Borg Optical System Families

 
Borg optical tube families revolve around 4 basic tube diameter families. Each family is designed to share the use of components and may be configured in a variety ways for photographic/CCD or visual use.

	Pocket Borg - Borg's tiniest scope [6025]
	Series 45 - Ultra-compact finder/spotterscopes: 36ED
	Series 60 (formerly MiniBorg) - Compact finder/spotter/guider scopes: 45EDII 50Ach 50FL 60ED 71FL
	Series 80, also available as the Black Series, is based around an 80mm diameter tube, with these variations: 71FL 77EDII 89ED
	Series 115 is based around a 115mm diameter tube, compatible with older medium-format film accessories: 125SD