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.



Advanced Members
  • Content count

  • Joined

  • Last visited

Community Reputation

113 Excellent

1 Follower

About groberts

  • Rank
    Proto Star

Profile Information

  • Gender
  • Location
    Surrey, UK

Recent Profile Visitors

1,438 profile views
  1. Magnificent Rudy, congratulations on a wonderful image and with a DSLR - the colours, sensitivity and depth are outstanding. Graham
  2. groberts

    EQmod Latitude & Longitude Help

    The above link doesn't seem to take you to the list I posted, if you Google EQMOD Youtube it should come up?
  3. groberts

    EQmod Latitude & Longitude Help

    Chris Shillito has produced a comprehensive and useful set of videos on how to use EQMOD / ASCOM which you can find on the link below. Setting Site Information is what you want but I recommend watching the others too, they're all very helpful. Graham
  4. Excellent picture Gav + many congratulations. Markarian's Chain is a great subject and this image is well worth the considerable effort.
  5. groberts

    Focusing on Planets

    Thanks for the guidance everyone, will give them a try once the clouds part!
  6. 99% if the time I concentrate on DSO imaging but this time of the year + with Jupiter at opposition, I thought I'd wheel out the ZWO120MC and give it a go. The first problem is that because I do this so infrequently I can't remember what to do but then I seem to muddle on and with luck end up with something vaguely recognisable. No such luck last night with Jupiter but hopefully there will be clear skies again in time to give it another try - some hope! My WO GT81 is not ideal for planetary imaging but OK'ish, however, my usual nemesis focusing seems to be the big hurdle. Using Firecapture I can get a reasonable size image on the screen - allowing for current poor seeing conditions - but is there some way to improve focus. I understand that for planetary imaging focus will come and go due to the atmosphere and Registax will sort out the wheat form the chaff thereafter but even so reliable focusing seems to be near to impossible, or is there a trick I'm missing? Thanks, Graham
  7. How did I miss this thread, still better late than never. Looks exactly what I need + just ordered from FLO with great anticipation. Thanks Steve + hope it's selling well? Graham
  8. groberts

    Flats Advice?

    The picture is probably not a good angle, as from the front illumination is quite even across. Notwithstanding, there is a very slight diminution in light at the far edges - approx 0.5cm or less. However, with the span of the pot larger than the aperture + the scope close up to the front at <= 0.5cm this gets lost and the result is OK i.e. make sure the diameter is larger than the scope and place close-up; it is also important to cover the underlying LED with white T-shirt material to dissipate the points of light within. The images from my scope + ZWO1600 can sometimes show a little vignetting but with the flats taken with this set-up are fully corrected. In the long run I would like to find something else larger but equally simple & convenient to use. Any ideas? Graham
  9. groberts

    Flats Advice?

    OK, the pictures below show what I've done. The LED pod at the base of the flower pot has velcro on the back which attaches to velcro on the bottom of the pot - so you can (a) take it out to turn on and off - the button is on the side and (b) attach small piece of white t-shirt fabric to dissipate the individual LED lights. This sort of LED is cheap a readily available at Dyas or somewhere similar for only a few £. I've painted the inside of the pot white to improve light quality. Then I just stretch two layers of white t-shirt fabric across the top of the pot, held on with a rubber band. Finally, as you can see, with further engineering prowess the pot is held onto a spare bar with rubber bands fixed onto an old tripod. You then need to experiment the best distance from the front of the telescope aperture to get the light value & spread you want - in my case I'm using 25,000 ADU and place it about 1cm from the from of the scope. OK it's a bit crude but is cheap + quick and easy to use and the resulting flats work well. Should say I have a WO GT81 refractor but I suspect this might not work so good over 100mm, not sure? Maybe I'll get round to something more sophisticated one day but for now it works for me. Hope that helps? Regards, Graham
  10. groberts

    Flats Advice?

    Same as usual work flow for flats: place light source in front of telescope aperture + set ADU + calculate exposure time for each filter + take flat image set for each filter. It's attached to the tripod with a rubber band! it is quite light so holds on OK. I place it quite close to the aperture + central and then go to the computer and run through the sequence above for each filter. Works like a dream
  11. groberts

    Flats Advice?

    +1 for daylight but I've also long successfully used a white t-shirt (double folded) stretched over a flower pot with a cheap cylindrical LED light attached with velcro on the base - I also have a layer of white t-shirt over this too. I used to hold it in front of the telescope aperture but now have it on an old tripod and place it close to the aperture so I can then just work through each flat using APT. Works a treat + v low tech!
  12. groberts

    Horsehead nebula in Narrowband

    Can add nothing new, except to say this is a wonderful image that literally throws new light on the Horsehead region. Can't see why you'd not be happy with this Sara, it is fantastic!
  13. groberts

    Three mono deep skies

    Very nice + hold great promise with the addition of colour. As a matter of interest what Gain & Offset settings did you use?
  14. groberts

    Plate Solving

    Great, makes a good starting point + many thanks.
  15. groberts

    Plate Solving

    Thanks, that's very encouraging. So, if I may continue on this theme and to be clear: What would be the maximum acceptable pixel limit for plate solving? What would be good Point Craft settings, in particular Number of GoTo++ attempts, acceptable pixel error & time out? I just list all sets of images pre & post flip in DSS as usual, register and stack and DSS sorts it out?

Important Information

By using this site, you agree to our Terms of Use.