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Old 24-09-2012, 07:18 PM
clive milne
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clive milne is offline
 
Join Date: May 2011
Location: Freo WA
Posts: 1,443
Quote:
Originally Posted by skysurfer View Post

Can the manufacturers not 'downscale' the large and long FL eyepieces like the Ethos 21 'downscale' (resizing all elements) retaining its design ?
E.g. make a '1:2 'scale model' of a 21mm Ethos which means a 10mm 'mini Ethos' with 100º FOV and fits well in a 1.25" (32mm) barrel (and even in an old 24.5mm) and weighs only 1/(2^3)*900 = 110-120 grams ?

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No, it would not be practicable to simply scale a 21mm ethos down to 10mm because you would end up with 7mm of eye relief.

The 15mm of eye relief on the 21mm is stretching the friendship as it is.
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