香港天文論壇

XR250 寫:我都未決定20/7-22/7會去邊，這幾日你地會住在哪裏？

22/7去烏鎮，要收特別入場費嗎？

XR250兄,我吔團會21/7到烏鎮啊! 我哋一班坐記會員22-23号會係杭州啊,有興趣到時聚一聚啊!

1.小人(大埔)
2.ally(大埔)
3.SunnyWong(沙田)
4. Nosneb (大埔)
5. noodle(沙田)
6. Wongsir(沙田)
7. anguslau (大埔)
8. xiaoer (粉嶺, 大東北)
9. opa (大埔)
10. marco1415(ShaTin)
11. elton (大埔)[/quote]
12. Titan粉嶺

講者: Chanlunlun LT 參加者: bingsze Steve Wah! anyone joseph Eddy So syyuen168 Tarepanda Subaru Tinping Raymond Tse noodle Lam Chi Wah CH Yeung papaya kai Willis koichi 扒飯撈麵 TONGKW xiaoer 十十軒 ?? johncamposhk ?? czm97176 ?? Lewis 隠形的大祭司 一棵草 WFPC2 Skywalker layanata daniel cck PeterPeter A/45 Titan Tenmon...

（一）磨鏡班部份：
1) bensonlee
2)
3)
...

（二）香港天文儀器展銷及新鏡測試：
1) MAN
2) bensonlee
3) Titan
4) Tenmon

誠讓 1. Starlight Xpress - SXV-M8C One-Shot Color High Resolution CCD, USB2.0 interface連guidehead. 99.9% new(never use) 平讓$9800 2. Losmandy G-11 EQUATORIAL MOUNT WITH LOSMANDY GEMINI GOTO SYSTEM control and tripod with extra a. 21 lb. weight b. Aluminum motor covers. Set (2) c. Polar Scope (finder) d....

Just buy for the back up camera. But I still have one problem when using the aperture priority mode. It can't fix the aperture while zoom to the other focal length. The zoom lens built for this camera is not using constant aperture type. Aperture value changes from wide to tele is normal. opa , I w...

The zoom lens built for this camera is not using constant aperture type. Aperture value changes from wide to tele is normal. :lol: :lol: titan兄用慣d專業恆定大光圈變焦鏡, 梗係唔慣用呢d variable aperture zoom啦. Subaru兄, I will select the difference set under what condition needs! I will not use the恆定大光圈鏡 when doing th...

Just buy for the back up camera. But I still have one problem when using the aperture priority mode. It can't fix the aperture while zoom to the other focal length. The zoom lens built for this camera is not using constant aperture type. Aperture value changes from wide to tele is normal. opa 兄, I ...

Just buy for the back up camera. But I still have one problem when using the aperture priority mode. It can't fix the aperture while zoom to the other focal length.

WenXP 寫:今天去旺角找過, 發現甚少店舖有售, 就算有也沒甚麼選擇...
該去哪兒買?

TST新三共(Nikon, Kenko or Hoyo) may be the cheapest in HK.

http://www.dcview.com.tw/article/newreadarticle.asp?id=351 http://www.dcview.com.tw/article/newreadarticle.asp?id=3229 以上兩篇來自dcview, 有不錯的說明. 不過我還是有疑問... 一般來說, 偏光鏡分兩類: 線型偏光鏡(PL) 和 環型偏光鏡(CPL). dcview那文章說PL可能會影響測光, 但CPL則較不會. 但CPL較貴. 我想問, 除了影響測光和價錢高低外, 兩者還有甚麼分別? 特別是在攝影效果上? 以我所知,一般PL不能用在autofocus camera...

Hi Mbike, I am interested in getting a GPS devices too. But I am an absolute novice in this area. So I haven't get one as of today since I am completely overwhelmed by whats available in the market. Hope you can give me some guidance here. :D Can this device be used in HK? Where can I find maps to ...

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Tokina AT-X 107 Zoom is full-frame fish eye lens for DSLR @ 10mm, and becomes full-frame fish eye lens for Film SLR @ 17mm The Canon camera I'm using is 350D, that means it won't have 180 degrees by using any (pure) Film SLR full-frame fish eye lens :( Wah哥仔,資料可能有些不對,Tokina 那支應同Pentax那支幾乎同一設計,Penta...

TONGKW 寫:根據 Tokina 的公佈，此 Tokina AT-X 107 Zoom 是 “full-frame fish eye lens”.

唐生,呢支Full Frame fish eye lens,係指一個APS size CCD or CMOS 裹可用盡180度(魚眼效果),不会黑角,另外有些魚眼鏡只会出一個圓形影像。
*遲些補些照片