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Welcome to the
Open PHD Guiding
(PHD2) forum, telescope guiding software for astro-photographers.
To get help with PHD2, please upload your log files - here's how:
How to ask for help with PHD2
.
If you are new to PHD2, we urge you to read the
documentation
and
follow these tips:
Use the forum search tools - most questions have been answered many times
Read and follow the
Best Practices Guide
Use the New-Profile-Wizard to define and manage your equipment configurations
Avoid making changes to guiding parameters without knowing exactly what they do
After you get a good calibration run and a Guiding Assistant Run, per the Best Practices, run the
Baseline Assessment
Forum guidelines for vendors
.
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Alex Yas
, …
Bryan
4
Jan 7
Binning problems with Player One cameras
Why would you use New rather than New Using the Wizard, when the Player One cameras are not even
unread,
Binning problems with Player One cameras
Why would you use New rather than New Using the Wizard, when the Player One cameras are not even
Jan 7
Lance Smith
, …
George Shoup
8
Jan 6
Help with guiding on a iOptron CEM120
Here are my latest logs https://openphdguiding.org/logs/dl/PHD2_logs_EMah.zip Log section 1-6 I was
unread,
Help with guiding on a iOptron CEM120
Here are my latest logs https://openphdguiding.org/logs/dl/PHD2_logs_EMah.zip Log section 1-6 I was
Jan 6
Eric Mong
, …
Brian Valente
5
Jan 6
Calibration issue
Thanks Brian, Some picture of my setup from different angles : Le mardi 6 janvier 2026 à 15:06:35 UTC
unread,
Calibration issue
Thanks Brian, Some picture of my setup from different angles : Le mardi 6 janvier 2026 à 15:06:35 UTC
Jan 6
pauls...@gmail.com
, …
Bruce Waddington
9
Jan 6
connection issue
It sounds like you're probably on the right path to getting this resolved. If you do, it would be
unread,
connection issue
It sounds like you're probably on the right path to getting this resolved. If you do, it would be
Jan 6
Ali
, …
sarg314
7
Jan 5
AM5 new firmwear 1.8.6, could be the reason?
I was wrong about FW 1.8.6 being suspected , Its not affected the guiding. I test the mount again and
unread,
AM5 new firmwear 1.8.6, could be the reason?
I was wrong about FW 1.8.6 being suspected , Its not affected the guiding. I test the mount again and
Jan 5
Tim Stevenson
,
Brian Valente
2
Jan 5
Guidescope Suitability
Hi Tim, In general you have the right idea regarding the relative image scale of guiding-to-imaging.
unread,
Guidescope Suitability
Hi Tim, In general you have the right idea regarding the relative image scale of guiding-to-imaging.
Jan 5
Matt Zerbe
,
Bruce Waddington
3
Jan 3
Help with HEQ5 guiding results
Thanks Bruce, this is very helpful. Upon examination, the motor gears were tight so I readjusted them
unread,
Help with HEQ5 guiding results
Thanks Bruce, this is very helpful. Upon examination, the motor gears were tight so I readjusted them
Jan 3
Cosimo
, …
Brian Valente
3
Jan 3
CGX
Hi Cosimo Use the New Profile Wizard and enter accurate information about your setup. The step size
unread,
CGX
Hi Cosimo Use the New Profile Wizard and enter accurate information about your setup. The step size
Jan 3
John Sayers
,
Brian Valente
6
12/27/25
RA spikes at worm gear period
PS >>>The period of the worm is 483.45. I have the PPEC set to Predictive Weight 62 and
unread,
RA spikes at worm gear period
PS >>>The period of the worm is 483.45. I have the PPEC set to Predictive Weight 62 and
12/27/25
Kathleen Keightley
,
Bruce Waddington
2
12/27/25
Losmandy Mount Interface
It sounds like you haven't installed both the ASCOM platform and the Losmandy ASCOM driver. The
unread,
Losmandy Mount Interface
It sounds like you haven't installed both the ASCOM platform and the Losmandy ASCOM driver. The
12/27/25
Tim Stevenson
, …
Brian Valente
7
12/27/25
AM5 Mount Best Practices
Hi Tim your segment 7 run on 12/25 may offer some insight that your guiding issues seem to be
unread,
AM5 Mount Best Practices
Hi Tim your segment 7 run on 12/25 may offer some insight that your guiding issues seem to be
12/27/25
Kevin Quin
, …
Bruce Waddington
31
12/26/25
Communication problem between PHD2 and Nitecrawler rotator?
Sure, no problem, my e-mail address is in the private e-mail. Bruce On Friday, December 26, 2025 at 7
unread,
Communication problem between PHD2 and Nitecrawler rotator?
Sure, no problem, my e-mail address is in the private e-mail. Bruce On Friday, December 26, 2025 at 7
12/26/25
Richard Benoit
,
Brian Valente
5
12/24/25
NINA Advanced Sequencer and PHD2 Guiding Assistant
Brian - I understand, and PHD2 is set up for encoder mounts per the AP video. Until I moved to HCRO I
unread,
NINA Advanced Sequencer and PHD2 Guiding Assistant
Brian - I understand, and PHD2 is set up for encoder mounts per the AP video. Until I moved to HCRO I
12/24/25
Stéphane Chabert
,
Bruce Waddington
5
12/23/25
Problem for connected camera
Thanks for your help. I will try next time De : open-phd...@googlegroups.com <open-phd-
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Problem for connected camera
Thanks for your help. I will try next time De : open-phd...@googlegroups.com <open-phd-
12/23/25
Ettore Guido “Astrofilo66” Basiglio Ribaudo
,
Magnus Larsson
4
12/22/25
Worm cge pro
Hi Ettore, Great, thanks! Would it be OK for you to put me in contact with your friend Davide Del
unread,
Worm cge pro
Hi Ettore, Great, thanks! Would it be OK for you to put me in contact with your friend Davide Del
12/22/25
Paul Wilson
, …
Ralph Kimball
6
12/22/25
Mount advice?
