香港天文論壇

原廠給Polarie (第一代)追星儀用，幾近全新，並無實際使用過，只開盒拿來作量度製作另一配件嘗試給Polarie U(第二代)追星儀用。

全新價 = HK$850，現放售價 = $600。有意請聯絡我 (PM 、貼文回覆或 whatsApp)

11. Adapters for Vixen flip mirror

For a quick switching a scope for a star finder or guiding scope

Also attach the RAW image for reference.

Reprocess to see if this one looks not so over on cell phone display

Long time no shooting the moon.
Single shot taken with DIY 6" F5 Newtonian + M5 @750mm F5
Processed in PS

10. Veil complex

Taken with EF200mm F2.8L + 40Da in Coonabarabran in 2017 @F2.8
8x180s @iso1600, unguided with Vixen GP mount
Stacked in DSS with darks calibrated only
Processed in PI

94. M1 Conbine 2 sets of data taken at 2 different nights. First set was taken on Nov 16th (FWHM > 6" measured by DSS) and another on Nov 18th (4" < FWHM < 5.5") . Taken with DIY 6"F5 Newtonian + IR blocking filter + 462C @YL at 20201116 @750mm F5 100 x 20s + 100 x 20s, unguided with Vixen AXJ mount...

93. NGC253 Taken with DIY 6"F5 Newtonian + 462C @YL at 20201116 @750mm F5 100x20s, unguided with Vixen AXJ mount Stacked in DSS with darks calibrated only Processed in PI and PS When it was taken, it was very low above west horizon, no more than 30 degrees. Moreover, very poor seeing condition, low ...

2. Milky way

Taken with EF8-15mm F4L + 100Da in Broken Hill in 2013 @12mm F4
390s @iso800, unguided with Vixen Polarie star tracker

A practice on doing HDR on M42 using very old data taken more than 10 years ago so that the core looks not so weired Taken with DIY 6" F5 Newtonian + MPCC + LPS + 350Da @PTC in 2008 @750mm F5 8x360s + 10x60s, @iso400, autoguided with Vixen SXD mount Stacked in DSS Processed in PI and PS FB_M42_20081...

山上單張曝光只數分鐘，香港累積一年也還不及。

Taken with Vixen VSD100F3.8 + 40Da @陰娜山 in Mainland in 2014 @380mm F3.8
Single shot of 360s @iso800, autoguided with Vixen GP2 photoguider in RA direction only
Calibrated with darks only
Processed in PI and PS

92. M72 Taken with DIY 30cm F4 Newtonian + 462C @YL last night @1200mm F4 69x10s, unguided with Vixen AXJ mount (31 frames rejected to stack up by DSS) Stacked in DSS with darks calibrated only Processed in PI and PS When it was taken, it was very low above west horizon, no more than 30 degrees. Mor...

92. M2

Taken with DIY 30cm F4 Newtonian + 462C @YL last night @1200mm F4
98x10s, unguided with Vixen AXJ mount
Stacked in DSS with darks calibrated only
Processed in PI and PS

Very poor seeing condition

去藍山，短期無望；到陰娜，似乎有點機會。

Taken with Vixen VSD100F3.8 astrograph + 40Da @陰娜山 in 2014 @380mm F3.8
Single shot of 240s @iso800, Vixen GP2 photoguider 單軸自動導星

很懷念寶島山上的寒凍， 明年11月可否再上山？

Taken with Vixen Baby VSD + HD flattener + 1600MM in @東埔山莊 last year @315mm F5.7
R=G=B=6x300s, autogided with Vixen AP non-goto mount