What happens wiyh the 50-75 adapter to M-mount.?

[fernandez_diez]

I,ve bought a adapter 50-75 to my Zeiss ZM, to mount a VC 50mm skopar. When I mount this lens, with this adapter, the framelines appear 35 mm, not 50mm, therefore I have to fit this adapter in a 35 mm lens.
Why does it happens? Is it a camera problem, an adapter problem?
I have another adapter 28-85, and with it, the framelines show 28-85.
I must say that the adapter is written M 39, 50-70.
Regards.

 

[pvdhaar]

There is a possibility that the adapter was modified (i.e. by filing down some metal at the back) to bring up the 35/135 frames. It's something that can't be reversed unfortunately.

 

[oscroft]

Is this on a Voigtlander Bessa? The adapter doesn't automatically select the frame on a Bessa - you have to use the lever on the top.

 

[fernandez_diez]

tO OSCROFT:
my canmera is a Zeiss Ikon ZM. It selects automatically the frame.
Perhaphs the adapter was wrong writing 50-75 on it.

 

[Gary B]

I am not sure, but I don't think that the adapters made for Leica bodies match up with the with the ZM body in the same way. 25-35-135, 50-75, and 28-90. Someone out there with both systems should be able to confirm this.

 

[ath]

There are cheap adapters out there, which will not bring up the proper brightlines.

 

[payasam]

Adapter either wrongly made or else modified.

 

[oscroft]

my canmera is a Zeiss Ikon ZM.

Ah, sorry - as you had posted on the Voigtlander Bessa forum, I'd assumed you were talking about a Bessa

 

[fernandez_diez]

Ah, sorry - as you had posted on the Voigtlander Bessa forum, I'd assumed you were talking about a Bessa

I posted here because the lens are VC

 

[fernandez_diez]

Now I, m lost. I bought two 50-75 adapters to my Zeis Ikon ZM to both differents sellers on e bay.
Curiously both adapters do the same effect, the 35mm frameline appears, not 50mm frameline.
I,m affraid tho buy other adapter.

Is there any difference among the items for sale in e-bay, for example, talking about the same item, a 50-75 mm adapter because I see very clear differences in price.? From 10$ to 40 or 50$ in a similar item .