So you are probably wondering what this eyepiece is for. Well if my maths do not deceive me at 2.3 mm to get a bare minimum 0.5mm exit pupil needs a F4.6 scope. So it is for short tube reflectors. At that focal ratio it provides about 51 power per inch. So it is a high power planetary eyepiece with good eye relief (20mm) obviously overpowered in my f8 scope but still fun I wonder what it would be like in the f4 short tube 8 " GS 600 reflectors at Andrews...
