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Imaging source camera try

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#1 Jay B

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Posted 15 February 2013 - 11:19 PM

Hi:
I had a few folks ask me to post results on trying an imaging source camera -dbk 618 - for electronically assisted astonomy. I was able last night to take a shot of the orion nebula and nearby NGC 2261 - Hubble's variable nebula with a celestron cpc 9.25 inch using .5x focal reducer in what I would say are semi-rural skys.
Orion was taken at 5 seconds show while NGC2261 was at 9 seconds. The attached are with no stacking-so this is what I was seeing. This is way more than I can achieve visually. I couldn't begin to tell you how this would compare to another camera at these exposures since my experience has been planetary imaging not in this area.
A downsize for this camera is the small chip- which makes it a little more difficult to find an object on the screen-I would guess. The plus with this camera is the software which makes real time imaging easy-- these cameras are designed as industrial grade web type cameras so I believe the software is made for real time viewing. Anyways, I would say if you already own one and want to give this a try it is worth getting a focal reducer to see if you might want to pursue this type of viewing more.

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#2 Jay B

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Posted 15 February 2013 - 11:19 PM

Here is hubble's variable nebula.

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#3 mattflastro

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Posted 16 February 2013 - 12:15 AM

Thanks for the images, they look clean with very little to no visible noise . It's clear that the camera can do more, image fainter objects . Exposure time could be increased, the 5 sec are more or less like the x128 sense up . Gain could be increased too. Also, a .5x focal reducer is on the moderate side. You could use .33x and get both the advantage of a wider field and brighter images. Most video cams use more extreme reducers for M42 than you did.

#4 jgraham

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Posted 16 February 2013 - 07:56 AM

I've had a lot of fun observing with my DBK21 and DMK21. The software is very well suited for real-time viewing of the streaming video and there are excellent controls available to adjust the live image. I haven't used it on my camera-assisted observing gear yet, it's usually on my planetary imaging scope, but this encourages me to experiment with it a bit more. Thanks for sharing!

#5 Jay B

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Posted 16 February 2013 - 11:15 AM

Thanks for the comments. I was trying to represent what I could see close to live (under 10 seconds) I had the gain set at about 75-80% of the camera's potential, so it could have went higher. Does anyone have a recommendation on a good .33x focal reducer?
Jay

#6 jgraham

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Posted 16 February 2013 - 11:26 AM

I have the Celestron f/3.3 reducer, but it is a tad finicky. I rarely use it. The f/6.3 is very nice.

#7 bhuvfe

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Posted 16 February 2013 - 05:25 PM

Don't buy a new meade 0.33 focal reducer. I have it and I cannot go lower than 0.45 without image degradation on the edges. The new optec is a lot better (but more expensive).
The celestron 0.63 is fine. Using a cheap 0.5 + a 0.63 is also a way to get to f <4.






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