The 57mm Push-On Lens Cap from Schneider is a simple, soft plastic slip-on style cap designed to protect the front or rear elements of a lens when not in use. The cap fits lenses that have a front or rear ring with an outside diameter of 57mm; this size differs from the threaded filter ring diameter of a lens.

Soft Plastic, Slip-On Design    For Lenses with 57mm Outside Diameter    Protects Lens Elements When Not in Use

Related Questions and Answers

Q: 1. Will this work well with the 42mm lens shade for a Pentax 8x42 7.5 monocular?

A: Be sure that the outside diameter of the shade is 42mm. A typical 42mm filter is larger than 42mm at the outside diameter. I have B&W filters, and they are 2mm larger than the thread size. So if I need a cap for a 50mm filter, the cap has to be 52mm. I would recommend you measure the shade to be absolutely sure.

Q: 2. Will this fit the Olympus 300 mm f/2.8 for 4/3 format cameras? I'm looking for an easy on/off cover when I'm packing light (without the front hood). Otherwise, and exact ID (measured with digital calipers) of the hood or OD of a lens it works on would be great. Thanks!

A: I don't think so. The Cap ID is exactly 120 mm or 4.723 as measured with a precision Digital Caliper.Measure the lens that you have.Joe

Q: 3. How deep is it? I want something more than 10mm.

A: This cap is about 5.6 mm deep on the inside edge.

Q: 4. Would this work on a 43.5mm lens (Olympus 35RC)?

A: The Kaiser 43mm Push-On Lens Cap might be too tight for a lens that diameter is 43.5mm. This one might fit better, https://bhpho.to/2Hnix68

Q: 5. hello, will the 56mm kaiser push on cap fit on a canon g5xmk11?

A: The lens can not work with a lens cap. It will slip off.

Q: 6. Lens cap for binocular. I need 2 lens caps fir my compact binoculars. Barrel diameter 31mm. A push on cap. Do you have anything suitable?

A: Unfortunately binocular caps are often brand and model specific. I would recommend that you send us an email with your brand and model to: sportoptics@bhphoto.com and we can check if we have something that fits.

Q: 7. will this lens cap fit my 85mm 1.8 canon lens?

A: No. It's too big to fit this lens. The 85mm will fit 82mm filter thread. I think you will need the 61mm Kaiser cap

Q: 8. I see that you listed an outside diameter of 110mm. What is the inside diameter?

A: The diameter listed is for the outside diameter of the lens barrel it fits so it's referencing the inside of the cap less a small amount for a friction fit.

Q: 9. Is this lens cap hard plastic or soft (e.g., rubber)

A: The cap is hard plastic not rubber. It has a little flexibility but not like rubber.

Q: 10. Will this fit over a 24mm filter thread ring? Specifically a 24mm Heliopan UV filter on a Rollei 35 Tessar.

A: Yes, the Schneider 25mm Push-On Lens Cap can fit over a Heliopan 24mm UV filter mounted on a Rollei 35 Tessar.