New Meade Deep Sky Imager

Post by **Airconvent** » Wed Aug 18, 2004 10:53 pm

Following Meade's low end LPI imager, they are now introducing another higher end one. Check out the link below for early info on the ccd..

http://www.astronomics.com/main/product ... t_id=ASDSI

rich

swee sin · Post by **swee sin** » Tue Aug 31, 2004 3:00 pm

not sure it will performed as good as they advertise! since it just another webcam base ccd camera and without extra cooling feature! :?

swee

MooEy · Post by **MooEy** » Wed Sep 01, 2004 8:42 pm

meade advertising z.z

~MooEy~

swee sin · Post by **swee sin** » Wed Sep 15, 2004 3:39 pm

right now there is a info/review on this meade DSI product, anyone who interested can visit this websiteor join the yahoo group. humm... look quite good performance for this little ccd imager!

http://deepskyimager.meade4504telescopes.org/

universe24 · Post by **universe24** » Wed Sep 15, 2004 3:43 pm

From Meade website, there mentioned about the cooling system inside the DSI. But anyway, the pixel size is low. Not up to my standard at 1MP above.

swee sin · Post by **swee sin** » Wed Sep 15, 2004 4:00 pm

yep, it's just 640x480 picture size! quite small when you compare with recent digital camera picture size! it's even smaller then you do 2x2 binning!

universe24 · Post by **universe24** » Wed Sep 15, 2004 4:07 pm

I think the only so called advantage is it can expose up to an hour. With proper cooling system, it seems no big problem. Compare to those recent DC or DSLR(max eposure ~30mins) is already better. But to us at hot weather condition, noise still a problem.

kingkong · Post by **kingkong** » Wed Sep 15, 2004 4:53 pm

universe24 wrote:I think the only so called advantage is it can expose up to an hour. With proper cooling system, it seems no big problem. Compare to those recent DC or DSLR(max eposure ~30mins) is already better. But to us at hot weather condition, noise still a problem.

correct me if i'm wrong..... but i've decided to forget the ccd route.
foa, ccd is noisy. as TG Tan shares in his experience - cooling is not practical here because it causes condensation.
2nd, even if i've an imager that can do noise-free long exposure, i can't afford a mount that can do 1 hour perfect tracking. unless the DSI can be used for auto-guiding and imaging at the same time - which it currently cannot.
3rd, why do 1hr exposure if i can stack 2 x30mins, 4x15mins, etc?
4th, how often can i do imaging under sky that allow 1hr exposure? or 15min for that matter?

ot a little.... has anyone notice that astrophotography just increased its profile?
http://www.canon.com.sg/
http://web.canon.jp/Imaging/astro/index-e.html

apparently canon has taken notice that many amateur astronomers's are using the eos dslr for astro-imaging. i guess it can only be a good thing that at least one camera maker keeps the amateur astronomers in mind when they design their products in the future.

Post by **weixing** » Wed Sep 15, 2004 5:29 pm

Hi,

2nd, even if i've an imager that can do noise-free long exposure, i can't afford a mount that can do 1 hour perfect tracking. unless the DSI can be used for auto-guiding and imaging at the same time - which it currently cannot.

No mount in the world can do 1 hour tracking without guiding... the best 1 or 2 minutes, unless you are taking wide field astrophotography. Also, Auto-guiding is independance of the main camera... it is another camera and computer that do the guiding, not the one that shoot.

3rd, why do 1hr exposure if i can stack 2 x30mins, 4x15mins, etc?

To get those very dim details or those very dim stars.

Have a nice day.

kingkong · Post by **kingkong** » Wed Sep 15, 2004 6:22 pm

weixing wrote:Auto-guiding is independance of the main camera... it is another camera and computer that do the guiding, not the one that shoot.
3rd, why do 1hr exposure if i can stack 2 x30mins, 4x15mins, etc?
To get those very dim details or those very dim stars.

correct me if i'm wrong, some high end ccd cameras are capable of doing imaging & guiding at the same time. i don't remember the exact details....

i imagine, 99% of the time, longish exposure only give me sky glows, given the low alt, high humi, cloudy, etc condition where i am.