Shortest suitable refractors AFAIK are a 50mm f/6.6 and 81mm f/4.4 from TeleskopService.
Shorter than those means a camera lens and for m4/3 there are two:
- Olympus m4/3 300mm f/2.8, at almost $9k.
- Panasonic 200mm f2.8 at $4k.
Last edited by Wavytone; 21-03-2018 at 01:38 PM.
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