Jump to content

Narrowband

Laurin Dave

Members
  • Posts

    1,503
  • Joined

  • Last visited

  • Days Won

    10

Everything posted by Laurin Dave

  1. With ASI1600 to get 55mm backfocus its flattener then 11mm and 16.5mm spacers FW then camera ie take the 11mm spacer off the front of the camera and connect camera direct to FW. There are diagrams on their website showing how its done. At the moment you have 65mm. Dave
  2. Canon lenses have 44mm backfocus and the distance from the front face of the camera to the sensor is 6.5mm so the camera adapter plus spacer should total 44-6.5mm i.e. 37.5mm to obtain focus. Have you measured it? Looks like the zwo diagram for the 183 is incorrect in that you do need to use the 11mm female to female spacer as it shows in the diagram for the 1600. For what it worth I have the 1600mono and filter wheel and the appropriate version for Nikon lenses and it focuses fine. Dave
  3. Surely Darkframe should have sorted that out as part of their Stellardrive mod. I'd get in contact with them and ask them to fix it. Dave
  4. Thanks Steve for your excellent write up, I shall add it to my copy of your Dark Art or Magic Bullet book which arrived yesterday .. I did notice that in this post Deconvolution now starts on page 51 rather than 45 as in the book.. What other gems are you working on? Dave
  5. Nice image Nigel, looks like you've got your star elongation sorted. What was the issue? Also wondered whether using your scope at native f7 might speed up image capture/ reduce noise. Dave
  6. Laurin Dave

    IMG_6784.JPG

    Pelican Nebula aka 'The Smiling Rabbit' ASI1600mm 5nm Ha, 20x5mins
  7. Laurin Dave

    IMG_7027.JPG

    Deneb area including North American and Pelican Nebulas. Not with the Esprit but a Nikon 70-300 zoom at 70mm. 26x5min 5nm Ha ASI1600mm
  8. Laurin Dave

    Esprit 150ED

    Images captured using my Esprit 150ED ASI1600MM camera on Skywatcher AZEQ-6 mount
  9. M27 the Dumbell Nebula. 30x120s RGB plus 17x 300s Ha and Oiii. Processed in Pixinsight and Photoshop. Ha and Oiii added to RGB using Pixinight NBRGB script.
  10. M27 the Dumbell Nebula. 17x300s Ha and Oiii with RGB stars. Processed in Pixinsight and Photoshop
  11. Fireworks Galaxy NGC6946. 50x120s LRGB plus 23x300s Ha. Processed in Pixinsight and Phtoshop, Ha added using Pixinsight NBRGBC script.
  12. Fireworks Galaxy NGC 6946. 50x120s LRGB. Processed in Pixinsight and Photoshop.
  13. Crescent Nebula NGC6888. 52x300s Ha, 42x300s Oiii (Astrodon 5nm) and 10x120s RGB for the stars. Processed in Pixinsight and Photoshop. Had a go at replacing the NB stars with RGB which seems to have worked on the larger stars.
  14. Hi Nigel, Nice image, I had a look at your data last night whilst waiting patiently for my power supply to fail as I imaged the Fireworks galaxy in Ha. To me Dynamic psf in Pixinsight seems to show that the minor elongation gets worse on the Red from top left to bottom right and on the Green and Blue in the opposite direction, also the Blue and Green are generally more elongated. Also when combining RGB and after background neutralisation there is a pronounced red to green gradient left to right... So these make me wonder whether you did a meridian flip between red and green/blue and whether you have balance and polar alignment/field rotation issues, I don't know whether you are using an OAG or guidescope or are on a on a permanent pier. Hope this helps Dave
  15. Laurin Dave

    Esprit 150ED

×
×
  • 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.