Alpa HPF Ring on Cambo 72mm lens

[sc_john]

Has anyone been able to fit an Alpa HPF ring on Cambo Schneider APO_Digitar 72/5.6 L?

Thanks,

John

 

[jlm]

sort of...rodie 70, T/S,

 

[stephengilbert]

"Sort of," meaning John milled the ring to get clearance?

 

[jlm]

yes, also modified the knobs for clearance, and it is a rodie, not a schneider, and is is T/S

 

[trailshooter]

So is the pitch of focus adjustment on the Rodie Cambo mount the same as the Alpa version? I.e. does the Alpa focus scale correlate properly?

 

[sc_john]

Having one of John's iPhone holders for my Cambo and experiencing his quality of work, I am sure the HPF ring fits the Rodie perfectly and works very well. However, I am questioning fit on Cambo Schneider 72L without modification. Thanks.

 

[jlm]

I'm pretty sure the helicoid devices are mfg'd by the lens maker and not tweaked further by Alpa or Cambo. What Alpa seems to have done is mark out even degree spacings on all their rings and then engrave the calibrated distance at that degree of rotation. I went to the trouble of plotting out a degree vs distance graph just for kicks, for the 43Sk and the Rodie 72, and this is where Alpa has made a major contribution.

Of course, had Sk and Rodie simply added more points of reference to the original engraving...

 

[sc_john]

John,

Thanks for the info. The specific reason I am asking about Cambo Schneider 72L is that Alpa lists on their web site that the HPF ring fits the Alpa Schneider 72N. Dealer asked Alpa if ring would fit on 72L, and Alpa said no. I wouldn't think the L has a different diameter or length, but there could be a difference in the way the lens is mounted on the Cambo board vs Alpa board. Anyway, I wanted to see if anyone had tried it. The rings are a bit expensive to just buy and try.

Once again, the iPhone holder is terrific. Great job!!!

John

 

[PeterL]

I think this must be a typo on the Alpa page. Schneider only makes the Apo-Digitar 72/5.6 L - there is no such lens as a Apo-Digitar 72N as far as I know. And it is not listed on the Schneider site.

Cheers, -Peter

 

[jotloob]

I have a Super Angulon XL 5,6/72mm in ALPA Mount and also have a HPF Ring mounted . It is a LF lens and I used it already with my ARCA 4x5 . That ALPA combo works perfectly fine with my CFV-39 .