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About GlassWalker

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    Swindon, UK

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  1. Thanks. I'm not having fun trying to pick the tail out of the noise from light pollution and think there is scope for others in better locations to do better. Haven't gone through all the other pics yet, but there must be better tails out there! Certainly based on deep sky images by others this should be a relatively easy target, tail and all.
  2. The CCD version cuts out the infra-red region whereas the normal one doesn't. I'm not familiar with what exactly the mod you're referring to does. If you're at all likely to get more IR then get the CCD version. As a side note, I got the non-CCD version myself early on. Then when I did get a full spectrum mod done, I had to rebuy the CCD version... it costs a bit more, but I could have saved myself a little effort there if I went straight to the CCD version. Other than the little extra cost, I'm not aware of any negatives to getting the CCD version regardless.
  3. Equipment: Canon 7D2, ISO1600, Sigma 150mm f/2.8 macro at f/2.8, Astronomik CLS CCD filter, 161 x 30s exposures. Took more but rejected a load due to cloud. Tracking background stars unguided with lousy polar alignment. Processing: Starting with PixInsight, flats, star align, comet align, stack, stretch, DBE, curves, photoshop. Above is only a comet aligned stack. I've tried to optimise viewing for the tail in this image.
  4. GlassWalker


  5. Collimation on a refractor could give funky colours, couldn't it? I did wonder if I was *that* good I could make a mirror system do it too! Well, it does have the corrector plate... Had a very quick play, seems to work, but I can't remember which was the "best" output of various attempted I had last night so use it on...
  6. Dispersion! Why didn't I think of that. I assumed I did a "could do better" job of the collimation, or perhaps the optical chain wasn't as straight as it could be. Mars was low down, but Jupiter was higher up and still affected though. I've not tried that function in Registax before, so will have a play with that later.
  7. - First time doing planetary in... a very long time. I kinda gave up a year ago when I realised my SCT was out of collimation. Adjusting it with the standard screws wasn't fun, so I replaced them with Bob's Knobs. And there it sat, uncollimated until tonight. Well, it still isn't properly collimated, just a bit less so with a rough 5 minute fiddle. Anyway, the Mars shot was taken with an old 8" Meade SCT, and the Jupiter was me playing with the Tal 125 RS to see how that compares. Both with a Bresser SA-barlow 3x and DFK21AU618. Preprocessing with PIPP as for some reason files from my Win8
  8. Ooh, I had forgotten about this. I'm slacking again... Metalwork has never been a strong point for me so making the drop in filter assembly is something I'm not looking forward to. I'm out of budget for the moment so no BF upgrade will be on the radar any time soon. I'm not much a visual user anyway, so hopefully its limitations can be worked around for imaging.
  9. Nothing visible from Swindon as for 10 minutes ago. Admittedly I only found out from the BBC news post and stuck my head out of the NNW window of the house. Just a few stars trying to make their way through the light pollution. Tried a camera quickly, picked up two faint clouds I couldn't see by eye and that's it. Too close to bed time to venture further out now.
  10. I didn't know that about the BF, every little helps! Taken to an extreme, why not make a new square holder for it? I'll have to pull my spare PST apart now and have a look...
  11. Back to the original topic (my feeble attempts at PST modding), to recap I have the TAL 100RS although yet to be unpacked. Also received the 75mm D-ERF which is a depressingly small piece of glass for the cost. I know it's high precision and all that, but still... then again, per area, I'm sure other astronomical filters I have cost even more. The outstanding item is the filter holder, which is ordered and hopefully arriving some time next week. Sky looks surprisingly clear at moment. If I can find the solar film I made up previously I might test out the TAL in white light and get some practic
  12. I know the BF will be a limit factor also, but since I have two PST I got a stock one for the wider image, and can use the mod to pick off interesting details. A bigger BF would make sense, apart from the high cost I seem to recall they demand.
  13. Scope arrived today, although it is still in its box. D-ERF is still on target to arrive tomorrow. I wont be working on the scope at weekend anyway since tools are at work! Anyone used the Thorlab holder before? Debating if the spanner wrench is required since it is double the price of the holder, or could I bodge it with other random bits as a one off job? I assume there's a screw in ring that holds the filter in place? I'm also wondering if the spanner wrench may be handy for other uses in future, but chances are it'll be so rare it isn't worth it.
  14. Thanks, will order that in the morning. The D-ERF has shipped and due Friday! It might overtake the scope in that case as I'm not expecting that until Monday.
  15. Filter ordered. Postage was a bit more than I thought earlier, but I guess as I wasn't signed in that was probably german postage, not to UK. Sill going to be cheaper anyway. I'm having search fail looking for a filter holder of some kind though...
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