Bower 37mm Lens Cap

It fits my 37mm lens perfectly and clicks securely in place, no wobble at all. The simple design does exactly what it should—keeps dust off the glass when the camera’s not in use. For the price, it’s a solid little protector.

Finally found a lens cap that snaps on with a satisfying, secure click instead of feeling like it'll fall off. The center pinch design makes it easy to pop on and off one-handed while I'm switching lenses.

Feels solid enough that I trust it to keep dust off my lens when I toss it in my bag. The center pinch mechanism clicks securely without being too stiff to operate.