www.astrocafe.hk

Blue sky! Red Sun!
LS35T, DMK41, Best 95% of 150 frames

Willis拍全日面時用什麼台架? 我很喜歡這台LS35T，就是若只拍全日面的話，我用相機腳架加個微動雲台就可以。

另想問一下配合5x巴羅的曝光是多少? 我最近也忍不住開了一個DMK31來用，因為經裁切後在電腦屏幕上播放剛好，而幀速則維持在30fps，比較平衡一點。

Yes! The LS35T is a lovely grab & go solar scope! Whenever I do solar imaging, I used EQ3Pro. If I do solely solar observations, I use Porta mount. For the exposure details, I used to set the Gamma to 60 and the Gain between 260 to 320. Given this low gain, the exposures are:
1X (Full disc) about 1/2000 s to 1/3333 s
2.5X about 1/200 s to 1/400 s
5X about 1/30 s to 1/100 s
So for easy memorization, 幾千分一秒，幾百分一秒，幾十分一秒。

willis 寫:Yes! The LS35T is a lovely grab & go solar scope! Whenever I do solar imaging, I used EQ3Pro. If I do solely solar observations, I use Porta mount. For the exposure details, I used to set the Gamma to 60 and the Gain between 260 to 320. Given this low gain, the exposures are:
1X (Full disc) about 1/2000 s to 1/3333 s
2.5X about 1/200 s to 1/400 s
5X about 1/30 s to 1/100 s
So for easy memorization, 幾千分一秒，幾百分一秒，幾十分一秒。

Willis, it's just a joke.


Exposure time =------1---------(倍數/2.5x)
----------------------------- * 10
----------------------2000

ha ha ha....

Willis,
個太陽影得好"正".我就未有得影.
Lewis

willis 寫:Yes! The LS35T is a lovely grab & go solar scope! Whenever I do solar imaging, I used EQ3Pro. If I do solely solar observations, I use Porta mount.

我的想法是，LS35T+ Porta mount，DMK + 手提電腦，可以讓兩三人學生小組做些持續的太陽觀測工作，至少不會讓很複雜的設備嚇怕了學生，以很低的技術門檻讓他們從事科學觀測。

艺术家——把太阳拍出 橙子 表皮 的味道了。

Lewis 寫:

willis 寫:Yes! The LS35T is a lovely grab & go solar scope! Whenever I do solar imaging, I used EQ3Pro. If I do solely solar observations, I use Porta mount. For the exposure details, I used to set the Gamma to 60 and the Gain between 260 to 320. Given this low gain, the exposures are:
1X (Full disc) about 1/2000 s to 1/3333 s
2.5X about 1/200 s to 1/400 s
5X about 1/30 s to 1/100 s
So for easy memorization, 幾千分一秒，幾百分一秒，幾十分一秒。

Willis, it's just a joke.


Exposure time =------1---------(倍數/2.5x)
----------------------------- * 10
----------------------2000

ha ha ha....

Dear Lewis
All data listed here is my experience. But u triggered me to explain it.
If the image size is increase by a factor of 2.5, the energy density of the image will decrease by a factor of 2.5^2 = 6.25. Therefore the the exposure time should be increaseb by 6.25. Similarly, for the case of 5X, the exposure time should be increased by 25. Take my data as an example. In full disc case, the exposure time is about 1/2000 s, the exposure time for 2.5X is 1/2000 * 6.25 = 1/320s and the exposure time for 5X is 1/2000 * 25 = 1/80 s. These are agree with my experience.
Regards,
Willis

Nebulas 寫::) 艺术家——把太阳拍出 橙子 表皮 的味道了。

Can u smell the orange? Yummy!!!

willis 寫:

Nebulas 寫::) 艺术家——把太阳拍出 橙子 表皮 的味道了。

Can u smell the orange? Yummy!!!

我的 味道 指 特征！

Nebulas 寫:

willis 寫:

Nebulas 寫::) 艺术家——把太阳拍出 橙子 表皮 的味道了。

Can u smell the orange? Yummy!!!

我的 味道 指 特征！

如果橙皮上面有些黑點,有危險.