香港天文論壇

So I think the turned down edge is top issue for me to tackle first.

Will be it like going back to #1200, and grind with 1/3 W stroke?

Hello Chanlunlun,

it is 8 inch, f/6

thanks for your tips!!

焦內: http://i913.photobucket.com/albums/ac331/bigtrumpet/IMG_20180605_004742_infoc_zpshmffq5cb.jpg 焦點: http://i913.photobucket.com/albums/ac331/bigtrumpet/IMG_20180605_004922_foc_zpsc6ajfu4a.jpg 焦外: http://i913.photobucket.com/albums/ac331/bigtrumpet/IMG_20180605_005219_outfoc_zpslfopmzef.jpg 發現中央有山,...

RIP

這網址是關於他生平,出版箸作,電視節目, 電影等

http://www.hawking.org.uk/

有沒師兄師姐見過這款調焦座? 是哪牌子的出品?

50多年前的紀錄片段, 好珍貴. 尾段有談及 60cm反射鏡
http://hicbc.com/special/6039/contents/39_0112lens/

師兄,

請問這三腳架有幾重?

李生,



改用了LED, 體積是否可再縮小一點?

[good job]

Hello Edward,

interested

Pls see PM

thanks

Joseph

Hello,

請問售出左未?

EdwardLaw

Interested in middle one,

Pls see PM

thanks!