Quote:
Originally Posted by pmrid
Another factor that has emerged as I play with this - and that's the effect of the cooler box on the "distance-to-sensor" figure. If you're using an MPCC or some other reducer/flattener which has a tight tolerance for this - e.g. the 55mm of an MPCC - then there will be a problem. The T-Ring will have to sit in the camera and inside the box - meaning that there will need to be some form of external connecting ring. In the photos I've attached below, you'll see I have put such a ring in place. It screws through the box lid and into the T-Ring but at a cost of about 8-10mm added distance to sensor.
Peter
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Yes this will be an issue for me Peter, as i use a Baader MPCC, which is one reason for leaning towards the 'cold finger' or gas cooling. The box is looking more and more problematic. As pointed out in a few links on this subject, there is no need to waste effort and money trying to cool the entire camera when its only the sensor that requires it. I will bow out of this box discussion and not side track the thread. If I find a cold finger solution I will start a new thread.