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OGS Newtonian Reflecting Optical Tube Assembly Specifications

Model	N-8	N-10	N-12.5	N-14.5	N-16	N-20	N-24
Clear Aperture	8.0"	10.0"	12.5"	14.5"	16.0"	20.0"	24.0"
f-No.	f/6	f/5	f/4.8	f/5.5	f/3.75	f/4	f/4
Secondary Dia.	1.83"	2.60"	3.10"	3.10"	4.25"	5.00"	5.50"
Tube Dia.	10"	12"	15.5"	18.0"	19.5"	24.5"	29"
Tube Length	48"	50"	60"	80"	80"	80"	96"
Weight	30 lbs.	35 lbs.	55 lbs.	90 lbs.	105 lbs.	160 lbs.	230 lbs.
Focuser Tube I.D.	2.2"	2.2"	2.2"	3.2"	3.2"	4.2"	4.2"
OGS** Mounting	HP50	HP50	HP75	HP75	HP75	OGS100	OGS100

* Back Focus as measured from the rear mounting plate of telescope.
** Minimum suggested mounting requirement.
(All specifications are nominal measurements and subject to change without notice.)

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