Thread: Modifying a GSO 200f4 for high res imaging
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Old 29-08-2013, 04:40 PM
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Lee
Colour is over-rated

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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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