Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  21 CVn  ·  24 CVn  ·  85 UMa)  ·  85 eta UMa  ·  Alkaid  ·  Benetnasch (η UMa  ·  HD114877  ·  HD114904  ·  HD114957  ·  HD115020  ·  HD115460  ·  HD115627  ·  HD115638  ·  HD115706  ·  HD115751  ·  HD115809  ·  HD115883  ·  HD115898  ·  HD115953  ·  HD115993  ·  HD116044  ·  HD116056  ·  HD116127  ·  HD116172  ·  HD116303  ·  HD116377  ·  HD116405  ·  HD116475  ·  HD116493  ·  HD116531  ·  And 69 more.
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M51 Optics Test 135mm, Rob7980
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M51 Optics Test 135mm

Getting plate-solving status, please wait...
M51 Optics Test 135mm, Rob7980
Powered byPixInsight

M51 Optics Test 135mm

Equipment

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Acquisition details

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Description

Efforts to improve the optical performance of the Samyang 135mm f/2 lens. Added 0.75mm spacing to back-focus and tested at f/2.8... Next steps are to adjust tilt and test spacing at f/2.

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M51 Optics Test 135mm, Rob7980