Page 1 of 2 12 LastLast
Results 1 to 10 of 17
Like Tree2Likes

Thread: Nexstar 5SE Tracking - Am I Expecting too much?

  1. #1
    Markmapo's Avatar
    Markmapo is offline White Dwarf
    Points: 176, Level: 3
    Level completed: 52%, Points required for next Level: 24
    Overall activity: 8.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Mar 2019
    Location
    UK
    Posts
    5
    Points
    176
    Level
    3
    Thanks
    0
    Thanked 0x 0 Posts

    Question Nexstar 5SE Tracking - Am I Expecting too much?



    Hope someone can help. Am I expecting too much from my scope tracking?

    I have a Celestron Nexstar 5SE. Generally really like it but have recently tried to get into astrophotography as well as visual and it's problematic.

    Following alignment, Goto works pretty well (sometimes spot on) but tracking is very hit and miss. By that I mean that the target will invariably slowly drift out of view (usually to the right and down - on the capture screen in SharpCap) within a few minutes. And is basically almost never "stable" in the frame.

    For visual this isn't really a problem as only a quick tweak on the controller is needed to bring it back, but for photography it's a bit of a problem.

    It's often very difficult to get even a 5 second exposure without some drift.

    I know that the 5SE is Alt/Az and so it's not ideal for photography but I should be able to get 10 maybe 20 seconds without any rotation noticeable - if only it would track better.

    Does anyone have similar setup / experience?

    Am I realistically expecting too much from the 5SE mount, or does anyone have some tips to improve things.

    Thanks for any advice

  2. #2
    Gabby76's Avatar
    Gabby76 is offline Super Moderator
    Points: 80,899, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 74.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!Gallery Achievement!Album Achievement!50 Posts Achievement!
    Awards:
    Activity & Post & Thread Master
    Join Date
    Jan 2016
    Location
    Live: Slovakia Work: Canada
    Posts
    18,728
    Points
    80,899
    Level
    100
    Thanks
    3,590
    Thanked 5,886x 4,936 Posts
    Blog Entries
    4

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    Hello and welcome to the forums
    Adjust your backlash settings and use a reticle eyepiece for accurate centering of alignment stars should help a bit.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    The weakest link in the optical chain is the large nut located directly behind the
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    / camera. - Gabrielle

    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

  3. #3
    mstar74's Avatar
    mstar74 is offline SUPER GIANT
    Points: 13,083, Level: 78
    Level completed: 96%, Points required for next Level: 17
    Overall activity: 9.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!365 Days+ Registered Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Jan 2012
    Location
    SF Bay Area
    Posts
    945
    Points
    13,083
    Level
    78
    Thanks
    137
    Thanked 299x 249 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    As Gabby pointed out, it sounds like you need to adjust your backlash settings (especially if the drift occurs immediately after a goto or manually adjusting the position of an object). The correct final approach directions for gotos and for manually centering an object can help eliminate drift as well (see: Solution needed for alignment with Nexstar Celestron 5SE.)

    Here's a post on astrophotography with your scope: NexStar 5SE for Astrophotography.
    Gene

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    Meade Star Navigator 102, LXD55 127mm f9.3; Celestron 102GT, 60LCM, C80ED, Omni XLT 150 and Az 114; Sky-Watcher 90 MAK;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    10" Dob; Orion StarSeeker IV 80mm
    Mounts: Celestron CG-5, Nexstar GT, SkyProdigy;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Smart EQ Pro; Orion Starseeker IV
    Cameras: Olympus E-PL1, Canon T3i, Canon T5(full spectrum modified)
    Accessories: Baader 2" MPCC, IDAS LPS-D1 Filter, William Optics P-F6A-GT81 reducer/flattener, Orion MM AutoGuider

  4. #4
    spereira's Avatar
    spereira is offline HYPER GIANT
    Points: 12,931, Level: 78
    Level completed: 52%, Points required for next Level: 169
    Overall activity: 28.0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Oct 2014
    Location
    Bedford, NH, USA
    Posts
    2,468
    Points
    12,931
    Level
    78
    Thanks
    535
    Thanked 503x 414 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    Hi Mark, and welcome here to the Forum!

