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Once again: Leica IR E39 filter + o-ring mont on CV15mm


usm

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Hi!

I just got an o-ring from Luca an I have a really hard time to squezze the E39 filter with the o-ring mounted on the CV15mm?

 

Any suggestions or tips?

 

Thanks

Mario

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Don't use an O ring, use sellotape. One really long strip, cut with a scalpel to about 1.5 mm wide and then wrapped two or three times around the perimeter for the filter, and it will stay in place beautifully... quick and easy and highly effective...

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I agree, I loved that post showing the o-ring and while I'm pretty handy mechanically and have amassed a beautiful collection of o rings just waiting for my Leica filter to show, I'll be damned if I could get the filter down on the CV15 with the o-ring on it. After smudging the filter repeatedly I walked over to my art bin, grabbed some black photo tape (looks like black masking tape only a little thicker), wrapped a thin strip (cut with an x-acto knife) around the filter edge and nudged it on in.

 

I really wanted the o-ring to work -- clean, Leica-like solution and all that, but the tape works better and you can custom fit depending on how much tape you use.

 

Mark

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Hi!

I just got an o-ring from Luca an I have a really hard time to squezze the E39 filter with the o-ring mounted on the CV15mm?

 

Any suggestions or tips?

 

Thanks

Mario

 

Mario,

 

I finally managed to fit mine yesterday evening. I think I had to try around 10 times, divided between three evenings, before making it: the folks who said it was a tight fit really love euphemisms :-)

 

Anyway, the only suggestions I have is to arm yourself with a LOT of patience, and use your fingernails to keep the O-ring from bulging.

 

Good luck,

Luca

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Mark, excellent suggestion. I did it too, reasonable easy. But to make it really easy, I screwed two old UV filters to the IR/UV filter. One on top, one on bottom.

 

Then I applied the tape which went on much simpler usig the wider surface of three filters. Then I trimmed along the filter dividing lines - having left just a bit of space between the filters for the knife edge.

 

Then I took of the bottom filter, pushed in the two remaining ones - with the IR/UV filter closer to the lens - in reverse of course, or it touches the lens.

 

Then I removed the remaining old UV filter from the outside and trimmed along the sunshade to fully hide the tape.

 

Looks neat and seems(:)) solid.

 

Many thanks for all the experimentation and the fine suggestions.

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Is it possible to mount the IR filter from Leica in reverse order on the CV15mm lens?

 

Are the two sides different?

 

I tried really hard to mount it with the o-ring - no way.

So I'm using tape, but the filter touches the front lens.

 

Can I use the filter from the other side?

 

Thanks

Mario

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  • 1 month later...

If no one else has mentioned this, I'd like to say that the referenced lens/filter scheme will produce heavy vignetting when used with a full-frame, non-digital, Leica.

 

I didn't bother to remove the filter when shooting two rolls of Tri-X.

 

Forewarned is forearmed. :o

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I took an old innertube from a bicycle, cut off a ring (from one tube you can make 500 rings) and stretched it around the filter.

When you start with a ring from about 10 mm wide it is easy to handle. Afterwards you can cut off what is beside the filtermount.

It fit perfect.

 

Good luck,

 

Co

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I second the velcro strips.

 

I struggled with selotape and O rings, but the velcro is perfect - you can slip the filter on and off quite easily, which is ideal for panoramas.

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I mounted mine in reverse because - as you write - otherwise it touches the lens. Previous entries noted that it made no diffrenece but I made no tests. Good luck.

 

Owee! When I saw this post I realezed that the filter on my CV15 was touching the lens.

 

For those of you who have not make this mistake -- it blurs all the pictures taken with the lens.

 

I reversed the filter and the pix are once again, well, pix.

 

I'm waiting for Milich's adapter.

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Speaking of which...For those for whom the cost is in budget, I'd strongly recommend the Milich adapter over any kind of O-ring, tape, etc. solution. Its much more secure and, importantly, it shades the filter and lens. The solution we've been using with pressure fitting the filter in leaves it, essentially, unshaded and very vulnerable to flare.

 

In other words, I think that the Milich solution makes our temporary approach obsolete so long as one has the money needed for the former.

 

Cheers,

 

Sean

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Bill: your adapter will arrive tomorrow

 

jm

 

John, that's great news. Thanks.

 

I'm really looking forward to it -- and not just because the pix are so good looking.

 

You make the best stuff!

 

Regards,

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You guys convinced me too. I just sent an order to John. This way the tiny cs15 will rest between two pieces made by John Milich.

 

George, you're right, we need a name for John's stuff:

 

Millwich (for adapter and hood sandwich on either side of a CV lens),

WATEhood,

double intender (for a possible forthcoming double hot-shoe adapter, with pc connection) as in double entendre,

 

Or perhaps a new adjective, like "JLM quality," to denote items manufacturd to a high standard.

 

Or a new noun, "jlmagination," denoting far-seeing creativity of machined goods for photographers.

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