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Hi Peter,
I've had a look at John's scope and we both had the same question on the reducer/flattener.
I believe the current F ratio is F7.5, we've tried a DSLR as well as John's DSI.
Wouldn't a 0.5x reducer or similar be required to widen the FOV and image DSO's like eta carina or the rosette? Else is it dependent on the imaging chip?
and once he uses a 0.5x reducer would that then need a flattener?
The current field is flat but what would it be like with a reducer?
Also, wouldn't the reducer lower imaging time to achieve the same apparent brightness?
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