Does Vespera Passengers feature a field derotator?
Like Vespera, Vespera Passengers does not incorporate a mechanical field derotator. The field of view will change as images are stacked.
The absence of a field derotator will have only a limited effect (stars at the edge of the field) on photo quality, and will be compensated for by image stacking. The Mosaic function can be used to correct or obtain the desired photo field.