Re: Multi star guiding with PHD2 #EXOS2 #astrophotography #CloudyNights

Dave Cherry

Apologies Walter

Must have had one too many scotches!

Wong guy, wrong thread


Still.... what you say ,, I concur 😊



Me bad


Dave C




Sent from Mail for Windows 10


From: Walter Vinci
Sent: 30 March 2021 21:58
Subject: [ESPMC-Eight] Multi star guiding with PHD2 #EXOS2 #astrophotography #CloudyNights


Hi All,

You might be already aware of this, but latest PHD2 build enables multi star guiding. There is a long thread on cloudy nights
I just wanted to mention it here since I believe it is especially relevant for weight-capable but entry level mounts like the exos2. my experience so far with my exos2 is that it needs to be guided aggressively. I typically have best rms with guiding exposures of 1s, despite picking up a lot of seeing fluctuations. Multi star guiding should allow for a more accurate guiding with very short exposures by averaging out a lot of seeing (three times  smaller rms due to seeing with nine guiding stars). Hopefully this new functionality allows to push further the limits of the exos2 for astrophotography.

I will try it this week. Let me know how it works for you,



Walter Vinci

Starfield 0.8 Field Flattener/Reducer.
ZWO ASI290mm-mini & Orion 50mm Guide Scope
Canon EOS Rebel SL1
SharpCap, APT, PHD2, SiriL, Stellarium


Scopes: Sky Watcher 200PDS, Skywatcher 72ED
Mount: Explore Scientific PMC8 EXO2
Cameras: ASI 294MCPRO Coooled, Altair guide cam + 50mm scope
Software: Sharpcap Pro ,PH2, Stelarium Startools

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