Quote:
Originally Posted by Constant
Gentlemen, many thanks I believe I have a new kernel of knowledge! I have been puzzled by the older Unitron's and their design. The explainations delivered here describe the effect of limiting technology and not just a desire for long and bulky high f/number scopes making sense of the Unitron style refractors.
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Availability of suitable glass types for short ratio refractors at an affordable price would probably have been the major contributor.