About Lake Afton Public Observatory's
16-inch Ritchey-Chrétien telescope

Telescope Specifications

Primary Telescope

Sigma 16
41-cm Cassegrain Telescope System - Reflector

Primary Mirror	16-inch clear aperture, F/3 focal ratio
Secondary Mirror	4-inch diameter
Focal Length	5400 mm
Focal Ratio	F/13.5
Mount	Equatorial, off-axis

Secondary Telescope, Refractor (white)

6-inch Refractor
Lunt Engineering ED-APO Refractor
*ED-APO (Extra Low Dispersement - Apochromatic Lenses)

Aperture	152 mm
Focal Ratio	F/7.9
Focal Length	1200 mm

Telescope Eyepiece Magnification and Information

16" Main Telescope (5486 mm Focal Length)

	Drawer	Eyepiece	Mag	2x Barlow Mag
Default	1	2" Pentax SMC XL 40 mm	137
Options	1	2" Explore Scientific 28 mm	196
	1	Celestron 25 mm Plossl	219	439
	1	Celestron 32 mm Plossl	171	343
	2	Celestron 17mm Plossl	323	645
	2	Tele Vue Wide Angle 19 mm	289	578
	2	Tele Vue Wide Angle 24 mm	229	457
	2	Celestron 25 mm Ortho	219	439

6" Refractor Telescope (1200 mm Focal Length)

	Drawer	Eyepiece	Mag	2x Barlow Mag
Default	1	2" Explore Scientific 28 mm	43
Options	1	2" Pentax SMC XL 40 mm	30
	1	Celestron 25 mm Plossl	48	96
	1	Celestron 32 mm Plossl	38	75
	2	Celestron 17mm Plossl	71	141
	2	Tele Vue Wide Angle 19 mm	63	126
	2	Tele Vue Wide Angle 24 mm	50	100
	2	Celestron 25 mm Ortho	48	96