The advantages of a 100mm diameter objective lens cannot be overstated when viewing at magnifications over 50x. Having a surface area 1.5x that of an 80mm OG Fieldscope, the ES 100 GA ED/45° is easily able to outperform 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. Preferred HDF eyepieces include a 30xWW and 42xWW plus the 27-80x zoom. For Astronomy, the ES 100's versatility as a compact F650mm 4 inch refractor with erected image viewing should not be underestimated. Magnification options for this application include 6mm and 5mm long eyerelief eyepieces delivering 107x and 134x respectively. The magnification can be further increased to 335x by using the 2.5x Tele-Adapter option.

Weight is kept to a minimum by the selective use of tough plastics and aluminium components and the model is very well balanced for easy field use on a tripod.

Other features of the ES 100 GA ED / 45° include: waterproof construction, rubber covered lens hood, conveniently positioned wide band focusing wheel and rotating tripod sleeve to enable maximum versatility in hides or viewing in sitting or prone position.

The ES 100 is easily converted to a 1500mm/F.15 Telephoto lens for SLR Photography.

Supplied complete with a 30 year guarantee.