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DGM Optics can also provide interferometric data for individual primary or secondary optics. The interferometric data reports are provided via e-mail. The cost is $100.00 for each report. Sample Images

Optical Tube Assemblies

All designs are the “Standard” configuration

Telescope Specifications	The OA-4.0 F/10	The OA-4.0 F/7.5	The OA-6.0 F/7.5
Clear Aperture	100 mm + /- 2 mm	100 mm + /- 2 mm	152 mm +/- 2 mm
Focal Length	1020 mm +/- 2%	750 mm +/- 2%	1145 mm +/- 2%
Secondary	1.18 minor axis elliptical flat	1.18 minor axis elliptical flat	1.85" minor axis elliptical flat
Min./Max. Magnification	25 / 255	25 / 255	35 / 350
Coatings	96% for Secondary 89% for Primary	96% for Secondary 89% for Primary	96% for Secondary 89% for Primary
Focuser	2.0" Low Profile Helical (standard)	2.0" Low Profile Helical (standard)	2.0" Low Profile Helical (standard)
Tube Length/Diameter	43.75" x 6.1"	36" x 6.1"	55" x 8 "
Tube Weight	Aluminum 9 lbs.	Aluminum 8 lbs.	Aluminum 15 lbs.

Optic Sets

Optics Specifications	4.0” F/10	4.0” F/7.5
Clear Aperture	100 mm + /- 2 mm	100 mm + /- 2 mm
Focal Length	1020 mm +/- 2%	750 mm +/- 2%
Secondary	1.18 minor axis elliptical flat	1.18 minor axis elliptical flat
Min./Max. Magnification	25 / 255	25 / 255
Coatings	96% for Secondary 89% for Primary	96% for Secondary 89% for Primary

Optics Specifications	6.0” F/7.5	8.0” F/8.5
Clear Aperture	152 mm +/- 2 mm	203mm +/- 2 mm
Focal Length	1145 mm +/- 2%	1727 mm +/- 2%
Secondary	1.85" minor axis elliptical flat	2.25" minor axis elliptical flat
Min./Max. Magnification	35 / 350	50 / 400
Coatings	96% for Secondary 89% for Primary	96% for Secondary 89% for Primary