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Astromania 1.25" 7-21mm Zoom Eyepiece for Telescope
Astromania 1.25" 7-21mm Zoom Eyepiece for Telescope
Astromania is a manufacturer and trader specialized in the research, development and production of astronomical instruments with well- equipped testing facilities and strong technical force. Our wide selection of over 500 Astromania accessories at great sale prices will help you get the best performance from your telescope each and every night. From specialty eyepieces and power boosting Barlow lenses to sturdy tripods and protective cases, Astromania has all the accessories you need to get the best performance from your telescope Astromania 1.25" 7-21mm Zoom Eyepiece for Telescope The 7 to 21 millimeters 1.25 inch zoom eyepiece allows you to zoom instantly with your scope from 7x magnification to 21x magnification. ZOOM! 1.25-inch 7-21mm zoom eyepiece will take you up close or far away, depending on your preference. It's precision-manufactured to exacting tolerances and incorporates fully multi-coated optics. Main Features: Super-premium 1.25-inch zoom eyepieceFocal length of 7 to 21 millimetersAllows for expanded magnification optionsFully multicoated opticsFocal length, mm: 7-21Barrel diameter, in: 1.25Apparent field of view: 30°- 43°Eye relief: 16-33Magnification: telescope focal length / eyepiece focal length Read more The Zoom Series meets the standards of modern telescopes. This 5 element design offers excellent contrast due to good edge density. Zoom Series eyepieces are specially corrected for aberration and colour defects and offer comfortable eye relief. Scattered light is eliminated by the rubber eyecups, and a firm grip is provided. This eyepiece also has a groove which prevents the eyepiece from falling out of the focuser. The optics are made of high- quality glass that provides incredible sharpness, clarity and vividness of the image.The scale engraved on the shell allows you to easily and quickly set the focal length you need within the 7-21-mm range. Zoom Eyepiece you can change the focal length during your observation without actually changing the eyepiece.It can replace several conventional eyepieces. That's why these varied focal-length eyepieces are so popular among amateur stargazers. Thanks to the twist-up rubber eyecup you can use this filter even if you wear glasses. Read more The advantages of the zoom eyepiece: Comfortable viewing at every focal length setting - superior to most fixed focal length eyepieces, especially at the shorter focal length settingsPrecise and stepless adjustment from 7mm to 21mmExcellent contrast and sharpness - making the zoom also of interest for planetary observingThe particularly large eye lens coupled with the long eye relief means the Zoom provides particularly good viewing comfortThe eyecup can folded down - handy for spectacle wearers Read more
- A twist of the zoom eyepiece housing changes focal length from 21mm to 7mm, providing a variety of viewing magnification powers. Excellent contrast and sharpness - making the zoom also of interest for planetary observing.
- Exceptionally long 16mm-to-33mm eye relief range allows eyeglass wearers to enjoy the entire view while still wearing their corrective lenses without vignetting. The Zoom eyepiece lets you change magnification power without physically changing eyepieces.
- Apparent field of view is 30- degree at 21mm and 43- degree at 7mm. Rubber traction ring ensures a good grip. The 1.25" barrel is threaded for filters. Actual magnification range will depend on the focal length of your telescope. It works equally well for astronomical or terrestrial viewing.
- Eyepiece consists of four elements which are fully coated with anti-reflection coatings for clear, high contrast views. The particularly large eye lens coupled with the long eye relief means the Zoom provides particularly good viewing comfort, the eyecup can folded down - handy for spectacle wearers.
- Comfortable viewing at every focal length setting - superior to most fixed focal length eyepieces, especially at the shorter focal length settings, precise and stepless adjustment from 7mm to 21mm. A nice value in a quality zoom eyepiece!
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