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nicks90

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Everything posted by nicks90

  1. This thread is getting way serious and professional...but here's my first proper attempt at a using my new Canon 100d M42 210 X 10 second subs. F5.6 and iso800 at about 200m I think. Skywatcher goto altaz mount. I have 2 versions. One with little nebula and a good core and this one with lots of fluffy but a blown core and what looks like vignetting . Still have absolutely no idea what to do in gimp ...or even what settings I should use in dss to stack. But it's all good fun.
  2. heres my setup with me being all ghostly
  3. you are right, the gradient will 'spread' across the bottom of the image and up the sides due to field rotation. But... how many hours of subs in a single sitting are people taking here? Look at the overall angular rotation of something like Leo over 2 hours by watching it move in stellarium in fast forward... few degrees maybe?
  4. As long as it's perfectly balanced and windless night, worth a stab!
  5. I don't have that installed, but I will certainly be putting it on! Thanks mate
  6. i would do, but finding the adaptors to connect my camera to the scope is like hens teeth... plus the little f5 frac has a woefully cheap and nasty focuser. Might give it a go though, see what happens
  7. I would be furious to spend that much money on a scope and for it to come with such fundamental flaws. However this is all too common nowadays. Brand new landrover discovery and rangerover still fit aluminium bodies to steel subframe units and use plain steel fixing bolts and screws. You would think after 60 years of suffering electrolytic corrosion they would have learnt something. But no. Poor quality fixings, no sacrificial electrolytes, no rubber buffers, no galv coatings... 4 year old discos are needing the angle grinder taking to them to remove body parts when fixing accident damage. Sad state of affairs on a £60k + luxury motor.
  8. might as well add my little first effort at using an az mount to the thread - certainly nowhere near as good as some of them on here, but i'm still quite proud! Orion widefield all taken in my terribly light polluted back garden using a skywatcher az goto mount samsung nx100 with antique 50mm Pentax SMC prime at F2.8 38 x 30 sec exposure at iso 400 - no dark or bias Stacked in DSS using all the default settings then a quick mess with levels in Gimp, but i have no idea about how to do anything else with it. I really need to sit down and watch some processing videos, but its just finding the time! Even with such hamfisted "processing" and poor focus and horrendous light pollution - you can spot the flame neb!
  9. i'd definitely go for the 32mm panaview ep and 2" 90deg diagonal. having had a go of a st102 with the same ep and diagonal I can say the views were lovely! As for lunar, dont go overboard with mag! your mount isnt sturdy enough, moving the scope to track the moon will induce tears of frustration at over x150 and it'll wobble like hell giving jittery views. personally I would stick with a max of x100 - even in my 12" dob i rarely go over x100 for lunar viewing! You arent going to see the lunar lander, so accept it and view the craters and rilles with a bit of the surrounding scenery and enjoy the view! A rock steady view of copernicus thats fairly small in the eyepiece will still yield much more detail and enjoyment than a jiggly view that fills the field of vision where you cant make out anything!
  10. Do you have any testing piccies to show the sphere in all its glory?
  11. That all sounds properly complicated Ajohn. I like the way Mr Dobson did it in a youtube video i watched of his 16" mirror. He stuck the mirror in his scope and pointed it at the glint of sunlight on a power line insulator and just looked at the brighter and darker bits of the out of focus image and went back to work on grinding the errors out.
  12. Damian, at what point do you mask off the outer 1/2" of the mirror to 'fix' you TDE? Have you set an maximum limit on man hours, or is that not an option?
  13. might be a daft question.......actually two questions..... does the temperature of the glass influence the polishing of the mirror? Does the mirror get warm when you polish away due to friction, therefore would the big slab cool down the mirror a lot more than a bit of old kitchen worktop and will that make a difference to the grind? does/can the mirror flex under the weight of the tool? if so, is there a chance the scabby swollen worktop was allowing flexure and causing your polishing problems?
  14. Damian, wont those scratches - especially the one in the centre - not dissappear when you parabolise it?
  15. and you didnt think to join the bits of foil with some cellotape? lovely story so far and really enjoying the read.
  16. would you say these are optically on a par with the legendary televue plossls with some added benefites - such as better eye relief?
  17. nicks90

    ISS

    From the album: Nicks Widefields

    samsung NX100 camera, 30mm F3.6 6 exposures of 5 seconds, 800ISO of ISS passing close to Jupiter.
  18. nicks90

    Nicks Widefields

    collection of widefield constellation images
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