UV/IR filter for Leica Summicron-C 40mm

[James Mitchell]

I had DAG take an old screw-in rubber hood made for the 90mm-C Elmar, cut down the length of the rubber hood, then weld in a 39mm threading facing out. He put in an old piece of UV glass and the thin retaining ring. Then I took a 39mm UV/IR fliter out of its mount and replaced the glass into the hood. This is a very effective filter/hood combination for the M8.

[benkelley]

That is what I was thinking about the hood, just to get a 39mm screw in one.

It's weird, because I had read before that the Leica filters will screw in part way, but my UV/IR just wouldn't take at all. More than one B+W fit snugly, no problem... bizarre!

Thanks!
Ben

[epand56]

I know I'm late with this thread, but here is my 2 cents.
When I bought my Cron-C 40 i put a 39mm UV/IR filter on it and screwed the hood on the filter and since then anything is Ok and firm. I used it extensively, always hanging on my side with a Y-Strap, and nothing weird happened, filter and hood are always in their place.
I sometimes thought I could sell all my lenses and just keep this little gem.
But in the end, I love them all.

P.S.
You guys should try the other one, the Elmar-C 90/4. Another light and sharp little guy.

[jevidon]

I found that the 39mm B&W IR/UV filter screws into the standard 5.5 series 40mm Summicron, but don't force it since the threads may cross or spall.
I also found that the standard 5.5 series collapsible rubber hood made by Leitz/Leica threads all the way into the B&W filter very securely with no resistance.
But, since the filter is held to the lens by a few threads due to the different thread pitch, it would be a good idea to fix a lanyard from the rubber hood to the camera strap in the event that the filter wants to come loose from the lens barrel.

I found that it is a non-problem.

[como]

After waiting for months for a serie 5.5 filter I decided to go for the grinding solution of a
E39 filter. So I bought a Heliopan uv/ir E39 filter. After removing the glass out of the holder I noticed to my surprice that the glass fitted without any grinding.
I just needed a rubber ring to make it fit tight into the sunshade. Perfect solution!

Co Morriën

[lct]

The Heliopan must be smaller than the Leica UV-IR i guess otherwise grinding the hood of the filter would be mandatory.

[jevidon]

I am having a Leitz 5.5 p/n 11251 machined to accept the standard Leica 39mm filters including the IR/UV. I'll not say who is doing it until I get it back and try it. If it works, I'll tell you all about it. And if it works, it will be the most cost effective secure method of adapting these filters to the 40mm Summicron C.

[stephengilbert]

If you know the size of the O-ring you want, you can get anything from McMaster-Carr (McMaster-Carr). This is a great source for all sorts of parts and tools. The O-rings can be searched by material, shape, thickness, inside diameter, and outside diameter.

Unfortunately, you'll have to buy a package of 10 or 50, depending on the ring. But if a few people can figure out how to share a package, you can mail two or three O-rings in a one ounce letter. (A confession: I bought a package of 50 to replace the missing (oxidized) O-ring on the bottom of a Gitzo tripod center column. Mailed a bunch to people who needed them so I didn't feel so silly for spending twelve or fifteen dollars for a package of O-rings.)

[lct]

Originally Posted by jevidon

I am having a Leitz 5.5 p/n 11251 machined to accept the standard Leica 39mm filters including the IR/UV. I'll not say who is doing it until I get it back and try it. If it works, I'll tell you all about it. And if it works, it will be the most cost effective secure method of adapting these filters to the 40mm Summicron C.

Would be interesting to compare it with mine. 100% DIY but needs a bit of grinding though.

One just needs:

- a 39mm UV-IR Leica filter (#13410)
- a Leica hood #12518 dedicated to the 'cron 40/2
- a 37mm rubber ring
- a pin and a die grinder

1. Grind the filter housing of the hood in order to enlarge its inner diameter to 37mm:


2. Remove the blocking ring of the filter with a pin or same:


3. Insert the glass into the filter housing:


4. Insert the rubber ring over the glass:


5. Screw-in the hood and that's all.

[lct]

Here's the result:

[graeme_hutton]

Very neat indeed!

(from a man who simply screwed in a Leica E39 'fit and forget'!)

Best

Graeme