香港天文論壇

本地所拍的DSO影像已差不多張貼完，是時候另開新相集了。 因器材不利，又常用懶惰攝星法 (unguided)，所以影像質素並不優，張貼完後，RAW data好大機會從始消失，固此又是一個遺照集。 1. RHO Taken with EF85mm F1.8 lens + 350Da in National Park in NZ in 2008 @F2.8 12x360s @iso400, unguided with Vixen GP mount Stacked in DSS with darks calibrated Processed in PI and PS 雖然高空有高層薄雲(?)，夜空仍...

Reprocessed without DBE in PI and saturation stretching in PS. Very minimum sharpening in PS as well. To me, it looks more natural and like the view at medium power through a 8" to 10" scope.

90. M56 Taken with DIY 6" F5 Newtonian + TV paracorr + 100Da in YL last night @ ~860mm F5.75 15x90s @iso800, autoguided with Vixen AXJ mount Stacked in DSS with dark calibrated only Processed in PI and PS Originally wanted to try my cooled mono cmos camera setup with that newtonian. However, unstabl...

89. M27 (1600MM + 100Da) L channel: taken with DIY 300mm F4 Newtonain + Vixen corrector PH + 1600MM in YL @1140mm F3.8, autoguided with Vixen AXJ mount Color data: taken with Vixen ED81SII + HD reducer kit + 100Da in Taiwan @495mm F6.1, autoguided with Vixen AP non-goto mount M27_L_100Da_iso1600_8x2...

9. Adapter for my cooled cmos camera set So as to set my cooled cmos camera parfocal to Vixen corrector PH with my 100Da, I had to tailor made this adapter. But very unfortunately, I didn't measure the actual thickness of the filter wheel with a T-2 threaded ring detached, just using the data on the...

8. Non-rotatable helical focuser for 6" Newtonian After test, image shift is very minimal (close to zero). The whole set (focuser + camera) is about 1.4kg, which may be a little too heavy to my DIY 6" F4 Newtonian. But it may only work well with DSLR or OSC. It should be quite dfficult to install a ...

7. Brackets for 5cm guiding scope

為完善和簡化旅攝時自動導星系統的安裝，設計和用廢料製作了這套導星鏡架。若有興趣也要一套相類似的，請PM與我聯絡。

That is a re-processed version in PI and PS with no complicate skills applied. The contrast seems looking quite good on monitor with HDMI input. Will it look good too on cell phone's display? Taken with EF35mm F2 lens + 40Da in Coonabarabran in 2010 @F3.5 10x180s @iso800, unguided with GP mount 2010...

88. M71 Taken with DIY 6" F4 newtonian + Vixen corrector PH + ASI1600-MM in YL yesterday @570mm F3.8 R=G=B=1x75s, autoguided with Vixen AP non-goto mount RGB combined in PI with any calibration Processed in PS A test shot to see if the new adapter made by me works well for coupling ASI1600 cam onto ...

Goto 大行其道，手機無人沒有，香港普天下還有多少人會用他來幫助找尋天體？

87. California

Taken with Vixen ED70SS + 1.0x flattener + LPS + 300Da @PTC in 2010 @400mm 5.6
13x300s @iso800, autoguided

Pentax XP 系列目鏡，鏡片組件內使用ED鏡片，提供極優質的目視(特別是月球、行呈)和目鏡投影放大攝影。菲林年代，便用67大底拍攝月面環形山，曰本高手們大多都用 此糸列目鏡以投影放大方式拍攝。

24.5mm (0.965") 尺寸規格，長放防潮箱內，外觀與鏡片狀況條件皆極優。
1. Pentax 3.8mm HK$1000.
2. Pentax 24mm HK$1400.
兩者一同購買， HK$2100，加送一個能用於1.25"規格的對焦座。有意者，歡迎 PM，回覆貼文或whatsApp 與我聯絡，謝謝。

這麼多年來，用菲林或數碼感應器拍過的彗星，應該有十多顆或更多。未來日子將會減少拍攝，人生亦在減數中，所以便設立這個相集，為過往的拍攝做個記錄。用菲林拍攝的，要找一找，稍後才貼出來。

先以這個波波彗星作開始，亦以第一顆及第一次用DSLR拍攝的。

1. Holmes at 20071026

Taken with Vixen VMC260L + 350Da @iso400 in YL @3000mm F11.5
Unguided with Vixen Atlux mount

Check PM please.

phy16250 寫: ↑

週日 09 8月, 2020 22:20

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