cap fall off

Kinz · Feb 21, 2009

Now for the next question....When I use my thin Cir-Polarizer, which I bought because of the vignetting, it isn't thick enough to use a snap-on cap. The filter came with a rubber cap, but it falls off a lot. Is there any type of thing -- elastic, clip....that will hold the cap on? I know this seems trivial, but I don't want the filter scratched, and it's getting old worrying about and checking to see if the cap is on or off. Thanks.

Big Mike · Feb 21, 2009

Maybe try heating up the rubber cap and bending it a little bit so that it forms a little tighter. I've seen people do this with plastic lens hoods.

Kinz · Feb 21, 2009

I thought about that, but it's a flexible cap so I'm not sure how good it would keep the shape...or even if it would get to a shape that would stay. It's very rubbery/flexible now.

Phranquey · Feb 21, 2009

Get yourself a "pinch" cap. It fits inside the threads, so you buy them based on the filter size. I have them on all my lenses....It's about the only way to get a cap on and off with a hood on, aside from removing the hood everytime you want to take the cap off, plus they are pretty secure.

Google "Nikon pinch cap"

Kinz · Feb 21, 2009

That's the problem, there are no threads. The filter is a thin polarizer to use with a 18-50mm lens. I was having vignetting problems so I got this filter and it has no threads on the other side; the glass is right at the edge.

Phranquey · Feb 21, 2009

Kinz said:
That's the problem, there are no threads. The filter is a thin polarizer to use with a 18-50mm lens. I was having vignetting problems so I got this filter and it has no threads on the other side; the glass is right at the edge.

OOPs...didn't realize that. I have a thin polarizer that does have front threads....sorry 'bout that. I thought you were describing a cap that fit around the outside, so now I see your quandary.

Overread · Feb 21, 2009

I am sure I have seen sock like lenscaps - which have a sock like section which fits over the front of the lens and then a cap at the end.
that might be more suited to covering your setup, but I have no brand or name to search with for a result - sorry

Phranquey · Feb 21, 2009

Overread said:
I am sure I have seen sock like lenscaps - which have a sock like section which fits over the front of the lens and then a cap at the end.
that might be more suited to covering your setup, but I have no brand or name to search with for a result - sorry

That's similar to what is on my 500mm....don't know why I didn't think of that....:blushing:

I'm just batting 1.000 today........

JustAnEngineer · Feb 21, 2009

Do you mean something like these hood hats?

MikeBcos · Feb 21, 2009

This doesn't help your problem but for others who may be considering buying a polarizer, I bought one that was oversize for my wide angle lens, the lens has a 55mm thread, I bought a 62mm filter and an adapter ring. Part of the reason was that my largest lens needed a 62mm filter and I didn't want to buy more than one polarizer, but it does also solve vignetting problems.