The 82mm Magnetic Back Cap is a filter cap compatible with the Freewell magnetic quick swap filters. Made of metal, it magnetically attaches to a 82mm quick swap filter to protect it in transport. The cap allows you to protect the filter when you don't want to carry the filter in a storage case. It's useful for times when you don't want to carry a storage case with all your filters but rather just want to take the filter(s) you need for the shoot.

For Freewell Magnetic Quick Swap Filters    Protects Filter Outside of Storage Case

Related Questions and Answers

Q: 1. Fits on elmarit 21mm2.8?

A: Yes. The Elmarit-M 21mm F/2.8 should have 55mm filter threads and this cap will fit when you are not using the lens hood.

Q: 2. Will this fit the Canon RF 600mm f4?

A: Yes, Don Zeck C10 Lens Cap for the Canon 600mm f/4 IS Lens is also compatible with Canon RF 600mm f/4 L IS USM Lens.

Q: 3. What's the material? Metal? Plastic?

A: The cap would be plastic.

Q: 4. Can you install a swing-away rod adapter here?

A: Smallrig does not offer a swing away adapter option for the SmallRig Revo-Arcane Lightweight Multifunctional Modular Matte Box Basic Bundle.

Q: 5. Do bolts come with this battery plate? How many? If only two bolts come with the plate, can someone provide a link to buy two more compatible additional bolts?

A: Mounting hardware is included, however we do not sell additional hardware.

Q: 6. Can this adapter be used in the RED V-Raptor ?

A: Yes, the Tiltaing Canon RF-Mount to PL/LPL-Mount Adapter with Adjustable Back Focus can be used with the RED V-Raptor even though it is not RED Approved.

Q: 7. I'd like to use this on a 112mm Filter Nikon Z 14-24mm f/2.8 S lens. However this box is for 114mm size lenses. Any advice?

A: The SmallRig Revo-Arcane Lightweight Multifunctional Modular Matte Box would not support your lens model. The largest front filter size it would support currently is 86mm.

Q: 8. What's the weight limit before a lens support bracket is needed?

A: The Tiltaing Canon RF-Mount to PL-Mount Adapter with Adjustable Back Focus (B&H# TIARFPL2) does not have a stated weight limit before a lens support bracket should be used. Intended motion of the camera (none, slow, or bumpy movement), lens balance, and of course weight are all important. Moreover, the lens mounts and, yes, the adapters themselves also should be taken into consideration, the latter seeming to be the very appropriate point of your question. Assuming little or no camera movement, and also especially when using a lens adapter, experienced cinematographers will typically use lens supports whenever the lens is more than 5 lbs (2.27 kg). However, it is never a bad idea to use one, especially when the lens mount is not of the locking variety. One common misunderstanding is the idea that such a support is only used to keep from damaging the lens mount on the camera. In actuality, any downward flex of the lens mount at all (even one micron) will affect the plane of focus of the lens circle on the image sensor. That's what makes lens supports so important even if no damage will result from not using one.

Q: 9. Regarding fit, how effective a seal does the Don Zeck C10 Lens Cap make? Does it make a flat seal away from the lens that the orings don't allow dust or water to get past?

A: The lens Don Zeck C10 Lens Cap for the Canon 600mm f/4 IS Lens is held in place using six O-rings, which provide a tight, perfect fit without touching the lens surface or damaging your lens. It helps protect the lens from Dust, Rain and Scratches.

Q: 10. Is it possible to use circular filters with this mattebox? And if so, what is the maximum filter thread supported?

A: The SmallRig Revo-Arcane Lightweight Multifunctional Modular Matte Box Basic Bundle fits one 4x5.65 filter. You can use a rotating (with fingerwheel) 4x5.65 filter with this mattebox.