lens-specifications

Specifications:20-140x, Field of View (ft@1000yds/m@1000m) =54/18@20x, Prism Glass: BAK-4, Exit Pupil (mm): 4.0, Close Focus (ft/m) 87/29, Eye Relief 21mm References :Field of view: Definition from Answers.comStar map | Define Star map at Dictionary.comPerseus Constellation: Myth Stars Deep Sky Objects CometsSpot stars with our guide to astronomy – BBC

Continue Reading BARSKA Gladiator 20-140×80 Zoom Binoculars (Green Lens)

Specifications:8-24x, Area of View (foot@1000yds/m@1000) =225/75@8x, Prism Glass: BK-7, Exit Pupil (mm): 5.6, Close Focus (foot/m) 21.32/65, Eye Relief 20.0mm References :Neil de Grasse Tyson: Biography from Answers.comtelescopes and binoculars: Information from Answers.comTELESCOPES.COM (Meade Star Chart) – YouTubeRadio-astronomy encyclopedia topics | Reference.com

Continue Reading BARSKA Gladiator 8-24X50 Zoom Binoculors (Ruby Lens)

Specifications:7-20x, Field of View (ft@1000yds/m@1000m) =294/98@7x~162/54@20x, Prism Glass: BK-7, Exit Pupil (mm): five-1.7, Close Focus (ft/m) 32/10, Eye Relief (mm) 14@7x References :Star Charting Apps for iPhone/iPod TouchNight star chart encyclopedia topics | Reference.comZhumell Tachyon 25×100 Astronomy Binoculars – Yahoo! GroupsAstronomy Information – I Have A Plan Iowa ™ – Cluster Article

Continue Reading BARSKA Escape Porro 7-20×35 Zoom Binoculars (Green Lens)

Specifications:10-30x, Field of View (ft@1000yds/m@1000m) =186/62@10x-102/34@30x, Prism Glass: BK-7,Exit Pupil (mm):6-2, Close Focus (ft/m) 42/13, Eye Relief (mm) 14@10x References :OpticsPlanet Proud to Announce Status as a Celestron Top 10 …How to Spot New Supernova in Nearby Galaxy – Technology …Binoculars – Wikipedia the free encyclopediaastronomical telescope – Dictionary.com – Reference.com

Continue Reading BARSKA Escape Porro 10-30×60 Zoom Binoculars (Green Lens)

Specifications:20x, Field of View (ft@1000yds/m@1000m) =174/58, Prism Glass: BK-7, Exit Pupil (mm): 5, Close Focus (ft/m) 32/10, Eye Relief (mm) 8 References :Thesky (astronomy software) encyclopedia topics | Reference.comSagittarius: Information from Answers.comSchmidt telescope | Define Schmidt telescope at Dictionary.comNight star chart encyclopedia topics | Reference.com

Continue Reading BARSKA Escape Porro 20×50 Binoculars (Green Lens)

Specifications:9x, Field of View (ft@1000yds/m@1000m) =273/91, Prism Glass: BK-7, Exit Pupil (mm): 6.3, Close Focus (ft/m)26.24/8.0, Eye Relief 23.0mm References :Dunhuang Star Chart – Wikipedia the free encyclopediaHow to Get Started in Amateur Astronomy: 12 steps (with pictures …Skywatching misconceptions explained – Technology & science …Greatest Astronomy Discoveries – YouTube

Continue Reading BARSKA Blackhawk 9×63 Binoculars (Green Lens)

Specifications:10x, Field of View (ft@1000yds/m@1000m) =366/122, Prism Glass: BK-7, Exit Pupil (mm):5, Close Focus (ft/m) 32/10, Eye Relief 20mm References :Whirlpool Galaxy – Wikipedia the free encyclopediaGeo-location apps to star at South by Southwest – USATODAY.comThesky (astronomy software) encyclopedia topics | Reference.comSWOSU | Academics | Physics | Astronomy | Star Chart Exam

Continue Reading BARSKA Escape Porro 10×50 Binoculars (Green Lens)

Specifications:25-125x, Area of View (foot@1000yds/m@1000) =4/18@25x, Prism Glass: BAK-, Exit Pupil (mm): ., Close Focus (foot/m) 82/25, Eye Relief 13.3mm BARSKA Gladiator 25-125×80 Zoom Binoculors (Eco-friendly Lens, Braced-in Tripod Adapter) References :Great Basin National Park – Astronomy (U.S. National Park Service)Telescope BinocularsWhere can I find good star charts online? – Yahoo! AnswersChristmas Star Events Proven [...]

Continue Reading BARSKA Gladiator 25-125×80 Zoom Binoculors (Green Lens,