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Old 29-08-2013, 03:40 PM
Lee's Avatar
Colour is over-rated

Lee is offline
Join Date: Sep 2005
Location: Newcastle, Australia
Posts: 2,414
Ray - how do you find your focus holds/shifts with changing temp? My f/4 newt seems to shift by around 10 steps (40um) per 0.5-1 deg C at times.
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