Leica R 60mm 2.8 Macro Adapter Compatibility Questions

[TL3]

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Hi everyone, I shoot with a Leicaflex SL2 and an R to L adapter on my CL.  Managed to scoop up what appears to be a 3-cam 1979 SN Leica R 60 mm 2.8, and it also came with 2 macro adapters which appear to be 14198 and 14256.

The camera shop staff didn't really do the best job of explaining the difference between the adapter; they actually had both adapters connected together.  My question are which adapter(s) can be used with the Leicaflex SL2, and which can be used with the R to L adapter which has ROM contacts?  Which adapter is optimal for each camera?  And is there any point to combine with adapters?

[a.noctilux]

Two generations of adapter for the same 60mm lens.

14198 can be used mounted on the 60mm on your Leicaflex SL2.

Before mounting you need to set the lens&adapter aperture to minimum (22)

...

14256 is the same but intended to be used on more recent Leica R (R4/5/6/R-E).

I don't know if either is suitable for use with ROM lenses.

I'd try the 14256 on R to L adapter.

Maybe the 60mm you have is not ROM type, so ROM R to L adapter can not be used full  feature.

[TL3]

Yes my 60 mm is not ROM, I believe 3 cam.  So no risk of damaging the R to L ROM contacts with the 14256?