(5 Packs) Fotasy Lens Rear Caps for M42 42mm Screw Mount Lens, M42 Lens Cap, M42 Lens Rear Cap, 42mm Screw Mount Lens Cap, M42 End Cap, fits Pentax Takumar/MamiyaSekor/Helios M42 Lens, etc

Lens end cap(mount) and camera body for Pentax K fit perfectly. Does not include front lens cap which can vary with model/thread.

Lovely set of tapitas. Fit perfectly with my old lenses.

These are dangerous unless you modify them. So There. I'll tell you how I fixed mine momentarily.The good news: Less than two bucks a piece and you get them in two days! On top of that, they come with body caps. So, for my six bucks, I got three rear caps and three body caps. Woo hoo.The bad news: These are made of stiff, brittle plastic, not the tough, resilient kind that real Leica/Nikon/Fuji/whatever rear caps are made of. I think we're talking general-purpose polystyrene here. The cheapest plastic on planet Earth.And the depth from the flange to the bearing surface on the bayonet lugs is over spec. So, the cap fits too tightly. You can't turn it to engage the bayonet. Which means if you ever accidentally pick up your multi-thousand dollar lens by the back cap, the cap will let go and launch your lens to the pavement.I fixed mine by simply sanding a few thousandths off the back of the cap until it fit properly. I just held the cap on a piece of course sandpaper and made about 100 little circular strokes. (Your sandpaper, arm and even the caps themselves will vary, so sneak up on the first one: 25 -50-75- strokes and so on.) I then used an X-Acto to smooth, deburr, and ease the edges and I was good to go.Will the cheap plastic wear out really fast? Probably. But two bucks. Who cares? We all know the cigarette lighter method for tightening worn back caps, right? But watch out. That styrene will burn like a torch. Go easy.The body caps didn't need any modification and seem to me a good alternative to the now-collectible and none-too-safe Leitz ones with the metal bayonet lugs. I had some of those. I'll use these instead. So that was an unexpected win, I'd say.

I have a bunch of mamiya lenses that all use m42 mounts so I was able to get protective rear caps for each. They fit great. Look durable. Highly recommend

Can't rate durability just yet, but they clip on easily and securely.

Exactly what I was looking for, fits snug on both the lens and camera, as durable as the name brand ones.

Screws onto my m42 lenses relatively easily. Threads are a little rough, but it works and doesn't come off easily. It's also a good number of these for the price.

I have more MFT lenses than my old knees want to carry at once, and I'm constantly swapping which one is on my camera. So the lens cap - lens combinations are constantly getting mixed. What I have noticed is that the official Olympus rear lens caps are loose on some of the third party lenses. Not good. But these fit snugly on ALL my lenses.

Exactly what I wanted for my M42 lens

These will fit any K-Mount body of lens, even 35mm !! Nothing special really but good price I think.

They fit on my MFT camera body and lens. They're snug, and don't fall off. That's all you can ask!

They are ok. They fit but not well on both the lenses and body. The thread is just slightly off leaving a small gap between the item and the cap. I guess you get what you pay for. The next ones I bye will be brand name and not third party like these ones. But if your looking for a quick cheap alternative go do these.

These worked perfectly, thank god someone makes aftermarket caps.The name brand ones (pentax) for me are outrageously over priced for a piece of plastic.Thankyou Fotasy !!!!