CV 15mm adapter for M8 images

[usm]

Hi!
Which one of the following adapters is the best one to use with CV 15mm and for coding on a M8?
Thanx!
Mario

 

[rxmd]

Whichever is cheapest. Otherwise no difference.

 

[ywenz]

There is a difference. I used an old adapter ring for my CV15 and the lens would not mount at the correct position. Meaning the lens had about another 1/5 of the circumference of turn left before the DOF scale is centered at the 12 o' clock position on the barrel. It didn't seem to affect the image however, but it was awkward to look at. I've sinced acquired another adapter and now the lens aligns exactly! I've also read about badly made adapters that are too thick and thus the lens would never focus properly..

odd looking lens:

This is bad adapter..

 

[Sailor Ted]

An experiment is worth a thousand hours of conjecture.

 

[Ben Z]

I'd have to say the 3rd one. It's the original type that has a wide flange in the area where the coding dots need to be, the others are cut back too far to self-code. Also being a 90mm adaptor the frameline cam is the longest of the three possibilities and can be filed down if necessary to bring up the correct framelines, which is also an input parameter along with the dots, for the firmware's processing algorithms. I suspect the older 9cm adaptor will become the "universal" choice for self-coders of screwmount lenses and until an aftermarket is made, I bet the prices skyrocket on them.

 

[kbg32]

I've never had a screwmount lens line up perfectly at 12:00 with an adapter. It doesn't effect focus or usage of the lens in my experience.

 

[Andy Aitken]

If you want to code it you must have an adaptor without a cutout - which is hard to come by AND it must bring up the right frameline for the coding to be recognised (although manually moving the frameline selector will also work). Hopefully someone might have the saavy to start making adapters suited for coding (little hollows for the "bits" would be ideal) but right now there are very few options apart from the older Leitz brand adaptors which are pretty thin on the ground.

 

[Andy Aitken]

Sorry, didn't answer the question: In other words the 3rd one but the filed down to match the frameline used by the Leica lens that you're trying to "fake".

PS If anyone has an adapter as shown in the 3rd picture they want to sell or trade please PM me.