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Martin-Devon

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Everything posted by Martin-Devon

  1. Rob, that's a stunning image - the tadpoles & flame star are wonderfully clear. Martin
  2. Nice image Barry, the HaRGB especially, you have a really good blend of star colour and detail in the nebulosity. Martin
  3. Ray, I use my 106ED almost permanently with the reducer in place. The wider FOV and faster F ratio are big advantages. Mine is mated to a QSI690 and Ian King supplied a custom made spacer that gives the perfect spacing. I did have tilt in my imaging train initially and had to mess around a lot with the grub screws in the reducer to eliminate; once done though it seems stable. The focus is razor sharp at this F ratio (3.6) so Focusmax or similar is preferred, coupled to a motorized focuser ( I use a Lakeside). I do get temperature shift with temperature drop, but once the temperature settles it's very stable. For narrowband filters I do repeat focus runs on the nearest magnitude 5 star using CCD Commander + Focusmax. Martin
  4. Yep, this image has lovely detail in it, not seen it in this pink-ish hue before, but it works. Try colour noise reduction in Photoshop @ 100% to minimize the blue halos around some of the stars. Martin
  5. Merry Christmas Paddy. That's a really nice image for the festive season. The tadpoles are nicely defined and I really like the contrast and colours in the central region of the image. Good tip also about the calibrated monitors, no doubt I'll have to address this as well soon since I have no idea whether the colours on my laptop screen are representative or not. Martin
  6. Nice to see you have the reducer sorted out on the Tak, looks lovely and flat to the edges. Lots of nice detail shining through as well, especially the red H-alpha globules in the dust lanes. Martin
  7. Your hard work has paid off very well Paddy - this is a really nice version of the Crescent.
  8. Yes that's a really nice image, not seen this colour palette before either for this target.
  9. I have a QSI 690, and my darks look virtually the same as what Steve has posted above, with just a few hot pixels around. Martin
  10. The image looks largely OK to me, if there are still some tiny eggy stars in the left corner it's not possible either to say categorically that these are caused by the reducer since the spacing to the CCD is also critical at this F ratio. I've also had issues with these exact same grub screws though on my Tak reducer, with tilt being introduced into my imaging train. In an earlier version of my set-up I had limited ability to rotate my imaging train via the capstan on the focuser due to the guide scope being in the way and I resorted to undoing these grub screws and thus rotating my CCD - what a mistake that turned out to be - tilt everywhere. I now have an OAG, so have removed the guide scope and can rotate 360 degrees now with the focuser. Still took me ages to get rid of the tilt though, but I think it's now gone and I swear I'll never touch those grub screws ever again. I used CCD Inspector a lot as well to guide me on the tilt, and where it was - this helped a lot.
  11. Very nice Phil, for a 2 pane mosaic you've got a lovely widefield there (what scope are you using?). It took me 4 panels to get slightly less with my kit. Once this Moon goes down, and you can add OIII/SII, this is going to be a cracker.
  12. A lot of dedication has gone into this, and you have a super image as a result - great piece of work.
  13. Ray - I'm pretty certain this is a thin film of condensation. I've had the same with my QSI/Tak set-up, it's an issue with these very humid cold nights as the temperature drops. I kept getting a film, almost identical to what you have, on the reducer (always on the glass side facing the CCD). The QSI cooler is very efficient/fast, so I've now taken to reducing the CCD temperature down to -20 in steps, so that it takes 30-45 minutes to get there. This slower cooling rate seems to have solved my problems. Maybe give this a try. Martin
  14. Looking good Phil, considering the moonlight last night you've done really well here. The mosaic has stitched together well, and you'll find them a little addictive as you see further widefield options forever coming up. Keep a check on the gradients though across the panels, especially when moonlight is around. Martin
  15. Thanks again for all the comments and feedback. I had tried the entire IC1396 last year as a 4 pane mosaic and failed miserably with it, gradients galore, so stuck to the simple stuff with this one. Sucker for punishment though, I'm at the early stages of a 9 pane marathon at the moment and if the weather picks up, there a chance it may be finished during February! Martin
  16. This is looking nice Francis, that RC8 is delivering the goods for you.
  17. Yes, this is very well framed, and a good example of this target - nicely done. Martin
  18. Agreed, it's nicely processed and very effective - clusters are difficult to handle here.
  19. Indeed, that's a lovely image Francis, it's not often we see the horsehead so close up and detailed. Martin
  20. Looks very nice Carole, especially the colour version - maybe have a look at reducing the blue halo's, perhaps by star reducing the blue stars since these often bloat a little. Martin
  21. Many thanks for comments & feedback - much appreciated. I was planning to add SII data to this image to make the full Hubble palette, but the weather had other plans. Not sure that the SII adds anything overly significant though, fortunately there's plenty of colour blends possible with just H-alpha and OIII for this target. Martin
  22. Lovely image Pete, the light tones behind the pillars really sets them off superbly. Martin
  23. Fairly quick data acquisition of 16x10min H-alpha and 15x10 min OIII, taken late October and early November. Processed as HOO = RGB in Hubble palette format. Most of November written off with poor weather, so this is going to have to be the finished version for this image. Thanks for looking, Martin
  24. Nice image Barry, and an impressive 10 hours of data as well. Those 10 minute subs have paid off well, the depth is definitely there. As Gav has mentioned the stars do have a slight blue halo, but overall the processing is excellent.
  25. Super image Paddy, rich in depth and well processed - lovely work. Martin
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