Tasco Binocular
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 Vintage Tasco Zip Hunting Binoculars 8 by 30 mm UVC Wide Angle Japan 32 oz  US $59.99
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 Vintage Japan 1950 Tasco opera Binoculars US $35.00
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 Tasco Compact binoculars US $.99
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 BINOCULARS TASCO MODEL 105 8x15 50 ZOOM MAGNESIUM BODY US $11.50
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 TASCO BINOCULARS 8X30 with STRAP AND CASE US $9.99
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 Tasco NEW 8x power 21mm objective compact green 4 821GR US $9.99
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 10x25 tasco binoculars US $15.00
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 SUPER 16x40 Outdoor Sports Compact Monocular Telescope US $23.50
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 SUPERB CAMO Quality Army Military 16x40mm Outdoor Compact Monocular FOR XMAS US $19.99
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 BLACK SUPER POWERFUL 16x40 Outdoor Sports Compact Monocular Telescope W CASE US $23.90
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 Tasco Binoculars Model 304 US $14.99
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 Tasco Sonoma SN840 Binocular US $29.99
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 Tasco Zip 103Z Binocular 6x 18x35 Triple Zoom US $39.99
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 Brand New Tasco 168RB Binocular Black Sealed in Package Free Shipping US $49.99
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NEW TASCO 49070800 SPACESTATION 70AZ REFRACTOR TELESCOPE (49070800)
Sale Price: $99.99  |
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Elenco Electronics Science Tech 10 x 25 Binoculars
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Tasco 225x-525x-825x Dome Microscope
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Bushnell Powerview 8x21 Compact Folding Roof Prism Binocular (Black)
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Tasco Essentials 8x21 Binocular (Black)
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How do you evaluate telescope or binocular optics?
Other than price and brand, how do you tell a good quality set of binoculars (or telescope) from bad quality? I'm speaking in terms of optical quality. Without allowing emotion or ego in to your answer, how can I really test the difference between Chinese (Leapers, Tasco, etc) and Japanese or German (or whereever else) binoculars and telescopes?
For quality optics the stars have to be pin-sharp, and the image unobstructed, clear, bright, 'flat' and have good edge to edge sharpness, as well as having good colour transmission.
Cheap optics will show color/chromatic aberrations and image defects and perhaps have a smaller field of view.
With quality optics, the lens coatings should be of good quality, and on all the air-to-glass surfaces.
Cheaper optics will save on these coatings and give a dimmer image.
But having said that even cheap optics nowadays give superb images, and it is quite difficult to tell any difference, (apart from things like BK-7 prisms which are usually used in lower priced binoculars and are inferior to the BAK-4 prisms, and the lens coating or lack of..).
http://en.wikipedia.org/wiki/History_of_telescopes#Achromatic_Telescope
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Tags: astronomy, binocular, binoculars, bushnell, tasco, tasco binocular repair, tasco binoculars, tasco binoculars 7x35, tasco binoculars review, tasco binoculars vintage