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Aperture: The 70mm aperture is considered small to medium-sized, which means that it can gather a decent amount of light but may not provide the same level of detail and brightness as larger telescopes. However, it's still a good size for beginner and intermediate level observers.
Focal length: The focal length of a 70mm refractor telescope can vary, but is typically in the range of 700-900mm. The focal length determines the magnification of the telescope, with longer focal lengths producing higher magnifications. However, it's important to note that magnification is not the most important factor in observing, and higher magnifications can sometimes result in a darker, fuzzier image.
Mount: 70mm refractor telescopes can come with different types of mounts, including equatorial and altazimuth. Equatorial mounts are more complex to set up but allow for easier tracking of celestial objects as they move across the sky. Altazimuth mounts are simpler to use and more intuitive, but may require more frequent adjustments to keep objects in view.
Accessories: come with accessories such as eyepieces, finderscopes, and tripods. These can vary in quality and usefulness, so it's worth doing some research and reading reviews to ensure that you're getting a good value for your money.
http://www.barrideoptics.com/
