Hi 42za,
The 2017 catalogue did state that Uppendahl prisms were to be used
And it it would be reasonable to suppose that this is still the case - but until it’s confirmed we just don’t know
Uppendahl prisms are used in the still produced 2nd generation Geovid rangefinders. So it's not as if lack of current expertise should be a consideration
However, Schmidt-Pechan prisms are more compact, so theoretically they could fit into the existing space
- see the image from Jan van Daalen comparing an S-P pair from a Leica BN to the Uppendahl group from an original Leitz v2 Trinovid
(from:
https://www.birdforum.net/showpost.php?p=3670563&postcount=95 )
As a practical consideration, the choice of prisms shouldn’t matter (what works works)
However in considering the likely market, one would think that authenticity/ nostalgia/ rarity would be important considerations
- - - -
Hi Canip,
Good pick up! I only looked at the FOV in meters, so I didn’t notice the discrepancy in the 2019 table
- and I presume that the figures in meters are the correct ones, since Leica’s original measurements would be metric
As we know, FOV conversion is an angular conversion i.e. meters at 1000 meters verses feet at 1000 yards,
so the conversion factor is x 3 (or ÷ 3 for feet to meters), since there are 3 feet in a yard
However, the conversion factor used is x 3.28. That is, what should be used to convert a linear measurement - and is used for the minimum focusing distances
- so it’s a failure in proof reeding (. . . a little joke, I couldn't resist!)
John