香港天文論壇

各位

試下影麻鷹，好熱鬧喎佢地！

http://www.raymondtse-lawyer.com/bird/2 ... agles.html


Raymond Tse

12. Raymond Tse ASI 178MC x 1

Uploading 4k video clip to youtube at :-

https://www.youtube.com/watch?v=PfBkX1FCsPA

Dear all,

4K at Youtube :
https://youtu.be/IG3Ka0lSpKo

A video clip for the lovers of Lotus :
http://www.raymondtse-lawyer.com/flower ... lotus.html

Thanks for watching.

Raymond Tse

人仔

Dear all,

A video clip of watching Sunset. No filter was used.

http://www.raymondtse-lawyer.com/astro/ ... unset.html

Youtube 4K version :
https://www.youtube.com/watch?v=PfBkX1FCsPA

Raymond Tse

Dear Wong Sir,

2014-11-10 (星期一),
時間:下午6:30至7:00 (逾時不候, 遲到者請先電話聯絡)
地点:沙田火車站B出口

I would attend around 6.45 pm. See you on Monday evening.

Raymond Tse
Sun 09-11-2014

Very good stuffs.

The best east looking location should be Sai Kung.

Raymond Tse

Dear Wong Sir,

My order of 2 items are in order.

Raymond Tse

1. S8052 天文深空摄影冷冻相机 适合翻盖型佳能，尼康相机 天文冷冻相
机. RMB580.

2. S8053 重锤杆星野摄影夹　大力螃蟹脚. RMB 75.

Raymond Tse

Very nice illustration.

No wonder I could make real 3D Moon
when I took photos several months apart.

Raymond

The airy disc is a bit large.
Perhaps airy disc could be smaller without the reducer.

Not sure what is effect on field flatness without the reducer.

Falling dust over CCD surface

For Starizona Hyperstar HD lens, the backfocus as follows :- C8HD : 39.8mm C9HD & C11HD : 59.7mm C14HD : 67.4mm Not sure of the backfocus of the third party T2 to E mount adapter but should be ok for larger size HDs. The only inconvenience is the 48mm screw-in filter adapter for narrowband filters. ...