Cavision's Universal Lens Donut Adapter Ring snaps into select matte boxes with a 100mm rear opening and serves as an anti-reflection donut for lenses with an outer diameter between 60 to 95mm. It utilizes a flexible fabric that allows for lens travel so it is suitable for use with lenses that exhibit up to two inches of lens travel when focusing or zooming. The flexible fabric features a draw string and cord lock.

For Matte Box with 100mm Rear Opening    For Cavision Matte Box with Step-Down    For Internal and External Focus Lenses    Draw String Pull with Cord Lock

Suitable for DSLR or other external focus lenses as well as internal focus lenses without lens travel.

The flexible fabric provides an adjustable opening that you tighten to the lens to prevent light from behind the matte box flaring filters and degrading your image.

Related Questions and Answers

Q: 1. What comes with magnetic adapter ring, one ring magnetic for lens and filter? Can I but another ring for filter. Can I used my lens cap?

A: It only includes the adapter ring in the box. You will need to purchase a magnetic filter and a magnetic lens cap to use with this. If your lens cap is not magnetic it won't work unfortunately.

Q: 2. how to connect this matte box with 24mm rokinon cine lens?

A: These clamp onto the external diameter of the front of the lens - in this case 83mm diameter.

Q: 3. Would this step-down ring allow me to mount a 95mm filter on a lens with 105mm filter size?

A: Both the outside and inside threads on this have a pitch of 1.0 mm so it will work if your lens and filter threads have a pitch of 1.0 mm. In my experience most brands of 95 mm filters are threaded with this pitch. However 95 mm filters made by Formatt-Hitech have a pitch of 0.75 mm and will not fit.

Q: 4. What is the total outer diameter of this ring? Would the outer diameter of this step up ring fit snugly into the 105mm opening of my clamp-on matte box?

A: Unfortunately, there are no published measurements we could find at current time for the exact outer diameter, but the "step down" ring that is designed to take your mounting option down to a lower number, should easily mount on an opening that matches that higher number, in this case, your 105mm opening on the matte box.

Q: 5. Does the hard Ring fit into Tilta MTB-04 Swing Away Mattebox?

A: The Movcam Universal Stretch Donut's front diameter (156mm) is too large to fit into the Tilta MTB-04 Swing Away Mattebox. We recommend using the Movcam MOV-301-0205 Mattebox MM5 (2 Rotating Filter Holder): https://www.bhphotovideo.com/c/product/839022-REG/Movcam_MOV_301_0205_Mattebox_MM5.html

Q: 6. The two answers to the third question say the opposite. Can I use this step-down adaptor to put an 82 VND filter on a 95 lens?

A: Yes, the Cavision 95mm to 82mm Step-Down Adapter Ring for Wide Angle Attachments will allow you to mount an 82mm filter on a lens with a 95mm filter thread.

Q: 7. Is the outside diameter of the larger part 95mm? Or does that refer to the inside diameter?

A: The filter has an inside thread diameter of 82mm and an outside thread diameter of 95mm.

Q: 8. Will this allow me to use a lens with a rotating front to my matte box?

A: As long as the thread size matches the inside diameter of the Bright Tangerine Threaded Adapter Ring for Bright Tangerine 143 to 114 Rubber Donut, you should be fine.

Q: 9. Will work withe 95mm clamp of the wooden camera universal matteboxe?

A: No, please look into the following two items Wooden Camera UMB-1 Matte Box Clamp On Ring (143-95mm) https://bhpho.to/3sviyLk Wooden Camera Clamp-On Set for UMB-1 Universal Matte Box https://bhpho.to/3j3JLSt

Q: 10. Hi, will I be able to use this along with a 82mm UV on an APSC camera with the Tamron 150-600mm lens?

A: I used it on a tamron 150-600 at 600, I never used it at 150mm , also make sure your 82mm filter or adapter is not a wide angle with recessed lip. I used a cheap version of the Lee filter system for the eclipse.