Kaiser 42mm Slip-On Lens Cap (206942)

This item fits quite tightly which definitely keeps it from falling off my telescope. The downside, it is nearly impossible to fit to the scope when the temps are in the low 40's. Once the scope warms up, the caps fits as before. Except for transport, I don't put the cap on until everything warms up anyway, so it really isnt too much of a problem. Would buy again if I lose this one.

This 71mm fits PERFECTLY on the front of my lens hood of my Voigtländer 75mm f/1.5. They fit great on the front of the Voigtländer metal lens hoods.

I have a rather pricey vintage camera lens and it came without a front cap which I didn't realize when I bought it. It is German and I could not find out what size lens cap to use. It would not accept a simple slip-on cap. I estimated as close as I could and ordered this. I got it today and it fits perfect. It fits exactly right. The quality looks terrific. It was well packaged and arrived safely and on time. I would definitely recommend!!!!!

After the lens cover blades on my Canon G7x mk ii were irreparably damaged during routine operation, I removed the blades, measured the diameter of the control dial, came up with 58.25mm, and found my way to this item, and immediately saw that its reviews were full of people in the exact same situation as myself.This lens cover fits snugly and securely over the camera's lens in its closed/powered off position. Its color and texture matches the camera body well enough that it looks like it was meant to be there.Only flaw-- item description states that it comes with a tether anchor, to allow the cap to be tethered to the camera body. The item I received has no connection point for a tether. If you are so inclined, you can resolve this by poking a small hole in the lens cover to thread a tether to, but this results in the whole arrangement losing a bit of its tidy appearance.

Product description specifically says "Diameters are the inside dimensions of the lens cap. This corresponds with the outside diameter of the lens (or filter) which is covered with the lens cap."Well, that's just not true. I ordered 37&46mm sizes. The 37's showed up first, and the outside diameter of the cap is the same as the filter, not the inside. So it simply cannot be made to go over the filter. Period. I contacted the seller through Amazon and never heard back.I was still waiting for the 46's and assumed I had an odd lot defect as they were so grossly off base. But the 46's were only marginally better. It takes so much pressure to make them fit, that I fear a slip of the thumb would actually break the glass in the filters.In that the seller was silent on my return request, I even tried cutting slots in the perimeter to loosen up the 37's. They are in the trash now.The 46's will go on, but are so tight they force themselves off in only a few minutes.Worthless product, and no response from the vendor. So $50 for two sets of each shot....

Made in Germany. Good material quality. Mine (68mm) is fitting perfectly a 67.8mm telescope male thread that is 5mm deep. Drilled a tiny hole in the center to avoid pressure suction! Again as they say, the diameter is the outer diameter of your lens / tube, nothing to do with filters..

The title says it all. The objective cap that came with the scope was flimsy and broke in barely a month. This is a much better cap.

I have a 50-year old pair of binoculars that lost their original lense caps just due to age deterioration. Been searching a while for replacements. These fit perfectly!