Tested my new refractor at my backyard last night.
Pointed the scope to zenith (90 degree), takes many 10 sec exposures with L filter.
Imaging with my STT-8300 CCD, guiding is on with very smooth guiding curve.
The focuser is tighten too.
Here are some diagnosis images:
(1) You can see egg shape of stars at the top-left and top-right corners.
(2) If I rotated the CCD to 90 degree, the egg shape stars are now at top-right and bottom-right corners.
(3) If I rotated the CCD to 180 degree, the egg shape stars are now at bottom-right and bottom-left corners
(4) If I rotated the CCD to 270 degree, the egg shape stars are now at bottom-left and top-right corners
I also point the scope to 45 degree and see if there is any flexure on the imaging train. The egg shape stars are still the same. I also tighten the focuser very hard so it should have nothing to do with flexure...
Not a pretty picture but I really enjoy digging out the faint stuff from this 120sec exposure. I was trying to image this faint and small comet (5.5"), but found a weird shape of fuzzy. Turns out it is a galaxy with interesting shape.
FSQ-85 with 0.76x
120s with L filter
Only process with flat and some stretch...
Consider this is my first official night out to image with my CCD. Joined 3 other friends and do an all nigh imaging. The image above is not fully processed yet, will need more NB data. 12 sub, 1200sec each with 7nm Ha filter.
BLM is kind of in the middle of nowhere ...
A couple images of our setups...
There are some bullets on the ground... kind of scary...
Still learning SGP
Jing Wee took several very amazing Milky Way images for me !!
Weather has been bad since last year. Finally we have a relative clear weekend.
There are about 20+ scopes there and most of them doing visual.
I take my FC-100 out the first time.
I setup close to Ryan (my friend) who has a very nice 10" Dob.
This is also the first time I use DSC (digital setting circle).
It is like cheating as star-hopping is no need now.
I look at the following objects from 9:30pm to 12:00am.
There is also a 8inch refractor there !!
The sky was OK dark but not very transparent.
I am not sure if I trust the SQM reading from my iPhone.
The milky way is not visible...
First time to try this local site (Montebello) close to Stanford. About 45min door-to-door from my house. (http://old.observers.org/sites/) The site is not as dark as BLM but it is good enough for me. I decide to go this place more often for narrow-band imaging.
Spent most of the time testing the FSQ-85 + STT-8300. Still struggle on the SGP auto focusing.
The star shape at the corners are not perfect too. This makes me thinking to upgrade to FSQ-106...