Summaron 2.8 with both screwmount and M-mount

[terrafirmanada]

I have just acquired a Summaron 2.8, ser: 1,782,5xx, and I think it is both M-mount and screw mount. It has the same screw configuration as this cron, which is also both:http://photo.net/bboard/uploaded-file?bboard_upload_id=38226684
If so, how rare is this lens? Anyone else have one of these that can confirm it is both? (I am away from home and without proper screwdriver).

 

[terrafirmanada]

Roland, Thanks, but I had the goggled 3.5 and that mount was quite different. The current lense I have is not goggled, but it is the 2.8. The lense in the pnet thread I also understood to be non-goggled.

Thomas

 

[terrafirmanada]

Oh my lens focuses to .7. I see the confusion I created.

 

[lns]

Can you explain a little more, please? I have a Summaron 35/2.8 that focuses down to 1 meter. It was advertised as an M mount, but I later realized that it was a screw mount with an LTM to M adapter tightly attached. (It was my second Leica lens, so I was a little ignorant.) It is serial number 16672xx. Since mine has the 1 meter minimum focus distance, it's just a run of the mill screw mount, right? (I hope so, because I use it, rather than have it on a shelf.) Thanks! -Laura

 

[terrafirmanada]

Appearantly some lenses were made to be both m-mount and screw mount as well as a marketing ploy to get Leica screwmount users to consider the m line of cameras. That wat the single lense could solve two problems. These lenses have an m adapter which is then secured to the body of the lense with a retaining screw (or so I am told). I have not disassembled mine yet to see if this is true.
I was hoping some folks here would know more about it. It is possible that there is confusion, and the lenses are only the goggled versions, and would not couple properly on a screwmount.

 

[Harry Lime]

Way back when the M3 came out Leica shipped some of the first lenses with a semipermanently attached LTM to M mount adapter. It was fastened with a screw. Perhaps this is one of these lenses?

 

[Stu W]

Laura has the rare one. The "run of the mill" screwmount Summaron is the collectible. Very few were made. Thomas's is the "grub screw" model, which can interchange between the thread mount and M mount bodies. AFAIK. Stu

 

[terrafirmanada]

I thought I would follow up on this thread. Found this listing on the big site: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=280041290778&ssPageName=STRK:MEWA:IT&ih=018

 

[terrafirmanada]

So, this is the type of lens I was talking about. And probably not too rare. I realise the first example I posted was the gogggled version (.65) close focusing, but the other one is the same as my lens. I have not pulled mine apart yet, since I do not have the proper size screwdriver, but probably will one day for curiositys sake.

 

[lns]

Geez, I had forgotten about this. If mine is the rare one, I'm kind of amazed. Usually I'm the buy-high-sell-low person.

Well, I've been using it, and I guess I'll keep using it. It's my only 35mm lens.