at the same aperture, the lenses would be very similar in their drawing, I think the Sony is sharper.

Q: 6. Well this work on a m50ii w an adapter

A: The Rokinon 85mm f/1.8 Lens for Canon EF-M attaches to the M50 II with out an adapter. It is a EF-M mount lens. Note it is a manual lens. So, it has manual focus only. And the aperture is controlled from the lens not the camera.

Q: 7. With crop factor on sony a6300, how far do I need to stay away from the subject when I use this lens?

A: 2.63 feet - closet you can focus with the lens.

Q: 8. Is this optically different from their F-mount version?

A: The optical design is the same for both lenses. Only the mount is different.

Q: 9. Where the lens made ?

A: The box says Made in China

Q: 10. Will it work well with the a7r iii

A: Its the best lens for the price and the quality is as good as the Zeiss 85 mm 1.8