Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

  • Announcements



Advanced Members
  • Content count

  • Joined

  • Last visited

Community Reputation

4,661 Excellent


About StuartJPP

  • Rank
    Brown Dwarf

Profile Information

  • Gender
  • Interests
    Birding and now a bit of astrophotography.
  • Location
    Leeds, UK
  1. Platesolving in APT

    I use APT and at the beginning of a session I point the scope towards the home position (roughly) and sync the mount to that position. Then slewing to any target is near enough for both ASPS and PS2 to be able to successfully plate solve by clicking the "<<Scope Pos" button to populate the approx RA and approx DEC fields with where the mount thinks it is pointing towards. Once synced I haven't had any problem with either of the two methods when clicking the "<<Scope Pos" button to give both a fair chance of knowing where your mount is basically pointing. You do need to ensure that your pixel scale is correct (focal length and pixel size) otherwise neither will solve. My pixel scale is not massive (Full frame camera @ 500mm) so maybe that makes mine more forgiving to initial pointing errors.
  2. DSS going open-source

    Good news about DSS going open source but bad news about Sander. I don't think people realise how much effort can go to making some source code suitable for public consumption, especially if it was a part-time project. If Luc (the author of DSS) wasn't a complete pedant, the code could be quite "embarrassing" so a good tidy-up may be in order before initial release. During my career I have seen code for medical devices that have been coded by highly paid contractors that are not fit for public consumption as they would get ripped apart and ridiculed. My favourite quote is from C.A.R. Hoar e: There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult.
  3. Hi Piero, The StarGo is mounted via an Arca Swiss dovetail and two Arca Swiss clamps (items I already owned). In the image(s) below you can see that there is an Arca Swiss plate attached to the bottom of the M-Zero via a couple of spacers. The StarGo has two Arca Swiss clamps mounted via 2 spacers. This allows me to remove the StarGo relatively easily if I need to. It also adds some extra counterweight as it is further away from the centre of rotation and opposite the lens and camera. You will also notice that I made up my own motor cable with a right-angle connector to allow the StarGo to be butted up against the RA section. All the tapped holes were present in the M-Zero and StarGo so I didn't have to drill and tap anything. However I had to ensure that the screws were long enough to be secure but short enough to not damage anything in either the StarGo controller or the motor section of the M-Zero.
  4. Qhy5ii-L mono

    The focal length of the miniGuideScope is about 125mm and I use it to guide my 500mm focal length lens so a shorter focal length guide lens will be usable as long as it is a decent quality one so that the stars aren't too distorted. You will need the correct type of CCTV mounting of course, if your camera currently has a CS mounting then it is best, it is easier to add a 5mm spacer than it is to remove metal....most (but not all) CCTV lenses are CS these days. I do have a 75mm CCTV lens somewhere but I haven't tried it as I got it after I got the miniGuideScope. I will try it at some point but not sure when...
  5. max sub length

    Good answers from above... here's mine which pretty much says the same thing.... There is a sweet spot somewhere in the middle of exposure length and number of exposures. Total exposure time is what matters the most. Expose for too long and you end up with saturated stars and the chances of throwing a lot of data away in the case of something going wrong for a single sub. Additionally you have to give the stacking algorithms something to work with, only having a couple of subs in the pot doesn't help. Expose for too short and everything is stuck in the noise...
  6. Show us your set up in action at night.

    This was in Caleta du Fuste...I can PM you the actual place I used.... Certainly not an ideal imaging site....but not too bad when you get away from the promenade lights.
  7. Canon EOS 600D Full Spectrum Mod Query

    As mentioned, live view focus (contrast, not phase/quick) will still work. It would be much easier to use a tripod to focus in live view or use one of those loupe/eyepieces that attach to the rear LCD and use it that way with contrast based live view focusing during the day. I doubt that you would be able to get (phase) focus spot on by removing and adding various filters...Gary mentions 1/8th of a turn or something similar for certain modifications but I am not sure how accurate that would be...and it would be a fair bit of trial and error getting it all correct and square as well.... Personally I'd forgo the auto-focus and make sure the sensor is replaced exactly where it was give or take a bit on EACH shim. However there will be a position that the sensor will be in where phase AF will work...so technically it would be possible.
  8. As mentioned, a small netbook is more than adequate.
  9. Hi Jules, No problem. I didn't think this would run full HD at full speed...it is more of a guiding netbook than a power netbook.
  10. Core of NCG1333

    Thanks for the comments everyone
  11. M82

    Looks pretty awesome to me!
  12. Canon 6d

    Hi @RichLD, no problem.... here's my view. I have got both a modified 6D and 650D as well as the Samyang 135mm f/2 lens... however I haven't used the Samyang with the 6D at all to be honest so I am not too sure about how bad the corners are on the 6D in respect to coma and vignetting wide open. Probably something I should do to be honest. With respect to the 6D vs. the 650D, in my view the 6D blows it away in terms of noise so I almost exclusively image with the 6D. My 6D is modified (by me) but it isn't necessary of course and there are plenty of targets out there where it will not make any difference anyway. As mentioned the 6D is a good full frame camera in its own right so if you find you don't use it much for astro you can always use it for daytime photography. For me, I have my 5D3 for that. I have no intention of going down the dedicated astro camera route at this point so for the foreseeable future the 6D will be my weapon of choice. It may not be the best solution but I am happy with my investment in it and what it does for me. This page here kind of illustrates the difference between the two in a real world comparison: http://dslrmodifications.com/6DReview/6DReview.html
  13. Plate solving

    Agree 100% with above....
  14. Hi, I'd have to check but I wouldn't hold out too much hope considering its vintage...what do you usually use to playback your video (VLC etc.) and I will try to see....if you can link to some video footage specifically I can try....
  15. Core of NCG1333

    Spent a bit of time processing just the core of this object, quite pleased with the outcome. Image acquisition details in the original thread: