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  2. Hi. A cheap wratten #8 takes care of most of the blue without altering the rest of the colour too much. This is with a €100 ar80. Worth a go? HTH
  3. Some speculation about it here: https://www.cloudynights.com/topic/655834-anyone-know-anything-about-this-notional-new-16-bit-adc-zwo-cam/ but nothing much concrete. Sounds like it's still relatively early in the development stage. James
  4. Hi Neil @Coastliner Just wondering if youd had a successful resolution? I'm thinking of getting either an AZ-EQ5 Pier mount tripod, or an EQM-35 ... main drivers being portability and ability to store things/carry equipment up and down stairs , but worried about the wobble if using, say, an EdgeHD 8. Best wishes Sanj
  5. How does it look from the back? (Mirror slits are normally back surfaced so you dont get ghost spectra from internal reflections reflected into the spectrograph) Cheers Robin
  6. I think you'll end up chasing your tail. I'd just stick with the Newt till a good apo turned up. Olly
  7. Thanks for this tip Olly. I've always just tried to align them as central as possible as the foot of each channel is rarely the same width in my images. I will have a go with this next time round.
  8. I just stumbled on this camera being advertised on the OPT site and they take pre orders. When I googled it I see that OPT may have indicated a price of 5000 USD at some point (see attached screen dump) but on the OPT site no price is now given. https://optcorp.com/products/zwo-asi6200mm-p Do anyone know anything more about this camera? Seems like the one many have waited for.....
  9. Can anyone tell me where I can download a "Strip down" or repair manual or instructions for this Mount, I have a knocking noise on slewing and need to inspect it
  10. Today
  11. Bach to achro RGB-filtered imaging... I understand that blue would be an issue because of the violet component, but what about a blue filter stacked with a minus violet filter? Where there is a will there is a way! As for luminance, ditch the luminance and spend that time gathering more RGB? If you are imaging with a cheap achro, you are clearly prepared to make compromises...
  12. Somewhere in a cupboard somewhere I think I have an ex-Olly Atik 16ic(?). That must be getting quite "vintage" by now :) James
  13. Stumbled across this thread via a Facebook share, will be doing this over summer, odd thing is I live in Todmorden!
  14. I normally get around 0.7 rms while guiding after only using the polar scope of the az-eq6 for alignment, and I'm by no means experienced in this department. I use an app to tell me where to posistion polaris on the scope. Not sure what that would translate to for exposures unguided though.
  15. Very nice image. This is an Ha dominated target so getting it so clear from OSC is good going. CCD cameras haven't changed much. My own favourite one uses technology available more than 10 years ago. Olly
  16. Polemaster is good but when you move over to a guided setup sharpcap gives exactly the same results for £10. really hard to justify the cost when for the same money you can get a cheap guide setup that is much more useful.
  17. I think Olly is right in saying that there is nothing wrong with a well collimated Newton, and it is likely to outperform an achromat. Have a look at what Jens Zippel produces with his 10" Newton (and a 6" Newton would not be very far behind in the right hands). He gets a Top Pick or Image of the Day recognition for every second image he posts on Astrobin: https://www.astrobin.com/users/Jedi2014/ I think a good idea would be to stick to your Newton until you saved up for an apo, if you decide you really want a refractor. Buying an achromat now would make it take longer to save up for an apo.
  18. All a bit quite again, lovely looking disc though.
  19. Hi welcome to SGL from Peter in Bedfordshire
  20. Do a Drift Align by Robert Vice (DARV) using the DSLR. That'll sort out your Polar Alignment error.
  21. Great stuff Ed. This one has been my nemesis for a few years! I seem to remember seeing it once before, possibly in Gavin's TEC160, not sure. I'm reckon John's seeing must be better than mine, as I've tried and failed on numerous occasions with my Tak, and other larger scopes in the past. I do now have an Orion Optics 8" f8, 1/10th wave, so given your success with your VX8L, it seems possible I will have some luck with it. Thanks for the report.
  22. There is nothing wrong with a well collimated Newt, though... An apo will probably make life easier and lose diffraction spikes but it won't necessarily produce a better image. Olly
  23. Agree, especially where children are involved. For some reason there's always one of two small boys (for it is normally boys!) who insist on grabbing the eyepiece or sticking their finder on the eye lens. Partly because they get so excited, which is a good thing. Easily cleaned, of course.
  24. A very steep learning curve if you ask me. I'm still getting to grips with it. I think it's superb and probably nothing it doesn't do (except make the tea) well worth the money IMO.
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