    Great advice there from Gaby. I'd say that AP with an alt-az mount will be iffy at best. The folks who know best here all recommend a good equatorial mount for AP. Alt-az mounts may be acceptable for very short exposure times, or with short video captures for post processing into a still image.

    Good lock.

    smp
    Stephen
    - - - - - -

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    Tele Vue TV-85
    Solar: Daystar Quark (chromosphere)
    Mount: Explore Scientific Twilight I tripod w/ Celestron NexStar GT mount
    Local Club: New Hampshire Astronomical Society

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  5. #5
    Markmapo's Avatar
    Markmapo is offline White Dwarf
    Points: 176, Level: 3
    Level completed: 52%, Points required for next Level: 24
    Overall activity: 8.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Mar 2019
    Location
    UK
    Posts
    5
    Points
    176
    Level
    3
    Thanks
    0
    Thanked 0x 0 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    Thanks to everyone for the advice so far. Clear sky tonight so I'll be out there trying again!

  6. #6
    Gabby76's Avatar
    Gabby76 is offline Super Moderator
    Points: 80,899, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 74.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!Gallery Achievement!Album Achievement!50 Posts Achievement!
    Awards:
    Activity & Post & Thread Master
    Join Date
    Jan 2016
    Location
    Live: Slovakia Work: Canada
    Posts
    18,728
    Points
    80,899
    Level
    100
    Thanks
    3,590
    Thanked 5,886x 4,936 Posts
    Blog Entries
    4

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    The best time to set the backlash is during the day, it will usually only take about 10-15 minutes to get it all done.
    BABOafrica likes this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    The weakest link in the optical chain is the large nut located directly behind the
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    / camera. - Gabrielle

    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

  7. #7
    Markmapo's Avatar
    Markmapo is offline White Dwarf
    Points: 176, Level: 3
    Level completed: 52%, Points required for next Level: 24
    Overall activity: 8.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Mar 2019
    Location
    UK
    Posts
    5
    Points
    176
    Level
    3
    Thanks
    0
    Thanked 0x 0 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    Thanks everyone for the advice - much appreciated.
    So finally got time to adjust the backlash and had a couple of clear nights (weather in UK pretty bad until last few days).
    I even had a crack at using a wedge (home made) + polar alignment using Celestron ASPA. Despite slight improvement in tracking I still only seem to manage max of 10 to 15 sec exposures before there is bad drift.
    Basically - am I expecting too much from the 5SE Alt Az mount? I'm hovering over buying an advanced VX mount (and who knows maybe a little refractor). Is it worth persevering with the 5SE (in Polar) or is the AVX going to be a worthwhile (fairly expensive!) upgrade.
    Thanks again for any advice.
    BABOafrica likes this.

  8. #8
    workmapo's Avatar
    workmapo is offline White Dwarf
    Points: 207, Level: 4
    Level completed: 14%, Points required for next Level: 43
    Overall activity: 0%
    Join Date
    Feb 2019
    Location
    uk
    Posts
    1
    Points
    207
    Level
    4
    Thanks
    0
    Thanked 0x 0 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    So,
    A bit of an update and a plea for more help / advice.

    Generally I really like the 5SE it all attempts to improve tracking (for astrophotography) are less not entirely successful.

    Following alignment, Goto works pretty well (sometimes spot on) but tracking is very hit and miss. By that I mean that the target will invariably slowly drift out of view (always to the right!) within a few minutes. And is basically never "stable" in the frame.

    It always drifts the same way, it always drifts at the same speed - it's as though the tracking rate is slightly off.

    For visual this isn't really a problem as only a quick tweak on the controller is needed, but for photography it's a bit of a problem.

    It's often very difficult to get even a 5 second exposure without some drift.

    I know that the 5SE is Alt/Az and so it's not ideal for photography but I should be able to get 10 maybe 20 seconds without any rotation noticable - if only it would track better.

    Does anyone have similar setup / experience?

    Should I be able to get better tracking - or am I wasting my time?

    Am I realistically expecting too much from the 5SE mount, does anyone have some tips to improve things.

