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Built to withstand use in harsh climates while still offering notable optical quality, the straight viewing HR 66 GA ED 18-54x66mm Fieldscope with SDL v2 Eyepiece from Opticron features a five-element apochromatic objective lens system with two extra-low dispersion elements to maintain high viewing resolution and clarity that is nearly void of chromatic aberrations. Benefitting this design, all air/glass surfaces have also been treated with an N-type extra wide band multicoating that improves contrast and color accuracy by maintaining light transmission.
Complementing the optical design of this scope is an equally robust magnesium alloy body construction that has been filled with nitrogen and hermetically-sealed for protection against all elements. Textured rubber armoring improves handling, as does a centrally-located focusing wheel, for focusing as closely as 16.4' away, and +/-90° rotating tripod collar. Additionally, a retractable lens hood shields the front element from stray light and a rotating eye cup on the eyepiece increases comfort when viewing.
66mm objective diameter
18-54x zoom SDL v2 eyepiece
111 - 69' field of view at 100 yards
High definition five-element apochromatic objective lens system with two extra-low dispersion elements works to maximize viewing resolution and eliminate nearly all chromatic aberrations
An Opticron N-type extra wide band multicoating has been applied to all air/glass surfaces in order to maintain light transmission with improved contrast and color fidelity
Eyepiece includes eight elements in five groups for wide-field definition throughout the zoom range
Use and Handling
Eyepiece is in-line with the scope's objective
Retractable lens hood
Integrated rubber objective lens cover
Centrally positioned focusing wheel
+/-90° rotating tripod collar
Rotating eye cup
Well-suited to use in extreme temperatures or climates
Magnesium alloy body with texture rubber armoring
Nitrogen-filled for water and fogproof performance
Hermetically-sealed against dust and moisture
In the Box
Opticron HR 66 GA ED 18-54x66mm Fieldscope with SDL v2 Eyepiece (Straight Viewing)
Objective Lens Cover
SDL v2 Eyepiece
Soft Padded Case for Eyepiece
Limited Lifetime Warranty for Both Scope and Eyepiece
Table of Contents
Objective Lens Diameter
Field of View
111 - 69' @ 1000 yd / 33.8 - 21.0 m @ 1000 m
Minimum Focus Distance
16.4' / 5 m
Exit Pupil Diameter
3.7 - 1.2 mm
20 - 18 mm
Eyepiece Lens Diameter
1.0" / 26 mm
Not specified by manufacturer
Not specified by manufacturer
Nitrogen-filled and hermetically sealed scope Waterproof eyepiece
11.4" / 29 cm
2.7 lb / 1.2 kg
Opticron HR 66 GA ED 18-54x66mm Fieldscope with SDL v2 Eyepiece (Straight Viewing) Review