Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_30_second_exp_2_winners.thumb.jpg.b5430b40547c40d344fd4493776ab99f.jpg

michael8554

Members
  • Content Count

    2,554
  • Joined

  • Last visited

Community Reputation

899 Excellent

1 Follower

About michael8554

  • Rank
    Brown Dwarf
  1. I replied to you twice in your original post........ I won't bother again. Michael
  2. Those aren't star constellations in the image, they're Starlink constellations....... Michael
  3. I see the RA and Dec neg Dithers but don't see the PHD2 pulses that caused the Dither.? Then the huge pos pulses that cause the correct correction in Dec, but overshoot in RA. Do you have some sort of RA Backlash Comp set on the mount? Then Dec settles in about 15 secs, which is less than your 30 sec settle time, but PHD2 is immediately reporting settle failed? I think you'll have to post your PHD2 Guide log, including a Calibration. Michael
  4. Very little info there - for a start you could enable the PHD2 corrections in the display, and zoom in on the X /RA axis to only show either side of just one of the Dithers. Or you could simply set the Settle Duration or Exposure Delay to a larger figure ! Michael
  5. From the PHD2 Forum (edit - might have been the LX200GPS Forum) : 0.2 x Guide Pixel Size(microns) x Imager Focal Length (mm) Divided by Imager Pixel Size (microns) In my case,: 0.2 x 3.75 x 1280 Divided by 4.7 = 204mm I use a 200mm Telephoto Lens. Assumption is that PHD2 can measure Centroid to 0.2 of a pixel, a conservative assumption. This happens to be a ratio in arcsecs/pixel of 1.05 to 3.87. Michael
  6. You should start another post for the mount issue or you won't attract the relevant views. Michael
  7. Daytime on an artificial star gave me an approximate setting I further tweaked on stars. Focus with the artificial star in the middle of frame and then move to near a corner. Michael
  8. The daytime focus on a distant object will get you close to infinity focus, so you will need to fine tune on stars. Use the View/Star Profile screen to set HFD to the lowest figure while you adjust focus. Michael
  9. Is this screenshot with the scope pointing at stars, or just indoors? Did you try shining a torch into the scope? If that works then probably way out of focus. Try during the day pointing at a distant object with the exposure very fast, say 0.1 secs, because the camera will overexpose on a 1 sec exposure. Michael
  10. If you briefly shine your torch into the guidescope you should see a white frame if it's working. Michael
  11. The display in PHD2 is not optimised in the same way as imaging software would, so always looks grainy, but should show stars. Have you hit the Loop Exposures button on the bottom bar? Have you set exposure to between 1 and 3 seconds? Have you adjusted the display brightness to the left of the brain icon? Might be worth showing a screen grab - the Prt Scrn button on your keyboard top row will save to the clipboard. Michael
  12. I have a Meade so don't understand the subtleties of setting up an EQ mount. But I think the mount will have lost all knowledge of where it was when you got the premature power down. So IMO you can only return the mount to the Home Position, switch on, Synch on the moon, then a star near your target, then Goto your target and start maging! Michael
  13. If I've correctly entered your ED80 and 314L correctly into my planetarium, then the moon fits nicely in your FOV ?? You ought to be able to "find" the moon by initially sighting along the OTA, then hand panning to find and centre it on the camera display. Then Synch. Now I assume it should then return to the home position when you request it ? If not I guess you will have to switch on in the Home position, slew with the handset to the moon as above, and Synch. I can understand that finding stars to Synch on can be tricky with a smallish chip, which is why an accurately aligned finder is essential to get you close IMO. For example, the three stars of Orion's Belt should be obvious in a finder, you can then centre on say Alnitak, confirm on the camera, and Synch. Michael
  14. The USB to Serial part is just what it says, it's not particular to Meade, or Losmandy, or any other brand. With the correct cable for your mount attached, it can be used to update the firmware, or with a different cable, to control the mount from a PC. USB to Serial Converters can be frustrating to set up, depending on which chip is inside, and which Windows version - some will load the drivers and work straight off, others need much fiddling. Michael
  15. You seem to have good PA and not much Dec Backlash, so Dec should hardly need guiding at all - try balancing slightly heavy in one Dec direction, upping the MinMo to 0.3 or 0.4, and see if you get a straight Dec line ! The PPEC seems to work well with your mount, but be aware it has to go through a couple of worm cycles each night to learn the Periodic Error, so don't start imaging until it been chugging along for say 10 minutes. Finally I would say 3 secs exposure is too long, come back to 2 secs to allow PHD2 to catch the RA drift more quickly. Michael
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.