ltm to m mount

seanE · Jan 17, 2016

I'm looking to sell all my gear, And buy a sony a7, Leica m2, And voigtlander 40mm 1.4, 15mm 4.5, I see the LTM 15mm's are cheaper, So I'm thinking of getting a adopter, Why dose it say for 50 to 70mm lenses? seeing that the lenses dose not have rangefinder coupling, I don't see how there could be a problem.

http://www.ebay.ie/itm/Detachable-M...351214?hash=item45fcff932e:g:AJAAAOSwBvNTq9Ww

pdeeh · Jan 17, 2016

Because on an M-series camera, using the "correct" adapter will automatically pop the correct framelines into the viewfinder when the lens is mounted.

(the Leica gurus/obsessives will have to chime in to say if this is true only of a certain subset of M-series cameras or not)

You can mount just about any LTM lens on an M camera using any adapter, but as well as the framelines thing, note that some adapters will not allow mounting LTM lenses with infinity locks. (You'll need to research the difference between a Voigtlander Type I and Type II for this)

Note that if you want to use a 15mm heliar or similar, and want a viewfinder that offers the correct angle of view for framing, you'll need an accessory viewfinder - these are not inexpensive btw

Ko.Fe. · Jan 17, 2016

Me either. You'll need external VF anyway.

Sony sucks with RF UWA lenses, BTW.

Xmas · Jan 17, 2016

pdeeh said:
Because on an M-series camera, using the "correct" adapter will automatically pop the correct framelines into the viewfinder when the lens is mounted.

(the Leica gurus/obsessives will have to chime in to say if this is true only of a certain subset of M-series cameras or not)

You can mount just about any LTM lens on an M camera using any adapter, but as well as the framelines thing, note that some adapters will not allow mounting LTM lenses with infinity locks. (You'll need to research the difference between a Voigtlander Type I and Type II for this)

Note that if you want to use a 15mm heliar or similar, and want a viewfinder that offers the correct angle of view for framing, you'll need an accessory viewfinder - these are not inexpensive btw

Most LTM Cosina lenses came with a kit finder, there was also a spirit level/double shoe option.

mdarnton · Jan 17, 2016

One reason to avoid the old 15mm is, I believe, that the newest one has been redesigned to work well with digital cameras. Lenses with short back focus distances, like the old 15mm, don't work best with digital sensors.

cobbu2 · Jan 19, 2016

One reason to avoid the old 15mm is, I believe, that the newest one has been redesigned to work well with digital cameras.

The old 15mm is fine. I have the original LTM 15/4.5 Voigtlander Super Wide Heliar and I use it regularly on my M8 using a LTM to M adapter with great results (also using the accessory viewfinder). There are numerous examples on my Flickr page. Keep in mind on the M8, the "equivalent 35mm" field of view is 20mm.

Xmas · Jan 20, 2016

cobbu2 said:
The old 15mm is fine. I have the original LTM 15/4.5 Voigtlander Super Wide Heliar and I use it regularly on my M8 using a LTM to M adapter with great results (also using the accessory viewfinder). There are numerous examples on my Flickr page. Keep in mind on the M8, the "equivalent 35mm" field of view is 20mm.

But the M8 has offset micro lenses and 6 bit vignette coding? Only some D cams like the XCR will be similar...

seanE · Jan 22, 2016

I thought only the a
sony A7R had trouble with wide angle lenses?
or are yous referring to some other problem?

aoresteen · Jan 22, 2016

mdarnton said:
One reason to avoid the old 15mm is, I believe, that the newest one has been redesigned to work well with digital cameras. Lenses with short back focus distances, like the old 15mm, don't work best with digital sensors.

There are two new versions. The 15mm II was changed to M mount and allows for 52mm front filters. It is the same optical design as the 1st LTM version.

The 15mm III had changes to the optical formula and is said to be better with digital cameras.

I have the 1st version in Leica 39mm screw mount and have yet to use it on a digital camera so I can't say how it does.

250swb · Jan 23, 2016

cobbu2 said:
The old 15mm is fine. I have the original LTM 15/4.5 Voigtlander Super Wide Heliar and I use it regularly on my M8 using a LTM to M adapter with great results (also using the accessory viewfinder)..

But your M8 is a crop frame camera. The problem with smearing of corner detail only occurs on full frame digital cameras, on your M8 you don't get to see the full coverage of the lens so while it may be great it is not to be recommended without that caveat.

To the OP, you need a 28mm adapter just for neatness, it simply means you have a less cluttered viewfinder for focusing.

Steve

macfred · Jan 25, 2016

Some maybe useful informations about Voigtländer LTM to M Adapters on Stephen Gandy's cameraquest.com

https://www.cameraquest.com/adaptltm.htm

https://www.cameraquest.com/adaptnew.htm

cobbu2 · Jan 29, 2016

250swb said:
But your M8 is a crop frame camera. The problem with smearing of corner detail only occurs on full frame digital cameras, on your M8 you don't get to see the full coverage of the lens so while it may be great it is not to be recommended without that caveat.

That's quite true; its 15mm is cropped to a 20mm equivalent angle of view, so no vignetting issues. But it works great on my M6!

Xmas · Jan 30, 2016

250swb said:
But your M8 is a crop frame camera. The problem with smearing of corner detail only occurs on full frame digital cameras, on your M8 you don't get to see the full coverage of the lens so while it may be great it is not to be recommended without that caveat.

To the OP, you need a 28mm adapter just for neatness, it simply means you have a less cluttered viewfinder for focusing.

Steve

No abstract the M8 a cropped sensor is still designed (like the M9) for non retro focus lenses eg offset micro prisms and vignette compensation.
The Ricoh XCR is similar with its M style mount...
If you use a wide on normal digitals it won't be comparable.

ltm to m mount

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