
Protect your camera's lens from harm when it's not in use with this Insignia™ NS-LC405 40.5mm lens cap that features spring-loaded clips to ensure a secure fit and simple removal. The durable construction ensures lasting use.
Q: What does the 40.5 refer to? Is this the inner or outer diameter of the lens that is covered?
A: Inner diameter, where the screw threads are.
Q: Lens filter
A: You might want to try downloading manual or looking for images on Google
Q: Will snap on lens cap work?
A: You have to get one that fits your lenses specific size; so look at your lenses and go from there.