Monday, October 03, 2022

20221002 Short Observation: M31 and Jupiter

M31 taken with my mobile phone, Samsung S20+ 

Next up is Jupiter with my 80mm refractor, 5x powermate with my ASI

upper one higher gain with faster shutter, apparently more detail, faster shutter is better for freezing poor seeing.

lower one clean at lower gain with slower shutter, a bit over exposed.

Tuesday, September 27, 2022

20220926 Jupiter Opposition

Just my very first Jupiter in Scotland, very poor capture, one of my worst shots.

Probably out of focus and very poor seeing.

Just a record, pretty cold outside at six degrees celcius only, it's now autumn.  

The OTA probably couldn't reach thermal equilibrium from inside taken outside, no need to be serious for taking planets with a 80mm scope.

Thursday, September 01, 2022

2022 Aug 31 Sun

 Second imaging session, still learning to work with the new stuff and new environment.

1546 UT, Ranger at prime focus, ASI190mm


Two frames mosaic, it's hard to tune Tmax and richfield under bright sun light.

False color:

Friday, August 26, 2022

2022 Aug 25 Sun - first in Scotland

I rather took images during my stay in Leeds, and I have recently relocated to Scotland, and we have bought a small home and so it's now to resume imaging!

The small foldable table is for placing my computer, a cardbox was used as a sunshield.  The trusty Nextar mount was dead while in Leeds, it's now placed by a az-gti mount.

The sun has been active, and we have aurora alerts at night.  My backyard was not dark enough probably.

This is my first solar shot in Scotland, less than desirable but absolutely a new start.

Two frames merged together 1519 and 1523 (GMT), captured with ASI190mm without reducer, prime focus of my trusty Ranger.

Monday, May 02, 2022

2022 April 30

Two frame mosaic without reducer, slightly downsized to reduce artifacts, colorized.


1059 and 1104 (GMT+1)

Thin cloud floating around. 

I'm closer to getting back to normal imaging.

Wednesday, April 20, 2022

2022 April 20 Another attempt on solar imaging


I have decided to use my macbook for imaging, it has a brighter screen which should be helpful.  

After capturing, the AVIs were transferred to my PC for processing.  Maybe I shall try installing Windows on my macbook?  Anyway.

Now I've a little bit more experience with my azgti, and it's up and tracking very quickly.  I've used my iPad air as the control.  My old ipad mini has very little power left, I mean the battery.

First up is a failed full disc shot with the reducer, it's taken at 1004 UT.  It's 1104 for the local time, but we are not in day light saving mode.

Tuning the T-max and Richfield still requires some more practice, it's so far away from the laptop screen.  Pulling the laptop screen closer but the sunshine prevents that.

Next up is taken with reducer off, cropped:

Close up is less demanding to T-max and Richfield combination, taken just 4 minutes later, i.e. 1008 UT.

Friday, March 18, 2022

18th of March, second real trial on the Sun


I couldn't really tune the T-max and Richfield due to the limitation of the DIY notebook screen shade.

I just tilted the T-max according to my memory, and Richfield on its two ends.  I shall find better way for image capturing.  

Maybe I shall set the tripod lower, sit on the ground, and make a bigger notebook screen shade.