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StuartJPP last won the day on December 18 2017

StuartJPP had the most liked content!

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5,233 Excellent

About StuartJPP

  • Rank
    Brown Dwarf

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  • Gender
  • Interests
    Birding and now a bit of astrophotography.
  • Location
    Leeds, UK
  1. If you look closely at the trail there are actually 3 flashes though only two are clearly visible (the 3rd not quite in the middle of the other two). I wonder if it is caused by patches of fog/mist lighting up the tail during the strobe flash? Though it can't be the aft strobe flash as that isn't visible.
  2. Thank you... A combination of PixInsight and PS6 was used to process it.
  3. Thank you... It is probably deep enough but the quality of the subs is not great. If I had the same integration time but with decent subs I'd probably call it a day. As it stands I threw a lot away and I also used a lot that I normally wouldn't have. Six to eight hours of good quality subs is probably where I'd like to be, at which point there would be almost no noise reduction of any sort required.
  4. Ever since I started using my Canon 6D I have wanted to get a decent amount of data on M31, a common target but one I wanted to do "once and for all". It hasn't always been my primary target over the years but at this time of year and where I usually image from it is in a prime location. Back in August 2017 I managed to get about 2 hours of data on it over 2 nights and this past weekend I thought to myself..."This is it, new moon, clear skies etc.". However it was not meant to be as by the time I had set up and it was dark enough on both Friday and Saturday evening the clouds started to roll in. I did manage to get some imaging done but nowhere near as much as I would have liked. So anyway, long story short...I would still like to capture some more decent quality subs on M31 to finally finish it off...when that will happen is unknown to me. Luckily I still have no intention of changing gear so it may be another decade before it is done. Baader modified Canon 6D Canon 500mm f/4 L IS @ f/4 Avalon Instruments M-Zero APT for image acquisition, plate solving and dithering PHD2 for guiding using QHY5L-II-M and QHY miniGuideScope DIY PoleMaster for polar alignment SQM value of 20.88 A total of 87x 5 minute subs at ISO800 of various quality (26th August 2017 and 18th & 19th of September 2020). Thanks for looking.........
  5. UK VAT was always to be added to the price before purchase, the same applies with all other countries.
  6. I doubt that it would be the LCD then. It can definitely be the viewfinder causing it, best cover it up for next time to see if it helps. If your darks aren't showing similar issues it will almost certainly be that.
  7. Was the rear LCD on at the time? I.e. was the LCD displaying the shutter timer during the exposure? I've seen a similar pattern on captured frames when the LCD of my 650D was on during some testing.
  8. I think what you have got there is the standard "C" mount with IR filter that was supplied with the early QHY5L-II cameras as well as a "CS" mount as well. The CS mounting is shorter and allows CS mount CCTV lenses and finderscopes with shorter focal point to be used. As far as I am aware the newer versions of the cameras are supplied with a CS mount as it is easier to attach a 5mm CS->C adapter/spacer if needed. Depending on what lens/scope you are attaching to the camera you may need one or the other to achieve infinity focus. My QHY5L-II camera also had a 1.25" extension tube supplied as well if needed (about 30mm long), though I haven't had to use it yet. If you are stuck you could ask Bern at Modern Astronomy, he's a really helpful chap.
  9. Unless you have a full spectrum modification you can also opt for the Astronimik CLS EOS XL (non-CCD version). My Canon 6D has both the front filter intact as well as a Baader filter replacement and as such I picked up an Astronomik CLS EOS XL filter for a bargain on ABS. To be honest I don't use it often as I almost always image from the in-laws whose LP is way, way less than where I live and I also image with the Canon 500mm f/4 L IS lens with which I use a Hutech IDAS 52mm filter in the filter drawer. It is worrying that the trend it to discontinue the full-frame filters.
  10. I know this is an old topic, but it does keep cropping up every now and then on here and other astronomy forums. On the Canon 500mm f/4 L IS lens that I have got the rear part of the barrel, just before the camera mount, is square not round, probably about a 3 or 4cm tube. Initially I thought that this was the cause of the vignetting and although it does play a tiny role at the extremities it doesn't appear to be part of this particular issue. I couldn't mentally picture where this "almond" shape of vignetting was coming from, so I put my lens to my eye and looked down the tube and moved it back and forth, to and fro. It was plain to see the almond shape that Mark and others identified as the source of the issue. The video below tries to capture the issue and as far as I can tell there would be no way to eliminate this issue other than by cropping. Head-on, i.e. in the centre of the sensor the image is circular but as the the light travels further away from the centre of the image circle the more they become distorted.
  11. That's a very nice home-made solar barbecue, but won't the pork sausages roll off onto the floor?
  12. I should have probably mentioned that I only opt for the Plus version as well which is very palatable at £6. Does everything that I need it to.
  13. Not sure if this will work for everyone but it did for me so thought I'd share: https://store.simulationcurriculum.com/products/skysafari-6-for-android-ios-macos#neowise
  14. Of course it is fine Ivor, anything to help out with the fight against light pollution. Some of the the biggest culprits are Leeds/Bradford airport and the Parkinson Building (Leeds University) which is always over-exposed. I'm sure there's many, many more. I'll PM you the location.
  15. 14 x 2.5 seconds @ 200mm on a Canon 5D Mark III. Over such a short period not only has the comet moved quite a bit in the frame (to be expected), but the noctilucent clouds have changed shape a fair bit, though not nearly as much as the regular clouds. No wonder stitched panoramas at long focal lengths are practically impossible!
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