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Markarian's Chain
Markarian's Chain by plotek78
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Chris Sullivan
What scope and coma corrector are you using?
Fast Newtonians ReflectorsDeep Sky
May 28, 2017Chris Sullivan
Last post: David Pitou
David Pitou
Phil Creed
Jordan Morley
Dan_I
Stephen Jones
722.4k
4 hours ago
Wandrille VINCENT
adapter for Samyang 135mm F2.0 lens
EquipmentBeginnerBuying Advice +1
Dec 20, 2025Wandrille VINCENT
Last post: Abhishek Prasad
Abhishek Prasad
odelay
Eric Benedetti
andrea tasselli
Clayton Ostler
38680
8 hours ago
hisan koko
Where to buy affordable telescope tracking mounts
EquipmentStar TrackerPortable Setup +2
May 2, 2026hisan kokoNew contributor
Last post: hisan koko
Eric Gagné
bigCatAstro
Rainer Ehlert
Frédéric Ruciak
TiffsAndAstro
18321
2 hours ago
Hassaan Zaheer
Cannot figure out these weird gradients
Sky-Watcher Quattro 150P
May 7, 2026Hassaan Zaheer
Last post: Klaus Haaken
Klaus Haaken
Willem Jan Drijfhout
churmey
Tony Gondola
Brian Puhl
19240
1 hour ago
rqfugate
Serious Stray Light Issue - William Optics UltraCat 56
William Optics Ultra-Cat 56Artifacts
Mar 1, 2026rqfugate
Last post: rqfugate
Jeff Reitzel
DavesView
Bob ten Berge
Michael Rushalko
Dave
341k
22 hours ago
Craig Bernier
New Charles Bracken Book Weighs in at Six Pounds!
BeginnerIntermediateAstronomy tools +2
Apr 23, 2026Craig Bernier
Last post: Patrick
Patrick
Isbel Gonzalez
Javier Temprano
Alan M
John Hayes
35935
1 day ago
Greg
Trying to decide on a larger refractor for imaging galaxies.
EquipmentBuying Advice
May 2, 2026GregNew contributor
Last post: Alex Nicholas
Alex Nicholas
Tony Gondola
Stelios_Stergiou
Willem Jan Drijfhout
Dark Matters Astrophotography
23641
20 hours ago
Mike Mulcahy
Reflections from a CDK 12.5
EquipmentFiltersReflectors +3
Apr 30, 2026Mike Mulcahy
Last post: John Hayes
John Hayes
Alejandro Moreschi
Willem Jan Drijfhout
Marcin Cikała
Stellar Nomads
8252
5 hours ago
Craig Towell
Anyone for data sharing?
Collaboration
May 4, 2026Craig Towell
Last post: Craig Towell
Doug Crowe
Spacetime Pictures
Steven Scott
Brian Puhl
Astro Sarisky
13355
1 day ago
Diego Pacchiani
Sky-Watcher 200 PDS with HEQ5
Sky-Watcher Explorer 200PDSSky-Watcher HEQ5 PROBeginner +1
Jul 16, 2024Diego Pacchiani
Last post: Volodymyr Kravchenko
Volodymyr Kravchenko
Wim van Berlo
FilippoTib
Arny
Stefano Annarumi
11528
1 day ago
Philip Mortimer
Upgrading from Vaonis Vespera to modular ZWO setup for planetary and deep sky
Vaonis Vespera Integrated CameraVaonis VesperaEquipment +2
May 5, 2026Philip MortimerNew contributor
Last post: Andrew Lamond
Andrew Lamond
Tony Gondola
Cassio Pieroni Trevisani
875
13 hours ago
Dark Matters Astrophotography
Retrospective on HCRO in New Mexico
ObservatoryRemote AstrophotographyWeather
May 6, 2026Dark Matters Astrophotography
Last post: Jeffery Richards
Jeffery Richards
Arun H
Bob Lockwood
Tony Gondola
5247
1 day ago
Menelaos
ZWO CAA backfocus issue with Sky-Watcher Newtonian setup
EquipmentReflectorsHelp Needed
May 6, 2026Menelaos
Last post: Seung-Jun Kim
Seung-Jun Kim
Alex Nicholas
Tony Gondola
543
5 hours ago
Willem Jan Drijfhout
Moving from one Remote Hosting Site to Another
EquipmentObservatoryRemote Astrophotography +1
May 7, 2026Willem Jan DrijfhoutPerfect post
041
2 hours ago
NAG
QHY268m USB compatibility issues
QHYCCD QHY268 MEquipment
May 4, 2026NAG
Last post: HR_Maurer
HR_Maurer
Tony Gondola
Rob Johnson
Brian Puhl
462
6 hours ago
Andy williams
Portable telescope setup advice for northern hemisphere imaging from Vietnam
EquipmentRefractorsBuying Advice
May 3, 2026Andy williams
Last post: Andy williams
andrea tasselli
270
11 hours ago
Kevin Lucas
What causes double stars in telescope images?
