Definitely the AP155 with the 155TCC reducer/flattener has produced the best medium widefield images I have seen. My AP140 with the same reducer is also a powerful widefield astrograph, very similar being a scaled AP155 lens (same tube).
FSQ the best of the wider field images to date.
I am hoping my TEC110FL will also be an awesome widefield imaging machine but yet to be proven.
Greg.
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