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ampleamp

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ampleamp last won the day on November 16 2014

ampleamp had the most liked content!

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About ampleamp

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    Shropshire
  1. Thank you for the comments. I will keep trying to improve.
  2. First post in a while due to silly amount of work this spring (frequently coinciding with the rare clear nights) and re-jigging my scopes/obs into a dual system The last two evenings have been clear so despite the half moon i decided to image a familiar target - M51 Whirlpool Galaxy. I have had many scores of subs sorting alignment and flexure issues but i think i am finally getting there now. This is LRGB only as SGP made a total mess of the focus in my Ha channel and i haven't worked that one out yet. Due to the half hour of astro darkness and even with 3' and 5' subs the flats had a lot of work to do; if you look closely you will see they were only just adequate for the job. Enough preamble; thanks for looking
  3. Peter Rejto describes very well some of the challenges of a really good dual system and will undoubtedly have given you some great ideas. Olly has given some sound advice on the practical aspects of long and short focal lengths, mirrors, and don't under-estimate how soon the lower scope starts imaging the wall. Things to also consider no matter what system you may put together include - do the scopes point at the same place in the sky; depending on chip size, even at medium focal lengths on a standard dual plate they probably won't so you will need to use shims (tedious) or an alt.az adjuster (weight capacity) to achieve this differential flexure will not be your friend and you may well need a good mechanical solution and even then... cable management - there will be a lot of them! timing of subs if you use dithering balance cost, £ and time a doubling of systems imo equals at least a quadrupling of all issues, do you intend to be present for all these? I am putting a dual 1200mm system together and am working through all of the above, and more, but I have some very personal reasons for embarking on this and i will make it work ;-). Good luck!
  4. If SX are willing to do the cleaning, then go for it. I have sent a couple of cameras to them in the past and their service side is excellent. Obviously make sure you package everything up really well but barring any postage/courier issues, there should be no problems.
  5. Thanks. I’m not on my normal calibrated machine so entirely possible. On this laptop I found that dropping the background lost much of the faint background signal but I take the point.
  6. I am told home has fabulous skies right now, and I don't sat here, so here are four images taken over the last few months from ICA in Spain using @Petergoodhew 's TMB152/1200 and QSI6120. All these were chosen as they aren't imaged that much and partly because they gave different challenges and gave me a chance to try different techniques; and I quite like them ;-). I am interested in any c&c that anyone might have, too much processing, too little... Always keen to learn a bit more. Sh2-112 - 27 x 900" Ha and 12 each of 300" RGB. Is a really bright object in Ha that to my mind resembles the PacMan to an extent. This was taken in September and is about 5600LY away in Cepheus. Apparently this also responds well to O111 an d S11. NGC7538 - 32 x 1200" Ha, 33 x 1200" O111 and 27 x 1200" S11. Also located in Cepheus, but is approximately twice the distance of 2-112. I have tried to keep this toned down as all the channels came through very strongly. This was also taken in September. IC5076 - also known as vdB 137. 10 x 600" L, 23 each of 300" RGB. This reflection nebula has come across as being very faint so perhaps one to return to get more subs?. Certainly the ones i compared to online were either stacks ore subs or from much larger scopes, or both ;-). Located in Cygnus near the NAN. I think this is like a faint bird flying away (?). IC10 - 14 x 600" L, 14 x 300" R, 20 x 300" G, 20 x 300" B, 17 x 900" Ha. An irregular galaxy located in Cassiopeia approx 2.2MLY away. Diffuse and difficult would be my summation of this ;-). Taken back in July. Thanks for looking
  7. Have always liked this part of the sky and never tried it wide like this. Excellent as always Richard. ??
  8. Since you use Pixinisght, it might be worthwhile trying the use of HDR Multiscale Transformation to open the core a touch. It is very easy to overdo it so care is needed to prevent some (IMO) terrible results. I find 8 layers generally works best for me but I experiment through the range every time. Also the dark structure enhance script might work well for you; I usually blur two layers but again, experiment on your own data. Just remembered about your magenta comment. It is always worthwhile trying this. Invert the image, run SCNR in green (often around 0.9) and then reinvert the image back to normal. Invertion turns the magenta into green which is then removed by scnr. The trick is what happens when you reinvert and how does everything look? If it works, happy days. If it doesn’t, there are various magenta strings for Pixelmath to try.
  9. Well framed and nice image. I am looking from a phone so not the best to judge colours, but is there quite a bit of green in the background? Did you try any deconvolution?
  10. Thank you everyone ?? Most of the luminanace was from a Tak100DF and Atik16200 while the remainder Lum and all the rgb was from an FSQ85 and Atik383. I used reducers in both systems. I did try and fiddle around with saturation but kept coming back to this version as the stars started to suffer.
  11. Being one of the most photographed objects in the sky I don't even pretend to offer anything new barring this is my second go at this galaxy as it was my first ever DSO attempt. I have deliberately kept this as LRGB and tried to maintain the dusty nature of the galaxy, and i wasn't inclined to turn my cameras around hence the acute angle; if i had been braver i would have rotated to the corners. L - 37x600s + 39x900s; RGB - each 18x600s, taken with my multi widefield setup on 12/13th and 15th September when we got two fantastically clear nights followed early morning with driving rain; i was too late the first morning and got rained out Thanks for looking.
  12. You completed ?. I think you have a done a great job on that outer shell - a fainter aspect of a faint object! - and i am intrigued to see the LRGB as I haven't touched that yet. Excellent work
  13. @Barry-Wilson posted an excellent view and description of an area in Cygnus - - which contained an elusive Planetary Nebula called PK 086+05.1 (or We 1-10). In some communication with @Petergoodhew on Astrobin, Barry suggested we turn our 152/1200 on this PN. Well we did and this is my version of this very faint object. This image is a combination of subs from Shropshire (my 152/1200 and SX H694) and remotely from ICA in Spain (Pete's 152/1200 and QSI6120). Peter will post his version but i have used 21.5 hours Ha (1 bin) and 22 hours O111(2 bin). The Spanish data also includes LRGB in addition and i intend to combine that data into this but have run out of computer time for a couple of weeks. Amazingly, there is a lot more Shropshire data than Spanish in this version with nearly all the O111 and half the Ha coming from home. My other project these last couple of weeks has been a wider view of Sh2-129, The Flying Bat Nebula and within this i decided to try for OU4, or The Squid Nebula. Initially this was going to be a conventional HaRGB but this ended up a serious challenge as 2x2 O111 frames of 20 minutes barely showed a thing. In the end i used 19.25 hours of Ha (900" frames) and 35.5 hours of O111 (900" and 1200" frames), all frames from Shropshire. I have the rgb but haven't used it here yet. I can understand why this was undiscovered until 7 years ago; a seriously faint object ? I have added the inverse of the O111 data for interest (edit - this is the integration stack!) As always I am looking for any critique and suggestions as to how to improve processing. Thanks for looking
  14. Thanks Alan, that RGB "blip" removal technique is highly worthwhile add - ahem, and the one on DBE, I thought i understood that aspect....
  15. It’s always @ollypenrice‘s fault ?
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