Yes I figured that out last night. I am not new to PhD but I am new to having to really get into it
unread,
Mount advice?
Yes I figured that out last night. I am not new to PhD but I am new to having to really get into it
12/22/25
astro...@gmail.com
,
Brian Valente
4
12/18/25
dark library does not match error
camera binning will do that as well. good find On Wed, Dec 17, 2025 at 6:22 PM astro...@gmail.com
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dark library does not match error
camera binning will do that as well. good find On Wed, Dec 17, 2025 at 6:22 PM astro...@gmail.com
12/18/25
Sybrand Strauss
, …
Andy Galasso
4
12/16/25
Unknown image format
Hi Jon, Sorry to hear you had trouble with INDIGO after updating to 2.6.14. Unfortunately this is not
unread,
Unknown image format
Hi Jon, Sorry to hear you had trouble with INDIGO after updating to 2.6.14. Unfortunately this is not
12/16/25
Ed M
, …
Bryan
5
12/16/25
Reports "No star found" when star is clearly visible
Matt Your reply is on a different thread. Bryan On Tuesday, December 16, 2025 at 9:22:15 AM UTC-7
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Reports "No star found" when star is clearly visible
Matt Your reply is on a different thread. Bryan On Tuesday, December 16, 2025 at 9:22:15 AM UTC-7
12/16/25
Matt Brown
, …
Brian Valente
11
12/16/25
Guiding Issue
>>> Bruce pointed out that I did not perform a re-cal when changing the angle from the value
unread,
Guiding Issue
>>> Bruce pointed out that I did not perform a re-cal when changing the angle from the value
12/16/25
Paul Wilson
,
Brian Valente
6
12/10/25
Lost calibration again?
Ok. Well I did only 180sec subs last night so I thought I might have flagged the wrong ones. Paul S.
unread,
Lost calibration again?
Ok. Well I did only 180sec subs last night so I thought I might have flagged the wrong ones. Paul S.
12/10/25
Kevin Wisdom
, …
Brian Valente
16
12/8/25
Massive guiding excursions with new mount
Kevin in general things look okay I don't think that's an accurate assessment of '
unread,
Massive guiding excursions with new mount
Kevin in general things look okay I don't think that's an accurate assessment of '
12/8/25
Glen
, …
Bruce Waddington
6
12/7/25
PHD2 Only seeing static after pressing loop.
Hi Glen. When you joined the group, I sent you some initial advice on isolating camera connection
unread,
PHD2 Only seeing static after pressing loop.
Hi Glen. When you joined the group, I sent you some initial advice on isolating camera connection
12/7/25
niteman1946
, …
Brian Valente
4
12/5/25
Checking Sidereal Tracking Mount Accuracy
Thanks Bruce and Bryan for the responses. I'll dig into your recommendations. Mark On Friday,
unread,
Checking Sidereal Tracking Mount Accuracy
Thanks Bruce and Bryan for the responses. I'll dig into your recommendations. Mark On Friday,
12/5/25
Alan Moore
, …
Bruce Waddington
6
12/4/25
Problems with a new mount
Yes, I was frustrated by that until I found the small "settings" icon right beside the
unread,
Problems with a new mount
Yes, I was frustrated by that until I found the small "settings" icon right beside the
12/4/25
Ed M
,
Bruce Waddington
4
12/1/25
Dark library keeps disappearing
Just to avoid a lot of wasted time and frustration - you need to use the built-in 'Upload Logs
unread,
Dark library keeps disappearing
Just to avoid a lot of wasted time and frustration - you need to use the built-in 'Upload Logs
12/1/25
Mark McComiskey
,
Bruce Waddington
2
11/30/25
Recent Version
It's just a minor efficiency optimization. For non-encoder mounts, the CA works pretty hard to be
unread,
Recent Version
It's just a minor efficiency optimization. For non-encoder mounts, the CA works pretty hard to be
11/30/25
macd...@yahoo.com
,
bw_m...@earthlink.net
3
11/29/25
Copying profiles and dark libraries
Thank you, Bruce, I just saw the Import/ Export functions this morning. On Friday, November 28, 2025
unread,
Copying profiles and dark libraries
Thank you, Bruce, I just saw the Import/ Export functions this morning. On Friday, November 28, 2025
11/29/25
Richard Scott
, …
Dale Ghent
10
11/29/25
Guiding on a Geostationary Satellite
An encoder mount with RA and Declination tracking rates set to values derived by the satellite's
unread,
Guiding on a Geostationary Satellite
An encoder mount with RA and Declination tracking rates set to values derived by the satellite's
11/29/25
Alois Regl
, …
Michael Waring
3
11/27/25
Svbony 205 not recognized in phd2
I believe this is a video-only camera, it doesn't deliver single frames required for guiding
unread,
Svbony 205 not recognized in phd2
I believe this is a video-only camera, it doesn't deliver single frames required for guiding
11/27/25