Quote:
Originally Posted by gbeal
The QSI line appears to use a fixed in place off axis guider, which is slightly different to a dedicated built in chip. Not saying it is no good, just that if you are going to an OAG why not get one and then get a camera, without having to buy the QSI.
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The line pushed by QSI on this issue is that the pick off prism is much closer to the chip than a conventional OAG, so you get a wider field of view for the guide camera. They claim to completely illuminate chips such as found in the Orion Starshoot autoguider (aka QHY5), so there should never be a problem finding a guidestar in the FOV. Also, once the guide camera is set at the same focus as the main chip, it's pretty much focused for life because you can screw it down.