香港天文論壇

I replaced the filter in fornt of CMOS with baader IR/UV cut filter to improve the transparency of Ha channel.

Wongsir 寫:陳一平, 300D改動了甚麼呢?
為什麼要改?
可以介紹一o下嗎?

Wongsir
6-10-2004

Composited of 10 30-60 seconds frames. Taken with C8 at f/6.3 on EM-200 without any giuding. Sky condition was very bad and the attitude is just about 10 degrees. Location is my roof at Park Island (branch of astrofarm observing station) Time is about midnight on 5th Oct.. The result actually is ver...

石豐文？

hi folks,
I found a very interesting website which is irrelavent to stargazing. Please take a look. It is http://www.reboothk.org/.

Very bad news. Please read the attached.
據悉，我國重量級資深業餘天文學家，發現SOHO彗星最多的中國愛好者（國際
排名第四），《天文愛好者》雜誌編委周興明於2004年8月4日晚在福建連城
遭遇車禍，於2004年8月5日凌晨5時搶救無效去世。在此，謹代表中國天文
學會普及工作委員會及全國所有天文同好，向周興明的去世表示沉痛的哀悼，
並向周興明的家屬表示深切的慰問！
中國天文學會普及工作委員會
2004年8月5日

Wah! 寫:多手仔又來喇~
把Carl Chan同埋Carl Chan的黑白+彩色相合成一張.

It is very great. I have tried before but fail on maching star. However, I don't like the red. Can you change little bit more? For the astrophotography trip, I will leave for Taiwan in Augest. Folks can call me for detail.

Taken with Epsilon-210 plus NJP. 1 hr exposure on hypered TP6415. Location is Taiwan. Very little image proccessing impost. Please comment.

Taken with FSQ on E100S. Location is Taiwan. 1 hr exposure and sky is very clear. What is the nebula, or where is the region of starfield?

Ugly finger!!! Like toe!!!

Subaru 寫:20040608 9:48:25UT, 用C5投影在天文年歷上.

Try to use deepsky H-alpha filter. But no any difference shown.

The CCD is clean now.

Just on time to take first shot.

Taken with 250mm reflector yesterday, the one used for Jupiter image I have post. This is my first shot of lunar image. Please comment to improve.

I process too fast. May be little bit over. Seeing is not very good. Overcloudy very soon afterward.

Passerby-B 寫:d 個係ngc264, 即係先排掃帚佬個x'mas tree.
想問幅相有乜唔妥

You remove noise in denoise-median so that the small stars disappear. If not, maybe you correct the tracking error. Is it correct?