香港天文論壇

8. Milky way taken in NT of Australia

EF8-15mm f/4 zoom + modified %D Mark II in Tennant Creek in Australia @15mm f/4
Single shot of 120s @iso1250, stationary
Color calibrated with LinearFit tool in PixInsight and then final touch in PS

Basically, Vixen Polarie U is a sttar tracker too and an upgraded version of Polarie with 3 improvements.

1. Smaller size,
2. more lightweight, and
3, Autoguidable.

But I want more and so modify it to be an ultra lightweight equatorial mount.

Tailor-made a new non-rotatable helical focuser specially designed for using Vixen coma corrector PH.

7. Milky way

EF8-15mm f/4L zoom + unmodified 100D in Australia in 2019 @8mm Ff/4
Single shot of 71s @iso3200, stationary

The result should be a bit better I am quite sure if it is taken with 6D.

6. Shooting northern sky under almost full moon light

EF24mm f/2.8 + unmodified 1100D in Australia in 2012 @f/2.8
Single shot of 13s @iso400, stationary

Milling tube rings

Done

5. Milky way over my room

Taken with EF8-15mm F4L zoom + unmodified 100D in Australia in 2017 @15mm f/4
Single shot of 40s @iso3200, stationary
With long exposure noise reduction on in camera
Processed in PS

有錢使得鬼推磨，窮鬼唯有自己鑼。

18. Rising milky way Taken with EF24-70mm f/2.8L II USM zoom + 6D in Melrose in Australia in 2015 @24mm f/2.8 Single exposure, 75s @iso1600, with long exposure noise reduction on in camera Direct export from Digital Photo Professional (DPP) Resized in PS Stationary or tracked ? It had been forgotten...

167. DSLR data combined M13

This is a result of combining the color data taken with a 300Da into the L channel.

Color data:
Taken with Vixen R200SS + MPCC + LPS + 300Da in Sai Kung in 2010 @800mm F4
6x300s @iso400, with dark, bias and flat calibrated in PI

Processed in PI and PS

Reprocessed with dark, bias and flat calibrated in PI

166. M13 from Yuen Long last night

Taken with Vixen SD115S + HD flattener + 1600MM in Yuen Long in Hong Kong last night @908mm F7.9
L=66x45s, stacked in DSS with any calibration
Autoguided with Vixen SXD2 mount
Processed in PI and PS

165. M8 and M20

Taken with EF400mm F5.6L + 40Da in Coonabarabran in 2013 @f/5.6
9x90s @iso800, with dark calibrated in PI only
Autoguided with Vixen GP mount
Processed in PI and PS

29. Another milky way taken with fisheye zoom lens

EF8-15mm F4L zoom + 100Da in 2014 in Yulara @15mm F4
4x120s @iso600, with dark and bias calibrated in PI
Unguided with Vixen Polarie star tracker
Processed in PI and PS