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Nigel G

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Everything posted by Nigel G

  1. It's very annoying and frustrating, it would seem that not all Canon's suffer with banding, I know some people who have the same camera's as me who do not have the problem, unfortunately both my 1200 & 1300 do. I eventually saved enough money to by a dedicated astro camera, the relief of good quality bandless data was truly uplifting. Since I have sold my ZWO OSC and now have mono and filters I do still use the Canons from time to time for a quick OSC grab, but am quickly reminded of banding. There's plenty of ways to tackle the banding shown in previous comments, and still very good astro images taken. Sometimes darks would work but not always, Star tools V1.7 has some excellent new features to help with horizontal and vertical banding in the wipe module. Good luck and hang in there
  2. I used Astro pixel processor for stacking, there's a bit of a crop but not much, Here's a single exposure, no crop.
  3. Sorry for late reply, these are single exposures on a static tripod. I have since stacked 22x4 second exposures 135mm lens static tripod
  4. I visited a local boatyard to see and photograph comet Neowise. With a good view to the north it's perfect. This also was my first chance to photograph noctilucent cloud which I have only ever seen once before, so a great night for me I ended up taking 1600 images also making a time-lapse. Camera and lenses, Canon 1300d, stock 55mm & a 135mm f3.5 lens Thanks for looking.
  5. From the album: Deep Sky images.

    LRB=HSO No green channel. 6 hours @ 240s ZWO 1600 & 7nm filters Ha, Sii, Oiii. Equinox 80ED
  6. From the album: Deep Sky images.

    LRB=HSO. No green channel 4 hours @ 240s ZWO 1600 & 7nm filters. Ha, Sii, Oiii. Equinox 80ED
  7. From the album: Deep Sky images.

    LRB=HSO No green channel. 6 hours @ 240s ZWO 1600 & 7nm filters Ha, Sii, Oiii. Equinox 80ED
  8. Wow, I have a fairly good image showing this Quasar, superb
  9. Thanks for the info. I must attempt this
  10. The most distant known object I have captured, even further than IC 1101 at a mere 1.04 billion light years distance. Some of you may also have caught this large galaxy without knowing about it. IC 2729 in the Leo triplet of galaxies, near the Hamburger galaxy NGC 3628 1.09 Billion Light years distance. The light captured here left IC 2729 over 900 million years before dinosaurs roamed the Earth. Cheers Nige.
  11. The lum channel was taken with a Canon clip in Ha filter. I layered this with the colour data in Star tools layers module.
  12. Hi Ed. With darks, I recommend a minimum of 22, but more is better. Warm weather always made the banding worse, and darks worked on a small % of images with the bands but not much. To be honest darks didn't do much for my DSLR images as temperature would fluctuate a lot, flats and bias did however but not with bands, Longer subs will make the banding worse unfortunately, but there's several processing options, Star tools has a good banding module which works well most of the time, and a photoshop plugin, Astronomy tools, pretty cheap and works in PhotoShop CR2 free version plus all the paid for versions. You shouldn't need to take bias every time you image, once a year I would make 50 new bias frames. Using narrow band filters did help, its the layering of different filtered images that reduced it quite well, but filters are not cheap and the money better saved for a camera upgrade if your heading that direction. It's rare that the banding couldn't be processed out, once you find a good method, it tends to work on most images. Heavy dithering helps also, as your moving the banding around a little on each sub. A meridian flip worked very well because the bands were flipped on some of the subs, stacking removed pretty much all bands, but that all depended on the target. Hope this helps in some way. Best regards Nige.
  13. Hey guys. Star tools is coming along good, with quite a few new tools. Has anyone tried the new 3D module in Star tools. It works very well with nebula, still trying to work out settings for galaxies atm. It's great for FB posts, also 3D glasses or viewing on web browser. Nige.
  14. Hi. The 130PDS is on the absolute limit for this mount so would need to be balanced perfectly. With a good polar alignment and balance you could possibly get 2 minutes. But 60s-90s should be doable at a fair keep rate. A refractor would be a better choice but quite a bit more expensive. Consider re greasing the gears if your handy at taking things apart. I did this with my EQ3 with a good improvement to smoothness of tracking. Good luck and most of all Clear skies.
  15. Thanks & Well spotted Olly. I had not taken flats for NGC891. The circular artefact is the secondary mirror reflection from my 200PDS, which is partly why the black point is clipped Cheers Nige.
  16. Sadly the weather has been pretty poor for astronomy and astrophotography, but I have made the most of what clear skies there has been. Working on my narrow band imaging and processing and my first LRGB image. I'm enjoying the new process, combining data, experimenting with data, personally finding processing easier than I had expected. First NGC 7000 SHO, 30x240s each filter. 80ED. Second the Heart nebula SHO, 3 panel mosaic, approx 1.5 hours each filter - each panel for around 14 hours. 80ED. Third the Monkey head nebula SHO, 30x240s each filter, 200PDS. Fourth NGC 891 LRGB, 15x240 each filter using artificial L from RGB. Several smaller galaxy's can be seen with NGC 891 ZWO ASI1600MC, sensor temp -10, 139 gain, ZWO 7nm filters & EFW. Thanks for looking.
  17. A short video of Mercury and the Sun late afternoon on the 11/11/19 Thanks for looking. Cloudy Mercury.mp4
  18. Clouds have stopped play for a while so I have been messing around with a little animation. M51 taken 1 image per century over a period of 250,000 years, bit of a long project . A bit of fun using pixaloop android app. Cheers Nige. 03_11_2019_22_29_14_3469999[1].mp4
  19. I now have a ZWO ASI1600 cooled mono and 7 position filter wheel. The day it came in the post we had a few of hours clear sky, the first for weeks. Very odd, to get a chance on the day of delivery ( been cloudy since ) First I had problems with APT and random horizontal lines, think its a usb problem, so have ordered a mains powered usb hub. ASICAP seemed to be ok though. After wasting a while sorting the problem I managed to capture 9x240 Ha 10x240 O3 & 7x340 S2 on the Elephant trunk, I used the Ha & O3 to construct a HOO image. Bare in mind, this image has no darks or flats added, just light frames. Looking forward to using this fine camera again Thanks for looking. Nige.
  20. Very nice M101 well done. I have been using APP for a while now, I stack and light pollution removal with APP then process with Star Tools. Sometimes polish with Photoshop express. Astro Pixel Processor was a big step forward from deep sky stacker for me and Star Tools works well with an APP stack. Star Tools 1.5 has some good new features, your computer probably struggled with Star tools with a full size image, bin 50% before starting processing and it will run twice as fast without loosing detail in the image. When you start star tools and open an image, on the left side with the tools is bin. If your happy with your chosen software, ignore the above Nige.
  21. This is a very good book, covering all area's of deep sky imaging. Perfect for starters. Nige.
  22. Excellent first attempt, great looking stars. Have you tried Star Tools ? great post stack processing software, unlimited free trial. https://www.startools.org/ Nige.
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