EquipmentRefractorsArtifacts +1
May 4, 2026Kevin LucasNew contributor
Last post: Jerry Gerber
Jerry Gerber
bigCatAstro
Tony Gondola
Willem Jan Drijfhout
churmey
9232
1 day ago
Interactive Sky
Darker or brighter background: which looks better?
Background ExtractionProcessingRequest for feedback
Apr 30, 2026Interactive Sky
Last post: Tony Gondola
Tony Gondola
Bill McLaughlin
Franco Grimoldi
Anthony (Tony) Johnson
Astro Hopper
20750
3 days ago
Jeff Bennett
QHY Polemaster adapter compatibility with Astro-Physics Mach1 GTO
Astro-Physics Mach1 GTO
Apr 24, 2026Jeff Bennett
Last post: Jeff Bennett
Jeffrey Kieft
ItsMeAstro
Marcelof
Bob Lockwood
Tom Bash
996
2 days ago
Michael Jarvis
Pixinsight Repository download error
ProcessingAstronomy toolsHelp Needed +1
May 5, 2026Michael Jarvis
Last post: Marcelof
Marcelof
171
1 day ago
Eric Gagné
Changes to PixInsight forum ????
Pleiades Astrophoto PixInsight
Apr 25, 2026Eric GagnéFrequent contributor
Last post: Rainer Ehlert
Rainer Ehlert
Craig Towell
Jeffrey Kieft
Chuck Schreiner
Rodolphe Goldsztejn
581.8k
5 days ago
Olivier G
QHY Minicam8 blue halo
QHYCCD miniCAM8M
Feb 20, 2026Olivier G
Last post: Olivier G
TiffsAndAstro
Willem Jan Drijfhout
Michael Brennan
Alex Nicholas
ZigZagZebraz
17287
3 days ago
John Hayes
How many of you own more than one telescope?
Equipment
Oct 8, 2024John HayesExemplary contributor
Last post: Pete Bouras
Pete Bouras
Jonathan Tatum
Valentine Treshchun
Rob West
Aloke Palsikar
1665.8k
6 days ago
Rocksen
Sky-watcher mount drives and PDH2 incompatibility: alternatives?
Sky-Watcher SynScan ProBeginnerHelp Needed +1
May 3, 2026Rocksen
Last post: Marcin Cikała
Marcin Cikała
TiffsAndAstro
Tony Gondola
3104
3 days ago
Frank "Voloire"
What have I really learned after these two months of mono?
AcquisitionProcessingMonochrome +1
Apr 25, 2026Frank "Voloire"
Last post: Dark Matters Astrophotography
Dark Matters Astrophotography
Jeffrey Kieft
Gregg Kamilar
Hugues Talbot
Sam Danigelis
16530
4 days ago
Jozef Bodden
Wanderer ETA Tilt Corrector N.I.N.A. connection button behavior
Stefan Berg Nighttime Imaging 'N' Astronomy (N.I.N.A. / NINA)Help Needed
Apr 26, 2026Jozef Bodden
Last post: Jozef Bodden
Fabrice Lamidey
Jeffery Richards
Dale Ghent
Jeffrey Kieft
Tony Gondola
13198
4 days ago
Interactive Sky
ZWO AM3N vs. Sky Watcher Wave 100i
Sky-Watcher Wave 100iEquipmentGoTo +7
May 2, 2026Interactive Sky
Last post: Nikguy
Nikguy
Franco Grimoldi
3176
4 days ago
George Smith
What Scope to Get
Equipment
May 2, 2026George SmithNew contributor
Last post: andrea tasselli
andrea tasselli
Tony Gondola
3119
4 days ago
HenryScholz
Help with Edge Hd 8 Backfocusing
EquipmentHelp NeededTroubleshooting
May 2, 2026HenryScholzNew contributor
Last post: Paul Larkin
Paul Larkin
John Stone
andrea tasselli
381
4 days ago
hisan koko
Where can I sell my telescope?
EquipmentBuying AdviceHelp Needed
May 2, 2026hisan kokoNew contributor
Last post: hisan koko
David Joyce
Tony Gondola
4158
4 days ago
Hassaan Zaheer
Cross pattern in Luminance channel
Sky-Watcher Explorer 150PReflectorsCalibration +4
May 2, 2026Hassaan Zaheer
Last post: GalacticRAVE
GalacticRAVE
bigCatAstro
andrea tasselli
992
5 days ago
Christophe tonnelier
Back focus distance for Celestron 0.63x reducer on NexStar 6SE
Celestron NexStar 6SE
May 1, 2026Christophe tonnelierNew contributor
Last post: DavesView
DavesView
Rick Veregin
363
5 days ago
rhombus
Planetary Camera Recommendation AP175 F8
EquipmentPlanetary CameraBuying Advice
Mar 31, 2026rhombus
Last post: andrea tasselli
andrea tasselli
Tony Gondola
TiffsAndAstro
ItsMeAstro
7124
5 days ago
Interactive Sky
Barlow lens comparison: Tele Vue Powermate vs Explore Scientific
ZWO ASI662MCBarlowCMOS +7
Apr 29, 2026Interactive Sky
Last post: Pete Bouras
Pete Bouras
Werner Stumpferl
andrea tasselli
4121
5 days ago
Mark Worthington
Best practice for preventing moisture damage
EquipmentTroubleshooting
Apr 29, 2026Mark Worthington
Last post: SonnyE
SonnyE
andrea tasselli
Scott Badger
Brian Puhl
6123
6 days ago
Dunk
New FSQ!
