Jump to content

Banner.jpg.b83b14cd4142fe10848741bb2a14c66b.jpg

Roy Foreman

Members
  • Posts

    717
  • Joined

  • Last visited

  • Days Won

    1

Posts posted by Roy Foreman

  1. 8 hours ago, The Lazy Astronomer said:

    Your title was somewhat off putting! 😅

    I'm still not convinced you don't have some kind of localised weather control, because I've not seen a star for weeks!!

    I haven't had skies clear enough for imaging in 3 months !  Its getting beyond a joke.

    • Sad 1
  2. This is part of my ongoing quest to image the outer shells of M27 given my limited clear skies.  Still room for improvement I think but this is my best effort so far.  Those with better processing skills than I could probably make a better job of it.

    I'm also doing the same for M57, but that's in the pipeline.

    Taken over two nights - 15th July and 18th Sept - using my 16" Reflector and ASI 6200 MC Pro.

    66 x 60 sec at gain 400 with an IDAS NB1 filter.

    Processed in DSS and Photoshop.

    Thanks for looking.

     

    M27 602 NB1 2022-09-18+07-15.jpg

    • Like 13
    • Thanks 1
  3. My cooled astro camera is playing up, so when a rare clear night occurred recently I reverted to imaging with my trusty Nikon D810a - an amazing camera that is so much more than just a stock DSLR with a modified filter.

    Image details are as follows :-

     

    North America Nebula

    Stella Mira 90 EDT at f/4.8 - 20 x 30 sec at ISO 6400 plus IDAS NB1 Tri Band Filter

     

    Dumbell Nebula

    16" Reflector at F/4.5 - 20 x 45 sec at ISO 1600, no filters

     

    Ring Nebula

    16" Reflector at F/4.5 - 20 x 30 sec at ISO 1600, no filters

     

    For what its worth, I've imaged all of these objects with my ASI 6200 MC with total exposure times four times longer than these, but results hardly any better. Can't explain why, but food for thought.

    Hope these are of interest, especially to those who are imaging with a DSLR.

    USA 30s ss 2022-08-25.jpg

    M27 45s 2022-08-25.jpg

    M57 30s 2022-08-25.jpg

    • Like 6
  4. 38 minutes ago, Zeta Reticulan said:

    You're welcome. Apparently, due to libration and nutation, you can never see the Moon exactly the same twice. Unless you live over 186 years or something lol.

    Ha ha didnt know that. If I did manage to live to be 186 I would probably have forgotten the views from the first time around!

    • Like 1
  5. It's not really the best time of year for chasing slim lunar crescents, but what the heck I gave it a go.

    Taken at around 6.15pm, so in broad daylight, I could not see the moon with the naked eye, even when I knew where it was.  But with a Pro Planet 642 filter fitted it was visible for imaging, although contrast was very low.

    This is a three frame mosaic taken with the 16" Reflector - 20% of 2000 frames at 19 fps and 2.5ms integration.

    Processing was really tough and I didn't think I would be able to produce anything presentable, but here it is.

    Thanks for looking.

     

     

    Moon 2022-07-31.jpg

    • Like 13
  6. 8 hours ago, Skyline said:

    The fov is very close to a 130pds, nice images BTW.

    Thank you.  I'm hoping for a clearer night where I can take the time to really do it justice.  Forgot to mention in the details that I used an IDAS NB1 nebular filter which must cut out some of the light, but at F/3.4 there are still lots of photons coming through !

  7. I was originally enticed by the Sharpstar 150 f/2.8, looks great but I was put off by reports of floppy mirrors and collimation issues.  Then I looked at Takahashi Epsilon 160.  Guaranteed quality but silly money.  So I opted for Skywatcher's new Quattro 150p.  I already have the 10" version which performs well, especially with the dedicated F/4 coma corrector.  Couldn't find any reviews of the Q 150p, so it was a bit of a leap of faith.

    The Q150p is typical SW build quality and, like all my other SW scopes, is well put together and has no mechanical or optical issues. It arrived almost perfectly collimated - just a tweak to the secondary required.

    These are first light results for the benefit of those who are also considering this imaging scope.  A bit rough and ready as I only had a one hour window between darkness and clouds rolling in.

    First off - the Cygnus Wall, using the coma corrector that comes with the scope.  This is just 2 x 60 sec at F/3.4 with an ASI 294MC at gain 300.  No flats or darks, and no guiding so star images are not brilliant.

    Second is the Sadr region, using SW's F/4 coma corrector and a full frame D810a DSLR.  5 x 15 sec at ISO 6400 unguided.

    I'm sure the scope could do better given more subs and autoguiding, but I was pushed for time.

    Hope these are useful for anyone interested in this scope.

     

     

    USA Wall 60s 2022-07-29.jpg

    Sadr 600mm 15s 2022-07-29.jpg

    • Like 7
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.