The Ultimate Guide to Observing the Winter Sky (Northern Hemisphere)

The Ultimate Guide to Observing the Winter Sky (Northern Hemisphere)

Wintertime in the Northern Hemisphere – that magical season when nights stretch long, and the landscapes are wrapped in blankets of snow. The sky is a spectacle on these cold,...

The Ultimate Guide to Observing the Winter Sky (Northern Hemisphere)

Wintertime in the Northern Hemisphere – that magical season when nights stretch long, and the landscapes are wrapped in blankets of snow. The sky is a spectacle on these cold,...

Sport Optics Glossary of Terms

Sport Optics Glossary of Terms

 ABCDEFGHIJKLMNOPQR STUVWXYZA Aberration – defects in images produced by an optical system caused by limitations in the design and manufacture of the optics. For more information, click here.Astigm...

Sport Optics Glossary of Terms

 ABCDEFGHIJKLMNOPQR STUVWXYZA Aberration – defects in images produced by an optical system caused by limitations in the design and manufacture of the optics. For more information, click here.Astigm...

Solar Safety Warning

Solar Safety Warning

BINOCULARS, MONOCULARS, AND SPOTTING SCOPESSOLAR WARNINGNever look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye damage may result.Never use your optic t...

Solar Safety Warning

BINOCULARS, MONOCULARS, AND SPOTTING SCOPESSOLAR WARNINGNever look directly at the Sun with the naked eye or with this optic. Permanent and irreversible eye damage may result.Never use your optic t...

The Ultimate Guide to Observing Uranus, Neptune, and Pluto

The Ultimate Guide to Observing Uranus, Neptune, and Pluto

Beyond the orbit of Saturn in the cold and dark depths of the outer Solar System lie the giant planets Uranus and Neptune, along with a dwarf planet and the...

The Ultimate Guide to Observing Uranus, Neptune, and Pluto

Beyond the orbit of Saturn in the cold and dark depths of the outer Solar System lie the giant planets Uranus and Neptune, along with a dwarf planet and the...

What are the different types of Prism coatings?

Prism Coating is a multilayer coating to raise transmittance. There are multiple types of prism coatings:Dielectric Coating – a high-reflectivity prism coating that provides high reflectivity acros...

What are the different types of Prism coatings?

Prism Coating is a multilayer coating to raise transmittance. There are multiple types of prism coatings:Dielectric Coating – a high-reflectivity prism coating that provides high reflectivity acros...

What is Twilight Factor and Relative Brightness and how do I Calculate it?

Twilight Factor is a number used to compare the effectiveness of binoculars or spotting scopes used in low light. The larger the twilight factor, the more detail you can see in...

What is Twilight Factor and Relative Brightness and how do I Calculate it?

Twilight Factor is a number used to compare the effectiveness of binoculars or spotting scopes used in low light. The larger the twilight factor, the more detail you can see in...