Sky Division, Peterson Engineering Corp.							www.peterson-web.com
	Eyepiece Comparison for use with 12" f/10 LX200GPS SCT
12" f10 has a	3048	mm focal length
Magnification = telescope FL / EP FL
Actual field of view (in degrees) = (Dia of eyepiece field stop X 57.3) / Telescope FL
(Field stop and focal length measurements must be in same units.  The 57.3 factor converts from radians to degrees)
Exit pupil size = EP fl / scope focal ratio
Meade 2" Schmidt thread aperture is only 38 mm (1.5" dia)
Alt calc for actual field of view = Apparent field / Mag
				Apparent	Actual					calc for
				field of	field of					actual
			Dia of EP	View	View	Exit pupil	Eye		Approx.	field of
Eyepiece	EP FL	Mag	field stop	(degrees)	(minutes)	size (mm)	Relief	Tube	Price	view (min)
Meade 4000 Plössl	56	54	49.0	52	55.0	5.6		2"	$     200	57.3
Meade Super Wide	40	76	45.0	67	50.5	4		2"	$     300	52.8
Meade 4000 Plössl	40	76	29.0	44	32.5	4		1.25"	$       80	34.6
Meade Super Wide	32	95	37.4	67	42.2	3.2		2"	$     240	42.2
Meade 4000 Plössl	32	95	29.0	52	32.5	3.2		1.25"	$     100	32.8
Meade 4000 Plössl	26	117	23.0	52	25.8	2.6		1.25"	$       80	26.6
Meade Super Wide	24.5	124	28.0	67	31.4	2.45	20	1.25"	$     180	32.3
Meade 4000 Plössl	20	152		52	20.5	2		1.25"	$       80	20.5
Meade Super Wide	18	169	21.0	67	23.6	1.8	17	1.25"	$     150	23.7
Meade 4000 Plössl	15	203		52	15.4	1.5		1.25"	$       80	15.4
Meade Ultra Wide	14	218	20.0	84	22.4	1.4		1.25"/2"	$     300	23.1
Meade Super Wide	13.8	221	16.0	67	18.0	1.38	10	1.25"	$     140	18.2
Meade 4000 Plössl	9	339	9.7	52	10.9	0.9	10	1.25"	$       80	9.2
Meade Ultra Wide	8.8	346	13.0	84	14.6	0.88		1.25"/2"	$     240	14.6
Meade Ultra Wide	6.7	455	9.8	84	11.0	0.67		1.25"	$     200	11.1
Meade Ultra Wide	4.7	649	6.8	84	7.6	0.47		1.25"	$     170	7.8
ClearVue 2" 30mm	30.0	102	44.8	80	50.3	3	22 mm	2"	$       99	47.2
ClearVue 2" 15mm	15	203	22.0	80	24.7	1.5	17 mm	2"	$       89	23.6
Panoptic	41	74	46.0	68	51.6	4.1	27	2"	$     500	54.9
Panoptic	35	87	38.7	68	43.4	3.5	24	2"	$     365	46.9
Panoptic	27	113	30.5	68	34.2	2.7	19	2"	$     330	36.1
Panoptic	22	139	25.0	68	28.1	2.2	15	1.25"/2"	$     280	29.4
Panoptic	19	160	21.3	68	23.9	1.9	13	1.25	$     240	25.4
Panoptic	15	203	17.1	68	19.2	1.5	10	1.25	$     210	20.1
Nagler type 5	31	98	42.0	82	47.1	3.1	19	2"	$     620	50.0
Nagler type 5	26	117	35.0	82	39.3	2.6	16	2		42.0
Nagler type 4	22	139	31.6	82	35.5	2.2	19	2"	$     445	35.5
Nagler type 4	17	179	24.5	82	27.5	1.7	17	2"	$     370	27.4
Nagler type 5	16	191	22.1	82	24.8	1.6	10	1.25"	$     320	25.8
Nagler type II	16	191	23.0	82	25.8	1.6	10	1.25" or 2"	$     310	25.8
Nagler type 4	12	254	17.3	82	19.4	1.2	17	1.25" or 2"	$     340	19.4
Nagler type 6	9	339	12.4	82	13.9	0.9	12	1.25"	$     280	14.5
Nagler	9	339	12.9	82	14.5	0.9	12	1.25" or 2"	$     240	14.5
Nagler type 6	7	435	9.7	82	10.9	0.7	12	1.25"	$     280	11.3
Nagler	7	435	10.1	82	11.3	0.7	10	1.25"	$     220	11.3
Nagler type 6	5	610	7.0	82	7.9	0.5	12	1.25"	$     280	8.1
Radian	18	169	18.3	60	20.5	1.8	20	1.25"	$     228	21.3
Radian	3	1016	3.3	60	3.7	0.3	20	1.25"	$     228	3.5
UO Konig Mk 70	40	76	46.0	70	51.6	4	20	2"	$     200	55.1
For reference, moon has a 1/2° disk, Pleiades is 2°, North American Nebula is 3°
Bold green text denotes eyepieces that are vignetted without an EyeOpener
Disclaimer: See actual eyepiece manufacturer's literature for most accurate specifications and pricing.
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