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I have a few questions...
GetOutOfJailFreeCard
With an Alt/Az mount exposure times are critical, and in my experience would suggest keeping them below 10 Seconds. I trust we are not talking about Alt/Az mounts in this thread.
1. PEC is important for non-guided photo sessions. Guiding, if effective, takes over from that. Where is the cut-over? 10 seconds, 30 seconds, 180 seconds,300 seconds, more?
2. Where does the quality of the mount come into play, (how can Takahashi, AP and other high-priced mounts justify the expense?) and where does electronic feedback take over?
3. Surely, well machined mounts have minimal (or at least predictable, and therefore correctable PEC), and if properly aligned, there should be little need for guiding.... or is there?
4. In a permanent, perfectly polar-aligned world, is not the only issue PEC, or tracking rate? (I acknowledge that portable , and less-permanent (aligned)installations introduce DEC issues, and guiding may then be of benefit)
[In all of this, I also recognise the diffraction issues about near-horizon tracking. I am focussing on things more near our current Zenith as it progresses]
P'ing into the wind for me, since I have recently committed to one of the better mount systems. I'm hoping the native tracking results justify the ecpense.
As Murphy insists, I'm not getting a chance to play with my new toy for at least several weeks now.
Retirement is looking better by the day!
Interested in comments...
vbr
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