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JimD

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About JimD

  • Rank
    Nebula

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  • Website URL
    http://www.jimsbeerkit.co.uk

Profile Information

  • Gender
    Male
  • Interests
    Home Brewing, Music, and now stargazing.
  • Location
    North East UK
  1. Not sure what's happening with the curve there - try longer strokes with the tool on top maybe? That should in theory grind the centre of the tool more and decrease the curve. Good luck with it, anyway.
  2. Nice. I've viewed Jupiter by daylight through the scope before, but didn't try for a pic.
  3. Thanks for posting your settings, IH, it's useful. I'll have to try this another day, though, as I haven't been able to get out tonight (despite having clear skies!)
  4. I understand exactly what you're saying, James. I'm not sure exactly what this webcam is doing, though - I've refitted the webcam lens so that I can take daytime test shots, and it's without doubt capturing a higher resolution picture at 960 x 720 than it is at 640 x 480. The difference between 960 x 720 and highest resolution of 1280 x 960 is less discernable. The frame rate is set automatically, and jumps back to the auto-selected rate if you try to change it. There seems to be a yellow cast over the picture at the lower resolution - don't know if that's significant or why it's happening. Incidentally, the lowest gamma setting I have available in Sharpcap is 180. The range is 180 to 250. I'm using Windows XP and the driver that was (automatically) installed is called "Microsoft XBox 360 Live Vision Security Method 3". Is that the same driver that others with this webcam are using?
  5. I don't quite get this bit. Jupiter is quite small in the camera's field of view, but if I reduce the resolution it stays the same size, but has courser pixels. How does that improve the image?
  6. I tried hanging a plumb line up to cast a shadow accross the patio yesterday. The sun was out in the morning when I tested it out, then conveniently went behind clouds for an hour or so, covering the period of solar noon (12.20 here). Then it came out again in the afternoon. I'll try again today!
  7. Hmm, with so many amateur and professional eyes constantly watching Jupiter it would be very surprising to say the least if this was a real event rather than an image artefact.
  8. My thoughts, for what they're worth. The content of the programme is one thing and is very important; the presentation of it is quite another, and what SPM brought to the presentation side of it was an infectious enthusiasm for all aspects of astronomy (not just for our back-garden hobby, but also for cutting edge astrophysics and space exploration). That's the gap to be filled imo.
  9. Just down the road from me. I doubt if the price will stay that low, though!
  10. Thanks James. Unfortunately, it's not that easy to set the frame rate on the webcam - it seems to be linked to the resolution and can't be changed independantly. Because I don't have a motor drive, my capture time is limited to about 30 seconds, which is the time it takes for Jupiter to cross the field of view (I daren't touch the scope to follow it, as the image bounces all over the place). It's recording about 250 frames in that time. Do you think that's enough for a meaningful stacking?
  11. Thanks for that, Steve - I'll give it go next clear sky.
  12. Doh!! Since I can't edit those bitmaps out of the post, I'll just have to repost the 3 images here.
  13. Hi all, I need help! I've acquired an X-Box webcam, and attached it to my E150P. I got a couple of OK shots of the moon with it, but not having much luck with Jupiter. I don't have a motor drive yet, and I was hoping to use RegiStax to align the frames of the moving image, but I'm not sure if the basic raw AVI is not good enough or if I'm not using RegiStax properly. I've posted the best still frames I can find from a few sequences, hopefully someone can tell me where I'm going wrong. I'm using Sharpcap to capture the AVIs (setting are below each pic). I tried using lower resolutions, but the result was similar quality, just more pixelated. Higher gains/exposure just resulted in the image being washed out. Capture 15_02_2013 18_08_14 RAW STILL.bmp Frame Divisor=1 Resolution=1280x960 Frame Rate (fps)=7.50 Colour Space / Compression=YUY2 Exposure=-10 Brightness=128 Contrast=32 Hue=0 Saturation=53 Sharpness=0 Gamma=180 WhiteBalance=3447(Auto) BacklightCompensation=0 Gain=0 Capture 15_02_2013 18_10_10 RAW STILL.bmp Frame Divisor=1 Resolution=1280x960 Frame Rate (fps)=7.50 Colour Space / Compression=YUY2 Exposure=-10 Brightness=128 Contrast=32 Hue=0 Saturation=53 Sharpness=0 Gamma=180 WhiteBalance=3447(Auto) BacklightCompensation=0 Gain=0 Capture 15_02_2013 18_14_54 RAW STILL.bmp [This one had a 2x Barlow added] Frame Divisor=1 Resolution=1280x960 Frame Rate (fps)=7.50 Colour Space / Compression=YUY2 Exposure=-9 Brightness=128 Contrast=32 Hue=0 Saturation=53 Sharpness=0 Gamma=180 WhiteBalance=3447(Auto) BacklightCompensation=0 Gain=3
  14. Great success with this last night - My brother in law was round last night (he's been gagging to have a look through my scope ever since he found out I'd bought one ), and we couldn't wait for dark, so were having a look at the moon. I wondered if it might be possible to see Jupiter even though it wasn't visible to the naked eye (it was about 4.30 and about an hour from sunset). Bring on the setting circles - checked on Stellarium for the RA of the moon (about 4hrs) and Jupiter (about 2hrs) and set the RA setting circle accordingly. Diallied in the declination for Jupiter (about 20) and swung back through 2 hrs of RA - Jupiter appeared in the WA eyepiece with just a tiny bit of fiddling with RA. I had a bit of problem with the RA circle sticking, so it took a couple of goes, but I did it!
  15. Well it's a start, I suppose. Jupiter was just totally overexposed. I was supposed to be helping with the dinner while I was doing it, though.
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