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.


  • Content Count

  • Joined

  • Last visited

Community Reputation

19 Good


About hot_ice

  • Rank

Profile Information

  • Gender
    Not Telling
  • Location
    Kent England
  1. Here is the pic without having to downlaod
  2. hot_ice

    ATIK314 CCD Mono

    Taken this Autumn Winter 2013
  3. It is getting nearer. The comet was taken at 6 am yesterday morning ison151103.tif
  4. Managed to capture ISON using a C11 on early Wednesday morning.It still look intact but hopefully will survive as it approaches the Sun
  5. Thanks for all the replies so far. The previous night I tried guiding in PHD. The star would still move suddenly in the RA and DEC directions. When the guiding was turned off the star hardly moved over the course of 20 minutes so this is probably due to the commands sent to the mount and how the mount (or scope) deals with them. One thing I noticed was that during calibration the star would move in the opposite direction when the calibration direction changed from west to east or from north to south (i.e. continued in North for steps 1 and 2 when calibrating south) Today I re-balanced the scope in the DEC direction and cleaned the cobwebs I discovered in the OTA (along with a dead spider which now resides in a hoover). Tonight with PHD the star was only lost in the DEC direction. When the scope was pointing at Arcturus the star was lost after around 20 minutes compared to 10 when it was pointing at Leo. I tried stopping the guiding as soon as it looked like the star would be lost and it seemed to drift less (not definite) so it may be that the guiding is sending the wrong commands to the mount leading to a feedback process. When the guide star is displaced by a large amount by tapping the scope in each direction it can re-centre the star. In Maxim the star would sometimes drift but increasing the aggressiveness would account for this. After around 10 minutes the star would jump downwards out of the frame and be lost. Is it possible that this could be due to Mirror shift? It seems unlikely that it would only be in the RA and DEC directions. I have also removed the USB extension cable to the lodestar and secured the cables more thoroughly. I will be posting the tracking logs tomorrow. I hope I can get this sorted by the end of the week :S Until then, Clear skies!
  6. The wonders of Sigma clipping Example of stars drifting in the dumbbell nebula also in the same night (10min Sub)
  7. Hey all, Last night I tried imaging the Leo Trio with a new setup. I was using a QSI 500 with a Starlight xPress Lodestar OAG autoguider attached to a C11 SCT and focal reducer all on a NEQ6 mount. When guiding, the guidestar would jump suddenly in either the RA or DEC directions causing the star to be lost in PHD guiding (Maxim DL was able to bring the star back after around 45 seconds.) These 'jumps' would not occur periodically and varied from 0 to 4 times per 15min Sub with an average of 2. Although the fainter parts of the image appeared fine the brighter stars showed spikes where the guide star had moved suddenly in one of the RA or DEC directions. There was no wind and the scope was fairly well balanced (its a heavy scope though) and well aligned in the polar scope (no drift alignment). As there is no mirror lock for the C11 the sudden jumps may have been caused by mirror shift but could they have been in only 2 directions and at right angles to each other? Another thing I noticed was that the jumps would only occur in 1 direction in the RA but both in the DEC. I have also had a similar problem when using the same setup on a HEQ5 mount with a starwave ED80 refractor. I am using an extension cable so the lodestar can reach the computer not sure if this will affect the signals being sent to/from the computer. To find out whether it is caused by the guiding next clear night i'll leave the main imaging camera looping and look for the images shifting with guiding turned off. I have tried adjusting the aggressiveness of the guiding in Maximdl but the guidestar moves out of the cross-hairs before the guiding makes large corrections to bring the star back. I have not had these problems when using a QHY5 on a finderscope (which guides fine for 20 minute subs with the ED80 but gives egg shaped stars on the C11 due to flexure) Overall I am pleased with the results from last night with a surprising amount of detail in all 3 galaxies and the flat frames working well for once removing almost all the vigenetting (there is still a mysterious faint massive donut over the image which i have no idea where it came from-dust perhaps?) I am open to suggestions and appreciate any help. Posting updates soon.
  8. Hi there, You need to listen close to the mount to hear the motor moving when you select manual guide in PHD after you press either North South East or West button. Recently , I have problem with North South calibration and realized the ST4 cable needs to be pushed in tight into the QHY5 camera, I now taped the ST4 cable to the camera and since than I never encounter the North South calibration issues again. This may not be your case but worth checking Kim
  9. I am relatively new in Astro imaging, I read the threads wit interest. I started with DLSR (Canon ESO 550D) and thought I get great results until I decided to go mono with ATIK314L+ and filter wheel. Like most of us I cannot decide whether OSC or Mono with filter wheels. The following images of the orion nebula was taken in November and December this year and after stacking I thought the result is 100 times better then a DLSR although I have no OSC to compare with. DLSR Atik Mono using HA,RGB filter
  10. I am very impressed with the Orion Nebula from photos I have seen in this forum. Recently bought the ATIK 314L+ Mono and QHY5 for guiding and my first go at the Orion Nebula . HA filter 10 mins x 10, RGB 10 mins x 5 each. Quite please with the result after stacking the photos though the trapezoid is burn out it SKywatcher HEQ5 mount - Starwave SWD 80ED PHD guiding with QHY5
  11. Hi Eddy, I have a Starwave 80ED and ST80 Guide scope piggy back on top with SW Guide mount on HEQ5 mount with canon 550d. Not sure what the weight capacity for EQ5 but on this forum someone mentioned 15Kilos for HEQ5 Kim
  12. Thanks Adam I am beginning to like this scope. I took a few more DSOs after the M45 and I can see the running man nebulae quite distinctively taken with this scope compare to the 200P Kim
  13. Bought this scope last week and was surprised by the quality of the scope. It is very well made The Crayford focuser is 3" and very stable. The focuser has two speed and is very large. It came in a padded aluminium case. with vixen type dove tail and two quality mount rings. I also bought the 0.8x reducer which is optional. The canon EOS camera mounted nicely with this reducer and the set-up is rock study. I am very please with the results taken so far of DSO Attached a picture of the Pleiades (M45) taken with this scope
  14. Clear sky tonight. Using the LVI Auto-Guider with no problem via diagonal. Paolo from LVI Italy has confirmed using the diagonal should not be an issue and should guide accordingly
  • Create New...

Important Information

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