| The SC1 modification is the basic method used to get the CCD based webcams to take long exposure pictures. This modification is based on Steve Chambers SC1 long exposure modification. I have now sold my 8i telescope and have nothing better to do than try to break somthing ;-) | |||||
| I found only one page that had the necessary description for the mod. of the Pro II cam, I am sure there is more pages out there. | |||||
| Thanks for sharing Philip Davis. | |||||
| I have used the Introductions written on his page with only minor modifications. | |||||
| Since the space inside the camera is so small I decided to go for a little link instead of a switch on the front. This switch only switches between normal use and long exposure use so itīs not much in use. Itīs not beautiful but small. |
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| The wiring is the same as described on Philipīs pages. | |
| SAA8116 Pin 93 and 97 | PD16510 Pin 8 and 10 |
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| Cutting the tracks are a delicate matter and must be done with a steady hand. | |
| It seems that I have cut the tracks a little bit different than Phillip. | Using a microscope is a advantage. |
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| The interface board is almost the same, I used a smaller size resistor than Phillip to save space and mountet it on the legs of the DG418. |
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| And then I was ready to test it. | |
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| 36 sec exposure in dark a rom, only the laptop screen is a light source. Distance is roughly 2 meters. |
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| 36 sec Darkframe, a good deal of noise and hot pixels here. Temp was 25 c. |
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| Darkframe subtraction. |
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| Noise removed i Neatimage. |
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| So far so good, when the new scope comes we will see how good it really is. |
