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Old 29-08-2013, 03:56 PM
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Shiraz (Ray)
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Shiraz is offline
Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,791
Originally Posted by Lee View Post
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.
I have just started calibrating mine, but do not think it varies quite that much. I currently need to refocus at about 2C change in temp, but of course that will vary with seeing. will PM when I have more data. regards ray
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