Summitar 50 filter thread specifications

[wlaidlaw]

I have more or less given up trying to find an SNHOO Summitar lens to e39 filter adapter. S K Grimes have offered to make me one for a reasonable price ($65) but I have to tell them the exact specifications I need. The e39 side of the adapter is easy, as that is just a normal female parallel sided 39mm diameter x 0.5mm pitch thread. However does anyone know for certain, the correct technical specifications of the male tapered filter thread, which will screw onto the front of the Summitar 50. I need the maximum and minimum diameters, the thread pitch and the taper angle. I will also ask at Solms when I am there on next Monday, as one of the older guys might remember.

Wilson

[rtphotos]

Hi Wilson,

When you meet with the Solms people, can you ask if Leica has an official name for the summitar filters, please? I read somewhere that they were designated as "L series filters", or some such.

Just curious.

thanks!
rt

[jc_braconi]

If you want to use Summitar filter on E39 lens you nee a SOOQR
You can read the name of a yellow filter on the box

[wlaidlaw]

JC,

It is the other way round. I want to use an e39 on a Summitar lens.

RT,

Leica visit was a bit of a wash out. Stefan Daniel was not there when I arrived and apparently had "family problems". I therefore got the standard factory tour from a very pleasant young guy, Michael Agel from the press and PR department. I think any questions regarding the technical spec of a Summitar filer thread or an SNHOO adapter would have foxed him. Not sure where to try next. I might give Malcolm Taylor a ring.

Wilson

[jc_braconi]

OK Wilson it was not enough clear for me in your inquiry, I have seen one of this adaptor on Ebay recently. I do not know if I have the gauge for this thread to check the pitch I will try to see tomorrow
for the minus maxi diameter of a Summitar filter we have 36.3mm 36.7mm

[summitar*]

Hi JC,

where did you get this information? I think the average diameter is 36.4mm and not 36.5mm but maybe I'm wrong.

Regards,
Michael

[jc_braconi]

Originally Posted by summitar*

Hi JC,

where did you get this information? I think the average diameter is 36.4mm and not 36.5mm but maybe I'm wrong.

Regards,
Michael

As Wilson want to have a ring made

I measured one Summitar filter with my caliper to have the heigth of the thread : 0,4
the minus maxi diameter of a Summitar filter thread is 36.3mm for the bottom of the thread, 36.7mm for the top of the thread.
hoping to be enough clear.

Here is what you looking for :

[brianv]

A Summitar type "A" filter should be inexpensive, I found one at a photo show for $2. You could purchase one and provide it to the machine shop. I took the glass out of the filter and made it into a Series VI filter holder.

[rtphotos]

Originally Posted by wlaidlaw

RT,

Leica visit was a bit of a wash out. Stefan Daniel was not there when I arrived and apparently had "family problems". I therefore got the standard factory tour from a very pleasant young guy, Michael Agel from the press and PR department. I think any questions regarding the technical spec of a Summitar filer thread or an SNHOO adapter would have foxed him. Not sure where to try next. I might give Malcolm Taylor a ring.

Wilson

Thanks, Wilson. I'm sure the tour was interesting, though!

Too bad S.K.Grimes doesn't keep the SNHOO plan in file. Suggest it, and warn them that a buhzillion LUF summitar users will be submitting orders very soon.

rt

[wlaidlaw]

Carl Bretteville has told me he has just had a SNHOO made by Don Goldberg, so that is the route I will go. S K Grimes wanted a lens to check the fit. After an experience of sending a lens to the US from France for repair some years ago - never, ever again; reams of paperwork and they still tried to charge me duty, which I had to pay and reclaim, which took months.

Wilson

[rtphotos]

Originally Posted by wlaidlaw

Carl Bretteville has told me he has just had a SNHOO made by Don Goldberg, so that is the route I will go. S K Grimes wanted a lens to check the fit.

Good to hear that there are alternatives to getting a machined SNHOO copy. Please let us summitar users know how this goes.

By the way, are you going to have Mr. Goldberg cut a grove into it so the Leica clip-on lens hood would fit properly. Apparently, from reading a recent photonet thread, SK Grimes does this upon request:

Leica 50mm f/2 Summitar lens M39 Screwmount - 1950 - Photo.net Leica and Rangefinders Forum

rt

[wlaidlaw]

Originally Posted by rtphotos

Good to hear that there are alternatives to getting a machined SNHOO copy. Please let us summitar users know how this goes.

