Helios Solana RangeA range of high quality, well constructed porro prism binoculars finished in attractive, black rubber armouring. Knurled rubber finger grips ensure they are secure and comfortable to hold. All models feature quality BK 7 prisms and all optical surfaces are fully coated, providing very good optical performance. Overall these binoculars offer construction and performance which belie their modest prices. All models are fitted with a tripod adaptor bush

offer a 60º field of view through a six-element fully multi-coated lens system

wide field view in most telescopes

355mm Parabolic Primary Mirror (Low-Expansion Borosilicate Glass)

Compact housing: doesn't need much space

Its narrow 7nm FWHM bandwidth has a transmission at H-Alpha of over 90%

this one focuses specifically on DSLR cameras

Bahtinov masks are made from precision laser cut ABS plastic

fog-free operation

Dovetail Saddles: 2 x 45mm (Accepts Sky-Watcher/Vixen type Dovetail Bars)

along with reduced gear backlash

The Nikon T ring fits 99% of  Nikon DSLR cameras including the following:

30% more Light Gathering than 114mm