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A320Flyer

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About A320Flyer

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  1. I use an ASI1600 on a SW ED72 with the OVL FF and have the same issue. I have gradually increased the spacing and am currently at 58.5mm. Stars are much better now with only the very edge stars showing elongation. I have read elsewhere that the sweet spot is 60mm. The problem is that CCD Inspector reports the curvature getting worse but I see the stars getting better. Try increasing your spacing. Cheers Bill
  2. Hi, Would someone with this setup be able to advise on the optimum spacing distance they have in order to get round stars across the full frame of a ZWO ASI1600. I am having a bit of trouble dialling in the correct distance. I started at the quoted 55mm and gradually increased. I do see an improvement but am currently at 58.5mm and wonder how much further might be necessary. Thanks Bill
  3. Next clear night I'll make sure my guide scope is accurately aligned.
  4. When I play the images through PI Blink, there is a consistent movement from left to right (RA), no stutters, no discernible up/down movement. If PE was an issue, it would have "corrected" itself on each worm cycle. Dithering is random on both axes, so I would not have thought it would not have manifested itself as a consistent left/right movement. My PA is pretty good as there is very little drift on DEC. This particular target/imaging session was almost at Zenith, so I'm thinking DF would be minimal? I have my mount East-heavy as this gives me much better guiding RM
  5. Hi folks, I have noticed that there is a significant drift between the first and last images in an imaging session, even though I am guiding. I want to try an minimise this as much as possible. For background information, for this particular session, imaging setup was: ZWO ASI 1600 MM Pro, imaging through a SW ED72 on a HEQ5 Pro mount with belt mod. Guiding with a ZWO ASI 120mono via a SW 50ED Guide scope. Image acquistion via MaximDL6, guiding via MaximDL6 using EQMod Pulse Guiding. Guiding RMS was between 0.5 and 0.9 arcsec/px with a small dither of 1.0 pixels betwee
  6. SHO combination in PI, Ha as luminance, finished in PS. Bill
  7. This is something I posted on CN as a reply to a post. I thought I'd post here as well in case it is of use to someone. This a 3D-printed Camera Rotator I designed to fit my ZWO ASI1600 and ASI183 cameras. The metal plate is a 76x15mm frame cramp (available here in the UK for about 15p each) screwed to the face of the flat section using small self-tapping screws. To calibrate it (a one-time operation), attach it slightly loose to your camera (aligned roughly to either the long or short sides of the camera sensor), take an image, plate solve to find the angle, park your scope hor
  8. Here'my attempt. Processed mostly in PixInsight as SHO, with Ha as Luminance, then colour balance tweaked in Photoshop. Bill
  9. Internally, PI uses a Normalised Scale where 0 represents Black and 1 represents White. So, your value of 500 is represented by 0.008 on the Normalised Scale. $T is used to represent the pixel value of the active image. So, your formula should be written as iif($T<0.008,$T,1) Try that. Cheers Bill
  10. I just had to have another go at pulling out the Oiii Bill
  11. Here's my attempt using PixInsight. Custom HSO combination. Luminance stretched with HT. HDRMT and LHE to bring out the details in the background and foreground respectively. Combine Lum with SHO. Cheers Bill
  12. Here's my attempt using PixInsight. Basic SHO combination. Curves to shift the tones towards the Hubble Palette. SCNR to tone back the greens a little and to suppress the magenta stars (inverted image). Ha as Luminance, stretched with HT and stars blended from a Masked Stretched version. HDRMT and LHE to bring out the details in the background and foreground respectively (with suitable masks). Combine Lum with SHO. Image rotated and flipped to give conventional orientation of M16. Cheers Bill
  13. Hi This is interesting. I have a 6 year old HEQ5 that has never been updated and I am currently experiencing guiding issues that I can’t seem to solve with tweaking guide settings. The SW website list two firmware downloads that look as if they would apply to an HEQ5: Motor Controller Firmware Loader V1.74 and HEQ5 Go To Mount V2.04. Is it fairly straightforward to do the update? Do you need both downloads? Do you use the serial cable that came with the mount? I have an old winXP laptop that has a serial port. Will the update work under winXP? Thanks Bill
  14. Hi Dave Welcome to SGL. I’m a member at WYAS and, as previously mentioned, we are open Tuesdays and Fridays. We are a friendly and welcoming bunch with many doing visual observing and a small, but active, group of imagers. We do an astronomy beginners course on a Friday and I believe one is due to start in the next couple of weeks. I go most Tuesdays so if you do pop down, ask for me and I’ll introduce you around. Cheers Bill
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