    Thanks.

    (Setup is 5SE with Celestron Reducer/flatener using NexRemote / ASCOM / SharpCap / Cartes du Ciel and/or CPWI)

  9. #9
    BABOafrica's Avatar
    BABOafrica is offline Moderator
    Points: 64,808, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 95.0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points400+ Posts Achievement365 Days+ Registered Achievement!5 Threads Achievement!
    Join Date
    May 2011
    Location
    Nairobi, Kenya
    Posts
    7,100
    Points
    64,808
    Level
    100
    Thanks
    1,479
    Thanked 3,228x 2,852 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    Quote Originally Posted by workmapo View Post
    So,
    A bit of an update and a plea for more help / advice.

    Generally I really like the 5SE it all attempts to improve tracking (for astrophotography) are less not entirely successful.

    Following alignment, Goto works pretty well (sometimes spot on) but tracking is very hit and miss. By that I mean that the target will invariably slowly drift out of view (always to the right!) within a few minutes. And is basically never "stable" in the frame.

    It always drifts the same way, it always drifts at the same speed - it's as though the tracking rate is slightly off.
    I doubt the tracking rate is off. But you could measure it if you wanted to. It has to be exactly 0.25 degrees per minute or 1 degree for every four minutes. Measure the number of degrees of movement over a period of 32 minutes (64 even better). It should be exactly 8 degrees (or 16 degrees).

    Joe
    In lumine tuo videbimus lumen


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    : WO ZenithStar SD f/5.9 66mm APO -- Meade f/9 102mm APO -- Celestron SCT C8 -- Sigma f/5.6 400mm APO lens
    MOUNT: Celestron AVX & Atlas EQ-G

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    CAMERA: Fujifilm X-A1 (mirrorless) / Orion-SSAG

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    : DSS -- StarTools -- GIMP -- Bahtinov Grabber 64

  10. #10
    Pauls72's Avatar
    Pauls72 is online now HYPER GIANT
    Points: 18,443, Level: 93
    Level completed: 86%, Points required for next Level: 57
    Overall activity: 39.0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jul 2009
    Location
    LaPorte, IN USA
    Posts
    1,873
    Points
    18,443
    Level
    93
    Thanks
    6
    Thanked 647x 499 Posts

    Default Re: Nexstar 5SE Tracking - Am I Expecting too much?

    In your hand controller make sure your tracking rate is set to Sidereal.

    Alt/Az are not designed for AP. Alt/Az mounts track across the sky in a motion like climbing a set of stairs. So every tracking motion the mount moves left/right or up/down. An EQ mount tracks in a nice smooth arc across the sky. With an Alt/Az you end up getting the stair step tracking motion in addition to rotation.
    Mounts: EQ1, LXD55, Atlas EQ-G (one with Rowan belt mod, EQ6-Rail and one without)
    Scopes: C11, 8" Reflector, 102mm MCT, ST80, W.O. FLT98, 6" RC, Lunt LS50THa/B400
    Cameras: Canon XTi, DSI-C, DSI, ST402, QHY8L, QHY183C, QHY163M, ASI120MC-S (Allsky)
    Some of my Pic's http://www.astrobin.com/users/Pauls72/

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. Nexstar 8SE tracking
    By fyr4efect in forum Astronomy Beginners Forum
    Replies: 4
    Last Post: 05-19-2017, 10:37 AM
  2. Nexstar 8se tracking is off.
    By Fordpaterson in forum Astronomy Beginners Forum
    Replies: 11
    Last Post: 02-15-2014, 04:57 AM
  3. NexStar 8SE Tracking
    By camknox in forum Celestron NexStar Telescope Forum
    Replies: 43
    Last Post: 06-08-2012, 11:45 PM
  4. Tracking A NexStar 6SE
    By Al Eidenberg in forum Celestron NexStar Telescope Forum
    Replies: 2
    Last Post: 04-24-2012, 12:09 PM
  5. Nexstar 5se tracking
    By genesbrown in forum Celestron NexStar Telescope Forum
    Replies: 15
    Last Post: 05-05-2010, 10:33 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 09:36 PM.