The 45.5mm 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 45.5mm; this size differs from the threaded filter ring diameter of a lens.

Soft Plastic, Slip-On Design    For Lenses with 45.5mm Outside Diameter    Protects Lens Elements When Not in Use

Related Questions and Answers

Q: 1. Would this fit a 25 mm 0.95 Voightlander lense

A: If you are referring to the Voigtlander Nokton 25mm f/0.95 Type II Lens for Micro Four Thirds B&H # VO25095M43 MFR # BA259M2 that lens uses a 52mm lens cap.And this is one of many 52mm lens caps Sensei 52mm Center Pinch Snap-On Lens Cap B&H # SELC52 MFR # LC-52.

Q: 2. this 45mm measurement is inside diameter????

A: Hi--since this is designed for a lens with a 45mm diameter, the actual diameter of this is slightly more than 45mm, probably 47-50mm.

Q: 3. What is the material?

A: They are plastic, not metal or rubber.

Q: 4. Is 43mm the inside diameter of this cap?

A: Yes. Sizes are inside diameter of the cap

Q: 5. Will this push-on cap fit my Minolta MD Rokkor-x 50 mm 1.7?

A: A 50mm lens does not typically refer to the filter threads and or lens diameter. This lens happens to take a 49mm filter but that is the inner diameter of the lens. Your lens is probably anywhere from 51-54mm. Most people buy 2 or 3 different sizes and return the ones that don't fit.

Q: 6. does it fit a Pentax da 40mm lens?

A: As long as the lens is 40mm in diameter, this lens cap will fit.

Q: 7. Does this fit the Leica APO-Summicron-M 35mm f/2?

A: The Leica APO-Summicron-M 35mm f/2 ASPH lens (Black) has an outer diameter of 53 mm, so the Kaiser 53mm Push-On Lens Cap should fit.

Q: 8. Is this cap fit on the hasselblad zeiss 50mm C f/4?

A: Do not know that is not what it was purchased for.

Q: 9. 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: 10. can this be used on a fujifilm fujinon 135mm f5.6 rear lens?

A: I completely concur with Gaston. The best way is to measure the rear mount and even then i would order multiple sizes just to make sure you get the correct one and then just return the others that do not fit perfectly.