Eyepiece and telescope pairing
Explore Scientific 11mm 82 Degree in the Celestron StarSense Explorer DX 102AZ: magnification and field
What the Explore Scientific 11mm 82 Degree does in the Celestron StarSense Explorer DX 102AZ, worked from the published focal lengths and apparent field.
Field of view
ring = 1.37 degrees true
dot = 1.7 mm exit pupil
- Magnification
- 60x660 mm / 11 mm
- True field
- 1.37 degrees82 deg / 60x
- Exit pupil
- 1.7 mm102 mm / 60x
- Max useful mag
- 241xpublished
Computed optics
- Barrel match
- 1.25 in eyepiece in a 1.25 in focuser
Good fit. In the Celestron StarSense Explorer DX 102AZ the Explore Scientific 11mm 82 Degree gives 60x with a 1.37 degree true field and a 1.7 mm exit pupil, inside the telescope's useful range.
Magnification is the telescope focal length divided by the eyepiece focal length: 660 mm divided by 11 mm is 60x. The true field of view is the eyepiece's 82 degree apparent field divided by that magnification, 1.37 degrees.
The exit pupil, the width of the light beam leaving the eyepiece, is the aperture divided by the magnification, 102 mm over 60x, which is 1.7 mm. That makes this a medium-power general setting.
The eyepiece to buy
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