tenex
reality-based
As I discovered not long ago with an 8x30 Dialyt, there were several model variations (with different locations of the diopter knob and slightly varying FOV) and the later phase-coated prisms cannot be retrofitted to the older designs. On the other hand, if you were lucky enough to have one of the last model before phase coatings, Zeiss might be able to do this, for a fee. It could be worth looking into.If only Zeiss would do (or had done) with the non-P Dialyts as Swarovski used to do with their SLCs and upgrade these - even for an extra cost - with phase-coated prisms (ideally dielectric coated for that extra little amount of brightness), it wouldn't be a surprise if many more of these would still be in regular use today.
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