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Whistlin Bob

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About Whistlin Bob

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    Proto Star

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    Burton upon Trent

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  1. Effort 2 from me. Mostly the same process, but I always find with this really strong data that the temptation is to make the Sii and Oiii more dominant than they are (and why not- half the time I barely even get an Oiii or Sii signal at home!), so I tried a stronger mix of the Ha into the Red channel to make it a bit more stronger.
  2. Effort 1 from me- Masked Stretch on each channel. Starnet, then switch to GIMP for a bit of layered blurring around Navi to soften some of the star removal artefacts. Pixelmath to combined in HSO, with O boosted x2 in it's own channel and subtracted from the signal in the other 2 to make it stand out more. Bit of Local Histogram Equalisation to bring out some of the texture in the nebula. Then, for the stars, back to the original channels and another masked stretch, but with background set to 0.05 and combined HSO. Then combine the stars back in using a formula
  3. Thought I'd post a little well done (with a bit of envy!) to everyone who has seen it. I tried for ages on Wednesday night in my 8 inch dob. Tried 150x, 175x and a slightly silly 300x but no dice. Rigel and e/f in the trapezium were all quite easy, so it was definitely the night for it, but couldn't get Sirius b. It was my only miss of the session though- lots of lovely views of other winter treats, so not so bad really!
  4. I made the most of a short clear spell last Wednesday. This is the Crab Nebula- the first object in Messier’s catalogue. I captured it with my ASI 1600mm and 8 inch Newtonian – its first use since last September- with 30 minutes of RGB on the stars and then half an hour each on Ha and Oiii. Not really enough, but there was intermittent cloud throughout the evening and I rejected more of the narrowband subs than I kept. I’m really fond of this object for several reasons: I love its place in history, with clear records in China in 1054 observing the actual supernova, it’s a good observing c
  5. Must agree with the previous posters- although you can just about get away with a 200 for imaging in an heq5. I have mine in a converted shed which protects it from the wind and I can usually guide at 0.7-0.9" RMS. It's not ideal, but I do think the extra aperture helps with fainter targets.
  6. What a wonderful gesture. Macmillan were fantastic for my family when we really needed them- I wish you all the very best with this sale.
  7. Another vote for Rigel and RACI. You're right about the bit of polystyrene and the collimation cap as well. It does frustrate me that Skywatcher miss these easy open goals that make this telescope so much better for relatively minimal cost. I've had mine for getting on for six years now. It was my first proper scope, but having owned quite a few others now I really appreciate just how good it is.
  8. @Ibbo! and @CCD-Freak those have both come out quite funky!
  9. A tipsy dither. We have an Astro-imaging sub-group at our local club, and at the last meeting @Stub Mandrel suggested sharing bloopers, and I was thinking afterwards that it was a good idea- so here’s my submission… Sods law dictated that the only clear night in weeks should coincide with a pre-arranged zoom drinks and quiz night with some local dads. I thought that at least I could get some imaging done whilst it was on. Trouble is, to avoid walking noise on my Star Adventurer, I have to manually dither the mount. Three rounds in, before my turn to be question master, I suggest
  10. Wonderful report- really enjoyed reading it- also gave me a strong longing for my 14" to come out for the first time since November. There's a few favourites in your list I haven't seen yet this season- especially m1. The HH is an odd one. An Hb filter is very helpful for it, and UHC helps too. I had a pretty clear sight in Cumbria once, and some very marginal views at home. It's a funny object because, as John says, it's more darkness in a nebula bank that you're looking for than anything else.
  11. Nice- I've found that to be a tricky target.
  12. It's pros and cons- a good prime eyepiece will beat a good zoom, but a zoom wins hands down for convenience. My most used eyepieces are the Baader zoom, OVL Aero 30mm and Celestron 7mm. I use the zoom most of the time, it's great for zooming out, finding your target and then finding the right magnification. I use the 30mm for large targets (eg the veil, m31, the Pleiades) and the 7mm for close in work (the moon, planets and planetary nebulae). The improvement from the zoom at 8mm to the prime at 7mm is marginal, but it is there. The zoom will magnify by 150x which gives you a lot of detail. Th
  13. That's very similar to my setup and I'm very happy with it. If you order the 200p, you can keep an eye on the 2nd hand market and if one comes up in the meantime you can cancel and save yourself both a wait and some money. Most astronomers seem to take good care of their gear and a Dob is a very simple piece of equipment: there really isn't much to go wrong if the mirrors are ok. I also use the Baader zoom and find it excellent, although as @Pixies points out the Hyperflex is a fair bit cheaper and seems to be very well thought of (I haven't any experience of it myself). The other
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