They can also come in a variety of sizes, some of which can get quite large. Reflector telescopes can provide great value and offer many conveniences.
This is especially true for Dobsonians, which come with their own easy-to-use rocker-box mount. If you’re looking for more bang for your buck in terms of aperture, reflectors are a great way to go. It’s relatively common for reflectors to be less expensive than refractors since manufacturing large mirrors is usually more affordable than manufacturing large lenses.Īdditionally, reflector telescopes are not susceptible to color fringing in the same way that doublet refractors are. This secondary mirror reflects the light toward the eyepiece or CCD. These mirrors reflect light at various angles within the optical tube, extending the overall light path.Ī reflector consists of a primary mirror located at the opposite end of the telescope from the aperture and a smaller secondary mirror near where the reflected light converges. Whereas refractors use lenses, reflectors use mirrors. Chromatic aberration (can be corrected with apochromatic telescopes).A closed system means low maintenance and very little cleaning.Their non-movable lenses make for a sturdy design that doesn’t need much maintenance beyond the occasional cleaning. Still, whether a doublet or triplet, refractors are solidly built scopes. Most low-cost refractors are “doublets,” which may have color fringing, whereas “triplet” refractors are designed to eliminate this issue this three-lens system is referred to as an apochromatic refractor telescope. To the observer, the image will contain distinct coloration at the edges. When these enter the lens, they split from each other and arrive at slightly different angles. Specifically, a wave of light contains many different wavelengths. One drawback of refractors is chromatic aberration, which is color fringing caused by the fact that different wavelengths of light are refracted at different angles by the same lens. REFRACTOR TELESCOPES AND CHROMATIC ABERRATION
#Teles copio refrector portable
For this reason, most refractors tend to be smaller-aperture models, making refracting telescopes one of the most portable telescopes on the market.Ī good beginner refractor is the Celestron PowerSeeker 80EQ telescope, which is great for both celestial and terrestrial viewing. The length and size of the lens of a refractor, combined with the fact that large lenses can be difficult and expensive for glassmakers to manufacture at high quality, means that larger refractors can get rather expensive. The objective lens is located near the far end of the telescope tube, and the larger the lens, the longer the optical tube must be to bring the image into focus.
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