木星攝影記錄 My Jupiter Photography Record

[sing lau]

終於能用Canon EOS Kiss X5 拍了。
昨夜突放晴，這木星是我人生中第一幅行星照，望遠鏡色差大，故上方有藍色影。我用了28x倍數拍，但不夠時間加Barlow, 畢竟已01:00了。今天則又多雲了

沒用相機接環，就把相機站在目鏡前，對準拍，這方法是否有個名稱

Telescope: Arboro ST-60700 refrator
Camera: Canon EOS Kiss X5
Time: 9-3-2015, 00:44

[社長]

拍行星的話，對焦、追蹤、口徑要求都要高一些的，也以攝像頭明顯有優勢。

[sing lau]

謝謝。對焦方面會再做好一點。因為其他方面都還未有能力進步……
其實當晚就像斷了片，可能太睏，現在都忘記當時怎對焦

[社長]

當然也不要預期6公分小鏡可以拍到什麼，紀錄一下四顆衛星位置變化、拍下兩條雲帶，也差不多了。

拍行星，口徑還是決定性因素。

[sing lau]

那天我看見不止4顆衛星，還有一些在木星的上下出現，那是不是他的衛星？

[社長]

你的鏡不大，應是其他星。

[sing lau]

Jupiter Last Night .
Finally, I woke up at 3am to see jupiter, mars, Catalina. It was also my first time using the new 15075 telescope. Of course, jupiter must be the most satisfying as it is massive. It was my first time to see mars too! It was really small in the eyepiece, but I love the red soooo much! Catalina... I gave up, not my level, too hard... .
BKP15075EQ3 Dual motor
Canon EOS Kiss x5 1/100s, f/5, ISO1600
No stacking, stacked version will be uploaded later

[社長]

木星季節來了!

日後轉用攝像頭，配合更精確的調焦，拍出來的水平是可以用躍進來形容的。

[sing lau]

配合更精確的調焦，拍出來的水平是可以用躍進來形容的。

Just made a Bahtinov Mask for the reflector to improve focusing. Tonight continue!

[社長]

魚骨板是為點光源而設計，你可能要把望遠鏡指向恆星，調好後再指回木星才成，但又增加了難度。

[sing lau]

1 Jan night, I practised focussing with Bahtinov mask and captured M42. First I practised with Sirius. It was easier than using dimmer stars.

Photo 1: sirus focussing
Photo 2: comparison of mask focussing and naked eye focussing (up: no mask; down: with mask)
Photo 3: M42 product (not really seriously processed)

[cyrus]

勁。
點解唔用高ISO?

[sing lau]

勁。
點解唔用高ISO?

Avoid more noise. And my polar alignment this time was not so bad. Also, the sky background is too bright. See the raw pic.

[社長]

What a SkyWatcher 150 Newtonian can do on Jupiter,
https://m.facebook.com/story.php?story_ ... 0699129846

[sing lau]

新一年木星季節將近，昨晚間視寧不太差用攝像頭拍了木星。 但調焦不准+大風+距離衝還有一段時間，質素當然不理想。唯一進步是雲帶開始可見波浪狀。

Skywatcher BKP15075
EQ3
ZWO ASI030
Magnifying method: barlow and eyepiece projection
2000, 1000 frames stacked respectively
Processed with registax, photoshop express
Size reduced

[社長]

Magnifying method: barlow and eyepiece projection

通常是巴羅或目鏡投影便可以，可以改變投影距離以調整影像大小，兩者加起來投影是什麼意思?

[sing lau]

我的目鏡10mm 推盡仍是很小，所以加上barlow放大。

[社長]

你的主鏡是f/5，目鏡焦距10mm，假設你用較合理的上限f/40有效焦比去拍，即投影距離為80mm，這80mm是從目鏡透鏡組內部計，所以不是那麼長的。

[sing lau]

最近試用autostakker ，同一批影片可以弄成這樣

[社長]

看到木衛影子投到木星上了