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the BT-100 is ideal for enthusiasts seeking unmatched clarity and comfort in giant binoculars
is a classic air-spaced
an 8 X 50 non-illuminated straight -thru finderscope and quick release bracket
Focal Length 4
This set includes five extension tubes with lengths of 30
50mm Finder Scope Rings - Standard Height Focal Length_1. 3mm - 10mm the BT-100 is ideal forExplore Scientific finder scope rings are all made for 50mm finders. Choose from a classic low profile bracket (about an inch tall), one that is a tad higher (1. 5") or a high profile bracket that stands 4" above the finder scope base. Regardless of the height you choose, these brackets have two rings to hold your finder firmly yet gently, and each ring has three adjustment points. Heavy duty plastic thumbscrews are included, and have large heads for