By the way, are you going to have Mr. Goldberg cut a grove into it so the Leica clip-on lens hood would fit properly. Apparently, from reading a recent photonet thread, SK Grimes does this upon request:

Leica 50mm f/2 Summitar lens M39 Screwmount - 1950 - Photo.net Leica and Rangefinders Forum

rt

RT,

No, I am going to use a chrome Elmar-M 50/2.8 hood. Now I think this may vignette on film on my IIF but should be fine on an M8. For film, I will probably use a rubber B+W hood. The main purpose of this exercise is to be able to fit a UV/IR filter on the Summitar for use on the M8. I am looking for a gentler lens for portraits. The 50 ASPH Summilux is a touch on the hard/contrasty side for this purpose. The 75 Summarit is better but at an EFOV of 100mm on the M8, a bit on the long side. I will let you know how I get on. DAG has to find an old but good condition Summitar filter ring first.

Wilson

[rtphotos]

Originally Posted by wlaidlaw

I will let you know how I get on. DAG has to find an old but good condition Summitar filter ring first.

Wilson

I'm interested in knowing how this turns out. Do report back here and let us know the outcome.

Ritz Collectibles has a bunch of Summitar filters, in case DAG is still looking.

My recently purchased Summitar has just returned from an overhaul. I'll be trying it out on the M8, too.

rt

[LeonardT]

Originally Posted by rtphotos

I'm interested in knowing how this turns out. Do report back here and let us know the outcome.

Ritz Collectibles has a bunch of Summitar filters, in case DAG is still looking.

My recently purchased Summitar has just returned from an overhaul. I'll be trying it out on the M8, too.

rt

You guys are still going about this the hard way if all you want is a UV/IR filter for the Summitar. The Summitar BW filters were made two ways. One has the glass held in place with a spanner type ring and the other has the glass held in with a press in ring. The glass in the spanner ring filter is exactly the same diameter as the glass in the Heliopan 39mm UV/IR filter. Just get the two filters and exchange the filter glass. It takes all of 15 minutes or so. The trick is finding the Summitar filter with the screw out ring. Don't try Ritz. I had them go through all of their Summitar filters and they are the press in type. Also don't use B+W UV/IR filters. I haven't been able to get the filter glass out. I have made two filters so far.

It looks beautiful. Like this.

[rtphotos]

Originally Posted by LeonardT

You guys are still going about this the hard way if all you want is a UV/IR filter for the Summitar.

Hi Leonard,

Great job and good idea! But that's not "all I want".

I can't speak for Wilson, but what I want is to be able to use my existing collection of 39mm filters on EACH and ALL of my 39mm lenses (summicrons, elmarit, ultron, apo-lanthar, and the SNHOO-equpped summitar, etc.). The SNHOO allows me to do that.

And on the Summitar, I have the added benefit of also being able to use an inexpensive screw-in hood attached to either the filter or directly to the SNHOO.

rt

[LeonardT]

Originally Posted by rtphotos

Hi Leonard,

Great job and good idea! But that's not "all I want".

I can't speak for Wilson, but what I want is to be able to use my existing collection of 39mm filters on EACH and ALL of my 39mm lenses (summicrons, elmarit, ultron, apo-lanthar, and the SNHOO-equpped summitar, etc.). The SNHOO allows me to do that.

And on the Summitar, I have the added benefit of also being able to use an inexpensive screw-in hood attached to either the filter or directly to the SNHOO.

rt

The problem with the SNHOO adapter is it's almost impossible to find. Since I already have a nice collection of Summitar filters, using my 39mm's isn't an issue. I also find that the Summicron 12585 hood locks in between the filter and the lens.

I know Wilson has been looking for an adapter for awhile now. Good luck to both of you.

Cheers,
Len

[wlaidlaw]

Len,

As RT says, I want to play around with other filters and I too already have quite a few e39 ones. I also have an e39 to e52 adapter ring and a set of 52 mm IR B+W filters. With its creamy rendition, the Summitar might be an excellent lens to use for IR. It has the advantage of having an IR focusing mark. I also want to use an Elmar-M 50 chrome hood rather than my "barndoor", so I think that the DAG-SNHOO is the right answer for me.

Wilson