p.1 #1 · TTartisan Leica M to Sony E adapter with 6-bit code
TTartisan to announce a new M-E lens adapter able to transmit 6-bit code to the camera. I'm not quite sure how it works but from the pictures, it looks like the adapter has a 6-bit code scanner and a focal length dial.
Currently this is only possible when using the Leica M to SL adapter so this could be exciting news to Sony shooters shooting with coded M-lenses.
p.1 #2 · TTartisan Leica M to Sony E adapter with 6-bit code
I wonder if this infringes on any Leica patents around the 6-bit coding system? It's notable that none of the non-Chinese lens manufacturers selling M mount lenses also provide the 6-bit cutouts on the lens mounts for you to fill with paint. Both 7A M-mount lenses I own are 6-bit coded...
Maybe the dial is there for uncoded lenses? Normally the 6-bit code would provide the focal length and the dial would be redundant.
p.1 #3 · TTartisan Leica M to Sony E adapter with 6-bit code
rscheffler wrote:
I wonder if this infringes on any Leica patents around the 6-bit coding system? It's notable that none of the non-Chinese lens manufacturers selling M mount lenses also provide the 6-bit cutouts on the lens mounts for you to fill with paint. Both 7A M-mount lenses I own are 6-bit coded...
Maybe the dial is there for uncoded lenses? Normally the 6-bit code would provide the focal length and the dial would be redundant.
That's a great point. The FL dial could add the focal length info to the EXIF for non-coded lenses.
p.1 #5 · TTartisan Leica M to Sony E adapter with 6-bit code
Have been using a pre production sample which didn't come with a wheel to set focal length for uncoded lenses
and also featured a narrower opening that lead to some vignetting issues with quite a few lenses.
Electronics already worked well, focal length is being passed on to IBIS.
p.1 #6 · TTartisan Leica M to Sony E adapter with 6-bit code
BastianK wrote:
Have been using a pre production sample which didn't come with a wheel to set focal length for uncoded lenses
and also featured a narrower opening that lead to some vignetting issues with quite a few lenses.
Electronics already worked well, focal length is being passed on to IBIS.
p.1 #7 · TTartisan Leica M to Sony E adapter with 6-bit code
I received one of the final production models this week.
There are some minor quirks but generally it works well.
The wheel on the adapter allows one to set 28/35/50/75/90/135mm, so the typical Leica M focal lengths.
The opening is much bigger compared to the pre production sample I had, the only
lens where I still have additional vignetting is the rather obscure MS-Optics 135mm 2.4.
VM 75mm 1.5 / Leica 90mm 2.0 / SY 50mm 1.1 / MS 50mm 1.0 (which are my M-lenses with the biggest entrance pupil) all work without any issues.
I will have an article ready when it is officially released, currently just waiting on an update when that will be.
There are some minor quirks but generally it works well.
The wheel on the adapter allows one to set 28/35/50/75/90/135mm, so the typical Leica M focal lengths.
The opening is much bigger compared to the pre production sample I had, the only
lens where I still have additional vignetting is the rather obscure MS-Optics 135mm 2.4.
VM 75mm 1.5 / Leica 90mm 2.0 / SY 50mm 1.1 / MS 50mm 1.0 (which are my M-lenses with the biggest entrance pupil) all work without any issues.
I will have an article ready when it is officially released, currently just waiting on an update when that will be....Show more →
Looking forward to your article Bastian. Did you check if the 6-bit code is translated to the EXIF when using Leica or 6-bit coded Voigtlander lenses?
p.1 #9 · TTartisan Leica M to Sony E adapter with 6-bit code
Fred Miranda wrote:
Did you check if the 6-bit code is translated to the EXIF when using Leica or 6-bit coded Voigtlander lenses?
Yes, lens name will always be "Leica M <focal length> <max. aperture>" for those.
So no lens names like Summicron or sth. like that.
p.1 #10 · TTartisan Leica M to Sony E adapter with 6-bit code
If the lens is not a focal length that is included in the options from the dial, how would the focal length be handled? Would the adapter FL value would overide manual FL value set in the IBIS settings in the camera menu?
p.1 #11 · TTartisan Leica M to Sony E adapter with 6-bit code
Abuttolph wrote:
If the lens is not a focal length that is included in the options from the dial, how would the focal length be handled? Would the adapter FL value would overide manual FL value set in the IBIS settings in the camera menu?
1st priority: 6-bit code
2nd priority: wheel
So yes, whatever you set on the wheel will be passed on to the camera.
In camera you can still override that, but I can think of exactly zero cases where that would make sense
(except for some Samyang lens with a wonky firmware where the manual said you better use the override function).
p.1 #14 · TTartisan Leica M to Sony E adapter with 6-bit code
EVIL_guy wrote:
Thanks for this quick reaction!
What I don't understand is your sentence:
"you can use the aperture wheel on the camera again to have any aperture value between f/1.0 and f/16 written in the exif data"
What does this mean for daily use?
Is writing the aperture values to EXIF only possible for lenses without 6-Bit code?
No, it is also possible with 6-bit coded lenses.
It helps you to keep track of what apertures you used, if you care.
"You can use the aperture wheel on the camera to change the aperture value which will be written in the exif data. So if you want to track at which aperture values you shot this is a handy feature."
This is really cool as well.
So, the only difference when using 6-bit coded lenses is that the FL is added to EXIF automatically whereas with non-6-bit one must use the adapter's FL wheel to set it manually. Aperture is always manual, regardless if the lens is 6-bit coded or not.
p.1 #17 · TTartisan Leica M to Sony E adapter with 6-bit code
Fred Miranda wrote:
"You can use the aperture wheel on the camera to change the aperture value which will be written in the exif data. So if you want to track at which aperture values you shot this is a handy feature."
This is really cool as well.
So, the only difference when using 6-bit coded lenses is that the FL is added to EXIF automatically whereas with non-6-bit one must use the adapter's FL wheel to set it manually. Aperture is always manual, regardless if the lens is 6-bit coded or not.
The other difference is the maximum aperture the lens is registered as.
For non 6-bit coded lenses it is always f/1.0 whereas it is the correct maximum aperture value for the coded ones.
Price will be $72 when it is live tomorrow, which I consider to be quite reasonable.
p.1 #19 · TTartisan Leica M to Sony E adapter with 6-bit code
BastianK wrote:
The other difference is the maximum aperture the lens is registered as.
For non 6-bit coded lenses it is always f/1.0 whereas it is the correct maximum aperture value for the coded ones.
Price will be $72 when it is live tomorrow, which I consider to be quite reasonable.
I have been waiting for this so I will grab one tomorrow. Thanks for the heads-up.
p.1 #20 · TTartisan Leica M to Sony E adapter with 6-bit code
To those that ordered one and will hopefully receive it soon it would be great if you could share your experiences with camera and lens compatibilties,
especially when it comes to the M-mount lenses with big entrance pupil (e.g. 90mm 1.25) and more 6-bit codes.
