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davidowenrogers

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  • Content Count

    14
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About davidowenrogers

  • Rank
    Nebula

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  • Gender
    Male
  • Interests
    Interests
  • Location
    Deddington, Oxfordshire
  1. Hello Tony, No guiding and first attempt at polar alignment. I'm just wondering what has been achieved by those more experienced than I with this kit. is a 120 second exposure ever achievable with this lot? Many thanks David
  2. Hello all, what is the longest exposure you have managed with a CPC 9.25 scope on a HD Pro wedge? I was trying to image M51 last night and was trying 120 second subs at ISO 1600 and had short star trails. is an exposure of 120 seconds an unrealistic expectation with my setup? Many thanks, David
  3. Hello Gina, I built an ASC using the 120MC and one of these Arecont Vision lenses ARMPL155 1 CS-Mount 1.55mm Fixed Focal Megapixel Lens Purchased from B&H Photo. The dome has been the tricky bit as the slightest imperfection ruins the effect. My neighbour was also very unhappy that I'd put a camera near his property. Less so once he saw the video. AllSky.mp4
  4. Hi there, any thoughts on heated dew shields for a Celestron Nexstar 5? I've got a roll-up shield with a velcro seam but wondered if it would be worth heating it as well as last nights imaging session was affected by dew even with the sheild. What are your thougfhts, pointless, invalauble, make your own, the best one is..... Many thanks David
  5. Was up at three as well and had a good imaging session of Jupiter watch the GRS advance across the face of the planet. Imaging was a little spoilt by dew for a while. I have to agree that the early morning display of the thin, cresent moon and the planets was spectacular and a real pleasure to just stand and watch.
  6. Thank you - have signed up and so far, very interesting.
  7. Taken last night Celestron Nexstar 5, x2 Barlow, ZWO ASI120MC, standard USB cable. 60 second sequence at about 10 frames per second. (578 frame AVI file 800 x 600) SharpCap 2.6 Dan suggested making a focuser and I saw one on ebay for a different scope (£35) based around a Futaba S3003 servo and some DIY wheels. Changed the bracketry to suit the Nexstar and it's certainly easier to change focus. Dew was a new issue, I've got a sheild tube but wondered what you all thought on heaters?04_20_15Z.bmp
  8. Thank you all. I have been using a longer USB cable than supplied with the camera mostly coz I walked into the shorter cable and nearly put the lot on the floor. I'll try 60 second series and go for a higher frame rate with a shorter USB cable and will look at making a USB focuser. The tripod is the bog standard £150 Celestron one which probably isn't up to the job but was a keen price. Many thanks for the tips on SharpCap and Registax - will try these recommendations. I've tried no barlow, x2 and x3 barlows and it's certainly easier without. Very many thanks to all, just need some good seeing.
  9. Hello Ronin, Many thanks for responding. I'm taking 30 second series of images and allowing 60 seconds to refocus and recentre the planet before the next set. There are about 160 images per series and I'm guessing at the best 80% of images in Registax. [ZWO ASI120MC] Pan=0 Tilt=0 Output Format=AVI files (*.avi) Binning=1 Capture Area=1280x960 ColourSpace=RGB24 Sensor Temp=5 Discard Split Frames=Off High Speed Mode=On Turbo USB=80(Auto) Flip Image=None Frame Rate Limit=Maximum Gain=50(Auto) Exposure (ms)=0.05 Timestamp Frames=Off White Bal (=95 White Bal ®=52 Brightness=0 Gamma=50 AutoExpMaxGain=50 AutoExpMaxExp=30
  10. Many thanks, have reposted in the imaging section. Best regards, David
  11. Hi there, I've just joined and I'd like to say, "Hello" to all. I've had a refractor and a 6" Newtonian on an EQ mount for many years but these were relatively modest instruments and in a moment of staggering generosity my neighbour offered my his Nexstar 5 (original version) which he purchased in the States many years ago. A number of very kind people in a number of Astronomy suppliers have offered boundless advice and I've added Celestron X-Cel eye peices (25mm, 12mm and 9mm) a Celestron x2 barlow and a Televue x3 barlow along with a ZWO 120MC camera along with a new HP i5 laptop with lots of RAM running SharpCap 2.6, Registax 6, Castrator and VirtualDub. The goal has been to get a "good" image of Jupiter but I'm struggling to do better than the attached image. The scope is collumated at the start of each session. I've tried a Bhatinov mask to aid focusing and I think I can get better results without using it. What I find suprising is that the image through the eyepeice is fantastic but I can never get close to that level of image sharpness on the laptop screen. I'm putting down to poor seeing conditions and problems focusing but am very willing to accept that I may not have the patience to achieve the very best focus possible as every time I touch the focus knob the image takes an age to stabilise and the very finest of focusing moves are lost in the general abberation of atmospheric variation. There doesn't seem to be a better focuser available for this original model Nexstar nor an available motor focuser (an American company lists one but no-one has been able to supply it) So, hello from Deddington and any suggestions other than move to Barbados and buy a 14" are very welcome! PS - Merry Christmas. David
  12. Just joined and I'd like to say, "Hello" to all. I've had a refractor and a 6" Newtonian on an EQ mount for many years but these were relatively modest instruments and in a moment of staggering generosity my neighbour offered my his Nexstar 5 (original version) which he purchased in the States many years ago. A number of very kind people in a number of Astronomy suppliers have offered boundless advice and I've added Celestron X-Cel eye peices (25mm, 12mm and 9mm) a Celestron x2 barlow and a Televue x3 barlow along with a ZWO 120MC camera along with a new HP i5 laptop with lots of RAM running SharpCap 2.6, Registax 6, Castrator and VirtualDub. The goal has been to get a "good" image of Jupiter but I'm struggling to do better than the attached image. The scope is collumated at the start of each session. I've tried a Bhatinov mask to aid focusing and I think I can get better results without using it. What I find suprising is that the image through the eyepeice is fantastic but I can never get close to that level of image sharpness on the laptop screen. I'm putting down to poor seeing conditions and problems focusing but am very willing to accept that I may not have the patience to achieve the very best focus possible as every time I touch the focus knob the image takes an age to stabilise and the very finest of focusing moves are lost in the general abberation of atmospheric variation. There doesn't seem to be a better focuser available for this original model Nexstar nor an available motor focuser (an American company lists one but no-one has been able to supply it) So, hello from Deddington and any suggestions other than move to Barbados and buy a 14" are very welcome! PS - Merry Christmas. David
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