RefractorsNews
Mar 7, 2026Dunk
Last post: Dunk
Jeffery Richards
Alex Nicholas
Silvio F Carlos
John Stone
11410
6 days ago
Cameron Stout
Bright band at bottom of images with Canon 6D
Pleiades Astrophoto PixInsightDSLRHelp Needed +1
Mar 8, 2026Cameron Stout
Last post: Scott Stirling
Scott Stirling
Seizal Bong
bigCatAstro
SonnyE
Tony Gondola
12208
6 days ago
Joel Lee
Questions about and deciding on a Solar Set Up
EquipmentRefractorsSolar Filter +2
Apr 29, 2026Joel Lee
Last post: Joel Lee
Willem Jan Drijfhout
Paul Larkin
Tony Gondola
SonnyE
8141
6 days ago
Caleb Evans
Issue With Plate Solving
Pleiades Astrophoto PixInsightPlate SolvingHelp Needed
Apr 27, 2026Caleb Evans
Last post: Edwin Keur
Edwin Keur
Willem Jan Drijfhout
Scott Horton
Tony Gondola
Behnam Darvish
16731
7 days ago
Phil Creed
Realistic maximum for usable focal length
ZWO ASI533MC ProSeeing Conditions
Apr 6, 2026Phil Creed
Last post: Gamaholjad
Gamaholjad
Craig Towell
Tony Gondola
John Hayes
John Tucker
25622
8 days ago
Alexander Bouwman
Any suggestions: trouble achieving sharp focus with Edge HD
Celestron EdgeHD 8"
Mar 9, 2026Alexander Bouwman
Last post: Alexander Bouwman
John Tucker
Paul Larkin
Adam Hall
Scott Badger
Razvy
48862
8 days ago
Mark Worthington
Bigger scope for Jupiter imaging or dedicated cooled astro camera for DSO
EquipmentBuying AdviceJupiter
Apr 27, 2026Mark Worthington
Last post: Mark Worthington
Jeremy Jackson
TiffsAndAstro
andrea tasselli
Tony Gondola
Rick Evans
18167
8 days ago
Eric Gagné
Stellavita app 2.0 - Clear logs
ToupTek StellaVita
Mar 17, 2026Eric GagnéFrequent contributor
Last post: Eric Gagné
KJR
462
7 days ago
Frédéric Ruciak
A spreadsheet to convert Hocus Focus result in pratical move/turns of a manual tilt adapter plate
Stefan Berg Nighttime Imaging 'N' Astronomy (N.I.N.A. / NINA)EquipmentHow-to +1
Jan 7, 2026Frédéric Ruciak
Last post: Jozef Bodden
Jozef Bodden
ScottF
Jean Porter
6159
7 days ago
YingtianZZZ
A test for RASA + OSC in severe light pollution areas
Celestron Light pollution filter for RASA11 2"AcquisitionArtifacts
Apr 29, 2026YingtianZZZ
Last post: Rostokko
Rostokko
andrea tasselli
6119
8 days ago
Interactive Sky
Using 7nm dual-band Ha/OIII filters on fast f/3.8 systems
EquipmentCMOSFilters +7
Apr 28, 2026Interactive Sky
Last post: Rob Lyons
Rob Lyons
Rick Krejci
Alex Nicholas
Dunk
Tony Gondola
6116
8 days ago
Interactive Sky
Using 7nm dual-band Ha/OIII filters on fast f/3.8 systems
EquipmentCMOSFilters +7
Apr 28, 2026Interactive Sky
010
9 days ago
Seany75uk
Tracking /Guiding issues half way through an Imaging session.
Sky-Watcher HEQ5 PROGreen Swamp Software Green Swamp ServerOpen PHD Guiding Project PHD2
Apr 27, 2026Seany75uk
Last post: Seany75uk
Brian Puhl
Tony Gondola
dayglow
Ron
Alex Nicholas
19155
8 days ago
Jim Waters
Antlia SHO Edge 4.5nm and f/4 Scopes?
FiltersReflectorsNarrowband
Apr 27, 2026Jim Waters
Last post: Rick Krejci
Rick Krejci
Tony Gondola
Diego Alberto Craviotto
D. Jung
6100
9 days ago
Francesco Cogliandro
Suggestion on Siril workflow for DSO
Siril Team SirilProcessingBeginner +1
Apr 27, 2026Francesco Cogliandro
Last post: Tony Gondola
Tony Gondola
141
10 days ago
Showing 1-50 of 8785