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Firewire Camera - any experience

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16 years 10 months ago #63743 by pj30something
Replied by pj30something on topic Re: Firewire Camera - any experience
The thing is...people get the mono because the CCD doesn't have to divide its work on each color so the images are very crisp and detailed as well as more sensitive to light (good if your using it to guide)

If I had red, green and blue filters, i'd slap one on at a time, take a red bunch of frames, same with green and blue and then process them together to make whats called a LRGB image...typically far better quality than a color image. If you buy the color cam, one can't expect to have the sharpness equal to its mono varient.


I for one would not sacrifice sharpness over colour. As you say in so many words "The colour can be added later".

Paul C
My next scope is going to be a Vixen VMC200L Catadioptric OTA

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16 years 10 months ago #63778 by Frank Ryan
Replied by Frank Ryan on topic Re: Firewire Camera - any experience
I'll be getting the colour version in the States in March.
(I'm too lazy for filter wheels!)
From what I can see (and from a test done by Pete Lawerence in TS@N Mag)
they are snapping on the heals of the Skynux and Lumenara .

My Astrophotography
Shannonside Astronomy Club __________________________________________
Meade ETX-125PE, Bresser 10 x 50 Binos & Me Peepers

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16 years 10 months ago #63782 by dave_lillis
Replied by dave_lillis on topic Re: Firewire Camera - any experience
I use the webcam (toucam) extensively on the planets and one of its seriously limiting factors is its low sensitivity at high frame rates, this is an issue when trying to pump up the barlow power and the image dims, this is where these DMK cameras really shine!
Given the lack of imaging opportunities in this country and the usually bad seeing (jet stream), I'd go for the colour camera also, I just cant see myself capturing 4 AVIs for every resultant image I want.
I'd select the 640x480 version of the camera as it does the full 60fps, the bigger chipsets do not, for planetary imaging the smaller chip is not an issue, I'd use the canon for the moon.

As for firewire over USB2, I cant think of any advantage of one over the other in this application, ideas anyone ?

PS, would you not want the IR cut off filter ??

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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16 years 10 months ago #63791 by Frank Ryan
Replied by Frank Ryan on topic Re: Firewire Camera - any experience
I'd be on the same page as Dave for exactly the same reasons.

As for firewire over USB.
Firewire should give you less dropped frames etc.

I'd also think the IR cut filter would be needed.,
This is after all is essentially a Planetary / Moon camera no?

My Astrophotography
Shannonside Astronomy Club __________________________________________
Meade ETX-125PE, Bresser 10 x 50 Binos & Me Peepers

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16 years 10 months ago #63796 by dave_lillis
Replied by dave_lillis on topic Re: Firewire Camera - any experience
hang on, doesn't the firewire version require an external power supply, the usb camera doesn't !!!, that seals it for me, usb all the way.
Needing an external PSU means you need mains power in the field.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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16 years 10 months ago #63824 by FoxK
Replied by FoxK on topic Re: Firewire Camera - any experience
Frank...I have no experience with the color and surely its much less sensitive than the mono so I wonder how much less?.....if one's interested in planetary imaging, I also use the philips SPC900NC ($55USD) so I wonder if that's just not a better option? If you'll ever consider needing a guider cam, then the DMK would be better with its longer exposure times.

My image with the green box was on the philips cam, not the best but with a 600mm FL 80mm APO, its not bad..hard to get good magnification though. Using photoshop, I combined some RGB data from an old Saturn I had to the monochrome luminesence DMK image I took for this end:

Orion 80mm ED Apochromatic Refractor
Meade 70-AZ-A 70mm Guider
PHD on a GPUSB interface
CG-5 Advanced GT Mount
Cams:
Nikon D40x with T-Adaptors
Philips SPC900NC
Imaging Source Monochrome DMK 21AU04.AS

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