www.astrocafe.hk

那天剛好天氣很好，透明度高，所以想說試試看用Canon 600D的錄影功能來拍攝黑子

拍攝資料：
114900+3xbarlow
Canon 600D 720p 攝影，59fps，40秒
因爲后段在轉檔時損毀，只剩下1550張
stack 233張

剛疊加完的


調了unshapen mask，crop了黑子

很好的開始，調焦尚可改善。

用了什麼樣的減光方法?

社長 寫:很好的開始，調焦尚可改善。

用了什麼樣的減光方法?

謝謝社長~

便宜的1.25"調焦，調了很久就是不准焦。。。

用了solarfilm減光，應該是5.0的solarfilm~

若用3.8的會好些，曝光時間可以短些，又或者影像比例大些。

若用黑白相機，便可以配Green Continuum濾鏡，影像比例及銳利度都會高些，當然最好用Herschel Wedge取代Solar Film了，前者拍米粒組織容易得多。

If the focal length of your scope is 900mm, the use of 3x will give you 2700mm. Unless seeing is extremely good, you are unlikely to get sharp image. That's why you couldn't focus well.

Daytime seeing tends to be much worse than that at night. Forthe sun, I frequently only image under 2000mm and mostly under 1500mm.

社長 寫:若用3.8的會好些，曝光時間可以短些，又或者影像比例大些。

若用黑白相機，便可以配Green Continuum濾鏡，影像比例及銳利度都會高些，當然最好用Herschel Wedge取代Solar Film了，前者拍米粒組織容易得多。

以後出了社會做工就會買好的配件來搭配拍攝~還在求學，沒那麽多資金。。。

David 寫:If the focal length of your scope is 900mm, the use of 3x will give you 2700mm. Unless seeing is extremely good, you are unlikely to get sharp image. That's why you couldn't focus well.

Daytime seeing tends to be much worse than that at night. Forthe sun, I frequently only image under 2000mm and mostly under 1500mm.

thanks for your advice, next times image the sun i will use under 2000mm and try~~