Instrumente Astronomice
Un ghid al incepatorului
Update sectiunea "Binocluri - cat costa si de unde pot fi cumparate"
Emil Neata, 30 martie 2003
Actualizat 5 apr 2003 (Ovidiu Vaduvescu)
Skycraft Canada Inc. (cu sediul probabil in Calgary, Alberta Canada)
Website: http://www.skycraftcanada.com/
Contact: Steve Kirk, email: skycraft@telus.net
ofera binocluri astronomice la preturi destul de accesibile.
La 5 apr 2003 pagina listeaza urmatoarele tipuri (incl si detaliile pt cei fara/cu acces redus online):
200$Can/125$US incl posta pana in Canada sau US (dar nu scrie nimic in alte parti).
Special Features: Light Weight / Long Eye Relief
Magnification: 15x
Objective lens 70mm
Focus System : Center
Field of View: 231/77 (ft@1000yds/M@1000m)
Exit Pupil: 4.4mm
Eye relief: 18.2mm
Prism: Porro BAK4
Weight: 1.45 Kg / 3.2 lbs
Closest focus distance: 20 meters
Includem si urmatoarea imagine.
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205$Can/135$US incl posta pana in Canada sau US (dar nu scrie nimic in alte parti).
Special Features: Light Weight
Magnification: 20x
Objective lens 70mm
Focus System : Center
Field of View: 174/58 (ft@1000yds/M@1000m)
Exit Pupil: 3.2mm
Eye relief: 12mm
Prism: Porro BAK4
Weight: 1.45 Kg / 3.2 lbs
Closest focus distance: 18 meters
Includem si urmatoarele doua imagini: 20x70a.jpg si 20x70b.jpg
Dintr-un email schimbat cu Steve (1 apr 2003), am inteles ca acest model este "out of stock" deocamdata, urmand sa mai primeasca un transport in cateva saptamani.
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270Can$/170US$ incl posta pana in Canada sau US
Special Features: Light Weight / rubber coated
Magnification: 20x
Objective lens 80mm
Focus System : Center Wheel
Field of View: 189/63 (ft@1000yds/M@1000m)
Exit Pupil: 4mm
Eye relief: 16 mm
Coatings: Fully Broadband Multi-coated
Prism: BAK 4 Porro
Weight: 1.6 Kg / 3.52 lbs
Closest focus distance: 26 meters
O cutie portabila este inclusa in pret (imaginea aici). Desi nu scrie explicit de cutie pt toate celelalte tipuri, presupun ca este inclusa (ar trebui vazut exact pe site/intrebat, de asemenea si de snurul = "neck strap" cu care se agata dupa gat - foarte recomandabile ambele!!).
Doua imagini ale binoclului aici: Steve20x80.jpg sau Steve15x70-20x80.jpg (ultimul comparativ cu modelul 15x70).
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270Can$/170US$ incl posta pana in Canada sau US
Special Features: Waterproof
Magnification: 20x
Objective lens 80mm
Focus System : Individual
Field of View: 157/52 (ft@1000yds/M@1000m)
Exit Pupil: 4mm
Eye relief: 15.44mm
Prism: High Quality Porro
Weight: 2.4 Kg / 5.28 lbs
Closest focus distance: 12 meters
O imagine a binoclului aici: Steve20x80-water.jpg
Nu cunosc exact la ce se refera "waterproof" (hidrofor in romaneste) si care ii sunt avantajele practice.
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570Can$/360$US incl posta pana in Canada sau US
Special Features: Waterproof
Magnification: 25x
Objective lens 100mm
Focus System : Individual
Field of View: 157/52 (ft@1000yds/M@1000m)
Exit Pupil: 4mm
Eye relief: 15.44mm
Prism: Porro Prism Design
Weight: 4.7 Kg / 10.3 lbs
Closest focus distance: 20 meters
Cf. Canada Post, probabil posta pana in Romania cu vaporul ar costa cam 100$Can. Desi mai scump, am inclus si acest model pt marimea sa impresionanta: la 25x100mm cu FOV 3 grade acest model este posibil de folosit la cautat/descoperit de comete, cu conditia unui cer intunecat si a unui trepied. Desi mai putin accesibil amatorilor romani, ar putea fi achizitionat insa de cluburi sau mai multi individuali.
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Alte informatii din doua mesaje schimbate cu Steve (3 apr 2003):
- "The binoculars are manufactured in Chinaa and is the same factory that manufacturers Bushnel and other prominent makes."
- Toate modelele NU includ L-adaptor (o barra in forma de L prevazuta cu un surub care intra in binoclu si o piulita care intra in trepied) - o imagine aici. Un L-adaptor la el costa aditional 20$Can/15$US (desi cred ca s-ar putea confectiona destul de usor, eventual la strung).
Alte recomandari/discutii
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