part 1: comparison of popular astrophoto image sensors, CCD

criteria of sensor for astrophotography:

-low readout noise
-cooling
-high quantum efficiency
-large enough chip size to match with telescope's FOV

From Philippe Bernhard:

From PointGrey:

Sony's ExView HADII, ICX694/ICX674(same chip but smaller size) seems to best all-round

from Xpírijensis astrofotografa

Biblioteka Riklaunima

and

ATIK

留言

這個網誌中的熱門文章

越南香草

Ngo ~ "N-gaw" Mui ~ "Moo-ee" Ngo ~ "N-gaw" Mui ~ "Moo-ee" Ngo ~ "N-gaw" Mui ~ "Moo-ee" Ngo (N-gaw) , Mui (Moo-ee ) Cilantro Ngo Gai (N-gaw guy), Mui Tau (Moo-ee Tao), Ngo Tau (N-gaw Tao) Mexican Coriander, Sawtooth Coriander, Culantro 　　娥女帝(拼音), 刺芹　　特徵：娥女帝是短株形的植物，氣味清淡，葉邊呈鋸齒形，十分容易辨認。來源地：越南。功效：和白夏差不多，娥女帝亦有祛濕、解毒及驅風的療效。建議食法： Pho, (Bánh Xeò) 越南煎餅, 炒菜,湯,咖哩 Ngo Gai ~ "N-gaw guy" Mui Tau ~ "Moo-ee Tao" Ngo Tau ~ "N-gaw Tao" - See more at: http://vietworldkitchen.typepad.com/blog/vietnamese-herb-primer.html#sthash.I9rzkzwI.dpuf Rau Ram (Rau Rahm) Vietnam Coriander, Laksa Leaf, "Vietnamese mint(actually not a mint)" Peppery, quite spicy. In salad Hung (Hoong), , Hung Lang (Hoong Lang) Spearmint. Vietnamese coriander Hung Lui (Hoong Lou-ee), Hung Diu(Hoong Zee-ew) round mint used in salad Hung Cay (Hoong Kay) Mint Rau Que, Hung Que (H

閱讀完整內容

劣質洗衣機入水喉

上面白色是最易找到,$2x. 但漏水. 灰色, $4x, 是假冒 "MADE IN ITALY" 假冒 "MADE IN ITALY" 的標緻左面是白色膠喉的喉頭, 右面是灰色膠喉的喉頭, 上圖左面是真正好貨 ( MADE IN ITALY )灰色膠蓋.右面是冒牌白色膠蓋. 膠蓋在安裝扭緊時爆開上圖左面是真正好貨 , 標了其他規格.右面是冒牌, 單單印了 MADE IN ITALY 好貨的膠蓋是可以下移, 露出喉頭及黑色軟膠墊黑色軟膠墊是有坑紋. 質感較柔軟. 緊後可以"迫實"水龍頭及喉蓋, 沒有滲漏正板 MADE IN ITALY 賣 $4x, 價錢絕對合理. 冒牌貨在旺角新填地街買的, 也是$4x. 真是要小心!!! NB: MADE IN ITALY 是否真正意大利制造實在無從考証

閱讀完整內容

沖田博文 Hirofumi Okita 60cm F3.25 dobsonian telescope

the making mirror from Mike Lockwood webpage youtube uwakina bokura other ATMers in Japan blueforest anettai

閱讀完整內容

Hello!! It's Joseph

搜尋此網誌