Quote:
Originally Posted by Tandum
Doug, do you know how to fix it? I had the camera on it's own cable but had download speed on normal instead of low, no usb during read was on plus clamping set on, whatever clamp is?
We also resolved the flats issue with this camera. The first image attached is what I was getting as a flat using my light box and RobF was getting something very similar using the T-Shirt method. We think it's a shutter artifact. Turning my light box down using a dew controller output and upping the exposure time from .1 sec to 1 sec produced the flat in the second image, which is what we are used to seeing. These images are stretched to hell of course to show the pattern. Wierd eh ...
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Don't know what the reflection would be as I don't have this model camera as yet. It could well be the usual reflection back onto the IR filter. I always used an IR filter out at the end of the camera adapter. One of the problems which seems normal with most cameras using filters. I did find that Baader seemed to have the best AReflective coatings on their filters. I am going to talk to an optometrist friend about AR coatings and find out what is possible.
Your flats issue I can shed some light on. Tha fact that all the 8300 CCD based cameras have to use a shutter for downloading the image quite hampers the minimum shutter time. From memory the minimum shutter time was something around .12 of a second. When taking flats using my EL sheet I had to use a couple of sheets of white photocopy paper to allow shutter times arount the 0.5 second to capture my flats with this sheet. It is one of the draw backs of having a shutter.