Originally Posted by
Marco Annaratone
Take a Compound-mounted 300/4.5 Heliar (i.e., a V): can I replace the front cell and the rear cell with those of a 300/4.5 Apo-Lanthar by just unscrewing the Heliar's and screwing in the Lanthar's (Assuming - which isn't a given, at least to me - that they have the same thread.)
I have seen both Apo-Lanthar and Heliar 300/4.5 mounted on Compound V and the distances between front cell and shutter and between shutter and rear cell *seem* to be very similar.
Just curious.
Thanks!!!
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