Fotoman: one lens cone for different 75mm

[cyron123]

Hi guys,
Fotoman 617: Is it possible to use a 75mm cone for different lenses like Fuji 75mm or nikkor 75mm or rodenstock 75mm.

If yes I could change between lenses.

[Oren Grad]

It depends. The flange-to-film specification (i.e., how far the lens needs to be mounted from the film to attain infinity focus) varies for different 75mm lenses. If the cone is shorter than the specification for a given lens, it might require a shim for proper calibration. If the cone is too long, it would have to be shaved down to allow infinity focus.

[cyron123]

Hi Oren,
Thank you. Do you know this for a Schneider angulon 75mm and a Rodenstock grandagon n 75mm?

[gregmo]

Typically the cone is adjusted in the "factory" prior to shipment based on the specific lens intended to be used. Each lens may have slightly dif specs which are accounted for in the cone adjustment.
With that said, the cones offer a small amount of leeway to get them adjusted for proper focuse at infinity.
Once you get a lens set on a cone, you generally don't want to be removing them on a regular basis. Too much hassle.

Contact Fotoman & ask them if the other lenses will also work.

I have a couple duplicate focal lengths, some lenses set on the cones as well as the same focal lengths on lens boards for my view cameras.

[Oren Grad]

Hi Oren,
Thank you. Do you know this for a Schneider angulon 75mm and a Rodenstock grandagon n 75mm?

Late-model 75/5.6 Super Angulons have a FFD spec of 84.8mm, the 75/6.8 Grandagon-N is 79mm and the 75/4.5 Grandagon-N is 82mm.

[cyron123]

Hmm. This sounds too much. Between the 3 lenses

[cyron123]

HI Guys,
were could i see if there is es late or an early model of my Super Angulon 75 5.6? The Serial No is 12 xxx xxx. Thank you.
I have read that the early model has a flange to film distance of 82.4mm. Is this right..?!?!
Thank you

[Oren Grad]

were could i see if there is es late or an early model of my Super Angulon 75 5.6? The Serial No is 12 xxx xxx.

http://www.schneideroptics.com/info/age_of_lenses/

I have read that the early model has a flange to film distance of 82.4mm. Is this right..?!?!

Yes:

https://www.schneideroptics.com/info.../5.6-75mm.html

[cyron123]

HI Oren,
But what is my lens with Serial No 12 xxx xxx? Is is from 1973. A late model? The timeline start at 1919.. Puhh. :-)

[Oren Grad]

HI Oren,
But what is my lens with Serial No 12 xxx xxx? Is is from 1973. A late model?

I doubt it. What kind of shutter is it in? Is it multicoated? Notice that the 84.8 mm spec on the linked Schneider vintage lens data page is for the MC version.