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DFK 41AU02.AS Did I buy the wrong one

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#1 peetyg

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Posted 12 January 2013 - 08:26 AM

Im new to imaging and just purchased dfk41 with ir cut filter. My primary use will be to image the planets and moon. I currently own a celestron cpc 9.25hd. I also own a 2.5x powermate barlow. Everthing i find on the internet seems that people use monochrome with filters. Should I return what I bought? I seem to find very few images with this camera. Any advice would be apprecitated.

thanks

Peety

#2 Petrus351

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Posted 12 January 2013 - 08:49 AM

For planetary imaging, I think DBK21´s and DMK21´s are a better choice, because you can obtain more frames per second.
This first picture, was taken on 01/08/2013 with my C9.25 and mono camera in RGB mode
Greetings from Pedro (Spain)

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#3 Petrus351

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Posted 12 January 2013 - 08:54 AM

And this other one, the same night with the same scope and color camera DBK21AU618.AS

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#4 peetyg

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Posted 12 January 2013 - 08:56 AM

I know this is a silly question so forgive me. When you shot that photo in RGB mode do you have to use color filters or does the color come out during post processing?

thank you

#5 Mike Phillips

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Posted 12 January 2013 - 09:18 AM

The color cams are a bit tricky, I suggest you use some of this info:

http://www.astroholi...read.php?t=2108

Mike

#6 peetyg

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Posted 12 January 2013 - 09:24 AM

Sorry made a mistake its model dfk 41au02.as..Does that change your recomendation? Does image capture frame rate 60 vs 15 ect make a difference.

#7 PiotrM

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Posted 12 January 2013 - 09:26 AM

And to avoid circular artifacts it would have to be 7,5FPS max - for planets it's a big limitation + the sensor isn't very sensitive nowadays. For Moon/Sun mono would be much better.

#8 Rankinstudio

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Posted 12 January 2013 - 10:33 AM

Peetyg,

Color cameras and monochrome cameras are very different. In a color camera, the colors are being created right at the sensor. Each pixel has a micro filter of either red, green, or blue on it. As not every pixel is dedicated to red, green, or blue, you lose resolution. The software in the computer / cam uses the surrounding pixels to interpolate an RGB value for every pixel on the sensor. So a color camera has about 1/3rd the resolution of a monochrome camera.

Here is how this works: http://en.wikipedia....ki/Bayer_filter

In a true monochrome camera, like the DMK21, there are no RGB micro filters, so every pixel can pick up red, green, and blue light. This is why you have to use a filter wheel with imaging filters to shoot with a monochrome cam. The advantage here is you get a lot more resolution because every pixel will be blue, red, or green.

Cheers :)






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