Telescopes in established aluminium construction. The large objective lens diameter enables observation in razor-sharp detail due to excellent light-gathering qualities even at high magnifications.Fluoride-containing HD lenses minimise colour fringing (chromatic aberration) and deliver contrast-rich images with razor-sharp outlines. Ideal for digital photography through the telescope.The angled version is eminently suitable for observing in comfort whether the birds are on the ground, in trees or in awkward positions such as high above in the sky .