Opticron HR 66/45° ED - High Resolution FieldScope
	OG diameter (mm); 66mm Durable Natural Rubber Armour Nitrogen Gas Filled Waterproof Length (mm): 315 Min Focus (m): 4.5 Weight (g): 1290
Same features as the HR 66/45° but by using an ED or 'extra low dispersion' glass element in the primary objective system, these Fieldscopes provide higher colour saturation than conventional glass objectives. More apparent at higher magnifications and under certain light conditions (e.g. when looking over water on a bright warm day) colour correction remains constant across the magnification range. The ability to discern indistinct objects like coloured rings on birds or shades of plumage, combined with all the features of the HR 66, make these models the definitive choice for the professional ornithologist. ttention to detail in features such as natural rubber armouring, wide-knob focusing, rotating tripod sleeve & retractable rubber covered lens hood, make the HR 66 the standard that other quality fieldscopes are judged against.

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