Quote:
Originally Posted by dvj
IMO, the bigger failure of the FSQ system and resolution is the focal length change with temperature. This has become such an annoyance, I've dropped my 40 minute subs to 30 minutes.
j
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I have found that giving a really good cool down works well. I generally automate to refocus after each sub frame, but the long cool down is really necessary to manage the focus shift for the first two hours.