Art. –Nr. SKY-Zoom-8-24
Skywatcher Zoom 8 – 24mm
Very good at 8mm, also close to the edge. At 24mm just a bit more than half of the field of view is really sharp, close to the edge (10% of field of view) is blurry.
x-axis: distance from optical axis in °, y-axis: resolution in arc minutes
Apparent Field of View:
The apparent field of view is approx. 64° at 8mm, but to be viewed in total only if you move your head. At 24mm is is going down to 36° only.
Very good contrast over the complete zoom range.
Pincushion distortion is noticeable at 24mm and somewhat less at 8mm.
Comfortable. At long focal length the field of view is moving in the outer parts when turning the head. This effect is normally known from Kellner-type eyepieces.
Nice quality with foldable rubber eye cup and grip coated body. However, the zoom mechanics has a little bit of play.
Contrary to most zoom eyepieces the optical drawbacks of this zoom are in the long focal range. At short focal length you get a nice wide angle eyepiece with really good optical performance.