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Firewire camera price lowered

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發表於 2007-11-26 14:06:19 | 顯示全部樓層 |閱讀模式
Good news for those who want 1394 ccd cameras.  A local vendour has lowered the price.  These are Astro cameras without the IR cutting filter.

型號
類型 / 解析度 紅外濾光 價格
DMK 21AF04.AS 單色 640x480 否 HK$3,120
DMK 31AF03.AS 單色 1024x768  否 HK$5,560
DMK 41AF02.AS  單色 1280x960 否 HK$6,960
DFK 21AF04.AS 彩色 640x480 是 HK$2,800
DFK 31AF03.AS 彩色 1024x768  是 HK$5,560
DFK 41AF02.AS  彩色 1280x960 是 HK$6,960
DBK 21AF04.AS 彩色 640x480 否 HK$2,800
DBK 31AF03.AS 彩色 1024x768  否 HK$5,560
DBK 41AF02.AS  彩色 1280x960 否 HK$6,960
發表於 2007-11-27 00:10:24 | 顯示全部樓層
 樓主| 發表於 2007-11-27 09:21:06 | 顯示全部樓層
Daniel,
I know. It is the same price.
I am considering to get the USB or firewire version.
The vendour says that the USB version gets power from the USB cable also but I have doubt as 12V is required, USB will not provide 12V.
 樓主| 發表於 2007-11-29 09:37:23 | 顯示全部樓層
Daniel,
I have checked the USB version.  It uses just 5 Volt for operation.  However, the current requirement is 500 mA.  I believe this is too much for the USB of notebooks.
5 volt and 500 mA means 2.5 watts, which is about the same as the firewire version of 12 volt, 200 mA.

PTS
發表於 2007-12-21 15:51:11 | 顯示全部樓層
DFK does have built in IR block.
 樓主| 發表於 2007-12-21 20:52:25 | 顯示全部樓層

Lowered price for imageingsource camera

Hi, I am not sure I should disclose this:  I get a 5% discount off the $6960 price of the 41AF02.AS.

I have not yet placed my order.  Maybe Oldfield can advise if it is worthwhile to own one as I already have the Stellacam3 (640X480, NTSC), and a PAL Mallincam.  Both are very sensitive for low-light level.  I can get down to 16th magnitude on the Hokoon 0.5 m telescope (f/8) on clear nights.  These are mainly for occultation work.
Then I have a 2k by 2k by 15 fps Imperx.  This is mainly for bright objects and comes with a relatively large CCD (about 15 mm by 15 mm). Exposure can be from 10 micro second to 10 seconds.  I was able to record some nebulosity of the Pleaides with 10 s exposure.

The Imagingsource camera is attractive for it removal of the IR cutoff filter and 60-min exposure time.  However, like my Imperx, it is not cooled (while both the stellacam3 and the Mallincam are cooled)

PTS
發表於 2007-12-21 21:09:57 | 顯示全部樓層
I guess you better check the sampling with your primary instruments.

5% discount off is the usual offer from the local dealer if you pre-order from them (i.e. non stocking items).

Finally, which camera to choose depends on your primary application, for me, I've a 31AF03.AS for narrow band solar imaging, a DBK 21AF04.AS for planets.
發表於 2008-1-7 17:12:08 | 顯示全部樓層
我都正打算買部 (DBK 21AF04.AS 彩色 640x480) for planet, 不過唔知應該買 IR Block or No IR Block? 可唔可以教下我? 多謝!
發表於 2008-1-7 18:11:32 | 顯示全部樓層
個人認為 DBK (無 IR block) 好過 DFK (有 IR block), 因為似乎除左映火星之外, 都無需要用 IR block
發表於 2008-1-7 23:09:27 | 顯示全部樓層
各有各好. :-) 若所影的行星或月球的高度低於70度,大氣色差的情況會令到紅外線移位,令到影像有殘影。DFK有一好處就是若沒有帶IR filter,都唔怕。

你問下Daniel就知 ga la. hahah

Eric
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