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The SX filter wheel is an option but a more expensive and less flexible option (I have 2 FLI cameras and at the moment all 3 cameras use the FLI filter wheel). It would also require a new set of filters and extra adapters to fit but yes the mini would work the USB perhaps with a thinner Planewave adapter. The advantage is I could get 36mm 3nm Ha and O111 later for half the price of 50mm square filters.
The 35.5mm TS unit would be too thick as I have about 19mm available for an OAG. The 9mm plus adapters may just make it but its close as to whether it would come to focus.
The ONAG from Foresight Innovations seems interesting especially with their new autofocuser but 66mm and too small an opening for a 16803 chip.
At this stage it seems between a 9mm TS OAG or the SX filter wheels.
Being such a critical piece of gear its surprising how few decent OAGs there are on the market.
Greg.
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