Opticron Spotting Scopes : ES 100 GA ED Mk II

Opticron ES100 GA ED

The advantages of a 100mm diameter objective lens become clear when viewing at magnifications over 50x. Having a surface area 1.5x that of an 80mm OG fieldscope, the ES 100 is easily able to out perform similarly specified 80mm (ED and Fluorite models) delivering brighter images with a higher resolving power. For terrestrial use, better definition and higher colour contrast mean more accurate and more enjoyable long range viewing.

For Astronomy the ES 100's versatility as a compact F650mm 4" refractor with erected image viewing should also be considered. Magnification options for this application include HDF 6mm and 5mm long eyerelief eyepieces delivering 107x and 134x respectively.

The advantages of ED
By using an ED or 'extra low dispersion' glass element in the primary objective system, these fieldscopes provide a higher degree of colour correction when compared to conventional glass objectives. More apparent at higher magnifications and under certain light conditions (e.g. when looking over water on a bright warm day) the image appears sharper and colours remain truer to life across the magnification range.
The ability to bring into clear and sharp focus indistinct objects such as coloured identification rings or shades of plumage in poor light over long distances are the hallmarks of an HR ED fieldscope. This extra optical clarity combined with all the features and exceptional build quality make them the definitive choice for the professional ornithologist.

Opticron ES 100 GA ED Specification:
OG diamator: 80mm
Min Focus: 10m
Length: 497mm
Weight: 2800g
Guarantee: 30 years.

SDL Eyepiece:
A 5-group 8-element 'super' zoom, the 40935 SDL has been designed to maximise the performance gains inherent in Opticron ED objective lens fieldscopes at higher magnifications. Offering an optimum ratio between field of view and resolution, the main viewing characteristics of the SDL eyepiece are superior cross-field definition at all magnifications coupled with exceptional viewing comfort. Mechanically the eyepiece is waterproof, uses the M41.5 collar thread attachment, features a 90 degree rotation between high and low magnification settings plus a rotating eyecup that can be positioned to match individual needs. Supplied in soft padded case.

HDF Eyepieces:
The preferred choice for quality and viewing comfort, HDF eyepieces have large dia. eyelenses and provide 'walk-in' field of vision. All eyepieces feature long eyerelief for full field of view with or without spectacles and fixed magnification models are wide angle.

HR Eyepieces:
Good choice eyepiece for the value conscious requiring long eyerelief, as all eyepieces offer full field of view with spectacles.

Special Order
These items are not normally kept in stock, delivery takes 5-10 working days from the date of ordering.