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Hi Allan,
Was not aware of the built in wedge of the SE series, sounds like that will eliminate field rotation. However that extract from Cloudy Nights does not give you any confidence.
As far as the wind is concerned, most of us give up when the wind starts gusting, the scope only has to move a dozen microns and you end up with double stars everywhere. Well my 8in F5 is a weather vane anyway.
The reason why SCT's are said to be not so good for DSO's is mainly due to the long focal length. A lot of the larger DSO's will not fit into the small FOV, Galaxies will be OK though.
The 1250mm focal length of the 5SE is not too long and would be OK for DSO's
Cheers
Bill
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