- Objective Lens Diameter (mm): 66.5
- Minimum Focus (m): 3.8
- Nitrogen Gas Filled:
- Waterproof:
- Rubber Armoured body:
- Length (mm): 326
- Weight (gms): 1049
Developed around an all new optical system featuring objective lens sizes of 66.5mm and 81.5mm plus the option of straight-through or 45° angled viewing, GS Fieldscopes set a new benchmark in affordable lightweight telescopes for birdwatching and general wildlife observation. 'High end' optical performance and value; The GS series takes the two size model range concept a stage further by increasing the 65mm OG model to a 66.5mm OG model and the 80mm OG model to an 81.5mm OG model without any noticeable gain in size or weight. As a direct result, the GS 815 gains 47deg; surface area over a standard 80mm OG and GS 665 5° over a 65mm OG. The increase in the amount of light entering the instruments coupled with an all new optical configuration, new prism units and revised multi-coating results in significantly higher levels of optical clarity over preceding models. Images are extremely bright whilst retaining excellent colour saturation so important for accurate identification.
'Ease of use' and 'functionality' are all important when using an instrument in the field and the GS series is designed to provide class winning optical performance seamlessly in an array of different outdoor conditions.
As telescopes need to be used with a solid tripod for image stability, any weight saving is crucially important. Constructed using lightweight materials where at all possible, the GS 665 weighs under 1000g. The focusing system is designed to allow adjustment from infinity to 50 metres in just a 270° turn. Housed within the same mechanism for convenience is a 9:1 ratio accurate focus adjustment.
GS Fieldscopes are protected by 'full body' natural rubber armour with a textured finish to the top half of the main body prism housing. The centrally positioned focusing wheel allows easy access for both right and left handed users and is also rubber covered - delivering a positive feel with or without gloves. Designed to enable rotation around the main axis of the instrument for use on a bipod or in a hide with a high window, GS fieldscopes feature a solid die-cast tripod sleeve with -/+ 90 degrees each-way action with 45° incremental 'stops.'
To avoid problem of reflected light on the objective lens in bright sunlight all models are fitted with a retractable lens hood extending 28mm (665) and 40mm (815).
Extensively tested for continuous trouble free use in varying temperatures, the models are fully nitrogen gas filled and waterproof and come with the assurance of a 30 year guarantee.
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