You can reduce or eliminate fan vibration by sitting the fan on silicon pads on the heat sink. There are some very efficient heat pipe type PC graphic card or cpu coolers that fit TEC dimensions really well and are light weight.
I run a cold finger cooled DSLR and easily achieve -25C below ambient temp.. however, optimal is -5C to eliminate any sensor signal noise. A simple temperature controller will allow you set point temperature hold without having to fiddle with voltage control yourself.
Good to see people adapting the ZWO cameras.
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