Although it was know for a long time that the Red Dot Artars were fabulous lenses at infinity (the reason that they were produced as taking lenses in shutter), the process markets that the longer lenses were relegated to kept their design conditions consistent with the static cameras they were used on. That is not to say that this condition was not terminal for shutter mounting these lenses. I have a 42" Red Dot that Steve Grimes mounted in a #5 Ilex that while it sacrificed a bit of its design illumination in the mount process it works like a champ. Ditto for the Packard. I have a 35" Red Dot with a front mounted Packard that does its job admirably. I also found a 30" Doctor lens that was mounted from the factory in a Copal #3 like the new Schneider ULF lenses.
I agree with the assessment that producing a larger modern shutter for this application is highly unlikely to come to fruition. Why? Not enough volume as a function of time. I know that it is not what you want to hear but a new offering from the ground up simply will not meet the economic criteria necessary to get it even on the drafting table let alone produced.
All is not lost however. Folks have been relying on the #5 Ilex and the Packard for years and they simply work. If that does not work, there is always f128 and a double dark felt stovepipe hat.
Cheers!
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