Raymond
23-05-2005, 02:24 AM
Dear all,
After some prolong period of clouds, rain and fog, better weather
(transparency 7/10; seeing 6/10) arrived on Saturday 21-05-2005 light but the Moon age was 14. However, I still wanted to try out imaging with TEC140 F7 APO which arrived some months ago.
I have added Robo Focus while retaining the 10:1 dual speed FT
focuser on the right hand side. Fine-tune focusing was slow as I did not have any autofocusing software at hand at the moment.
Here is an image of M27 taken at UT20.30. 15 images of 1 min each unguided (I have set up my friend STV but had no time to calibrate as it was near sunrise at 4.30 am when the images were taken). Taken by Canon 350D (unmodified) over EM200 Temma 2 mount.
The night was very humid : 90% RH at 23 degree Celcius. Luckily, the long dew shield with home-made extended 8-inch paper dew shield protected the objective lens from dewing.
Image size slightly cropped. Stacked and slight processing only. No flat field processing has been done yet.
http://www.astrofarm.net/dbphoto/loadimg.php?id=4893
Raymond, Hong Kong
After some prolong period of clouds, rain and fog, better weather
(transparency 7/10; seeing 6/10) arrived on Saturday 21-05-2005 light but the Moon age was 14. However, I still wanted to try out imaging with TEC140 F7 APO which arrived some months ago.
I have added Robo Focus while retaining the 10:1 dual speed FT
focuser on the right hand side. Fine-tune focusing was slow as I did not have any autofocusing software at hand at the moment.
Here is an image of M27 taken at UT20.30. 15 images of 1 min each unguided (I have set up my friend STV but had no time to calibrate as it was near sunrise at 4.30 am when the images were taken). Taken by Canon 350D (unmodified) over EM200 Temma 2 mount.
The night was very humid : 90% RH at 23 degree Celcius. Luckily, the long dew shield with home-made extended 8-inch paper dew shield protected the objective lens from dewing.
Image size slightly cropped. Stacked and slight processing only. No flat field processing has been done yet.
http://www.astrofarm.net/dbphoto/loadimg.php?id=4893
Raymond, Hong Kong