7 Best Telescopes (2026 Review Guide)

Refractors use lenses and are sealed tubes, so they require almost no maintenance and deliver sharp, high-contrast views – making them the more practical starting point for most beginners. Reflectors use mirrors, which can shift out of alignment and need periodic recollimation, but they offer significantly more aperture per dollar, which matters when you want to see faint deep-sky objects. If you plan to observe planets and the moon, a refractor is simpler to manage; if you want to push into galaxies and nebulae on a limited budget, a reflector gives you more light-gathering power for the money.

Apochromatic refractors use three or more specialized glass elements to bring multiple wavelengths of light to the same focal point, which eliminates the purple fringing (chromatic aberration) that achromats produce around bright objects like the moon and Venus. The price gap is substantial – a quality APO often costs three to five times more than a comparable achromat – so the upgrade is worth it primarily for astrophotographers and observers who find color fringing genuinely distracting. Visual observers on a budget can live with the mild aberration in an achromat, especially at longer focal ratios like f/8 or above where the effect is reduced.

Aperture determines how much light the telescope collects, which directly controls what you can see – a 10-inch Dobsonian will reveal galaxies and nebula detail that an 80mm refractor simply cannot show. The trade-off is that larger aperture means more weight and bulk, and a telescope that stays in a closet because it's inconvenient to set up is less useful than a smaller one you use every clear night. A practical rule: if you have a fixed observing spot or dark-sky site you drive to regularly, prioritize aperture; if you need something that sets up in under five minutes on a balcony or travels in carry-on luggage, cap yourself at 90 – 102mm for a refractor or a compact 5-inch Mak-Cass.

Many buyers prioritize maximum magnification – sometimes advertised as 400x or 600x on budget scopes – over aperture, when in practice a telescope's usable magnification caps out at roughly 50x per inch of aperture under good atmospheric conditions. Beyond that limit, images become dim, soft, and shaky rather than more detailed, so a 60mm refractor marketed as '500x power' is essentially misleading you. The number that actually predicts what you'll see is aperture in millimeters, not the highest eyepiece magnification you can achieve.

Most modern telescopes use either a 1.25-inch or 2-inch focuser barrel – 1.25-inch is the near-universal standard for entry-level and mid-range scopes, while 2-inch focusers appear on larger Dobsonians and premium refractors and accept wider-field eyepieces. If you own eyepieces already, check the barrel diameter stamped on them before buying a new telescope; a 2-inch focuser almost always includes a 1.25-inch adapter so your existing eyepieces will fit, but a 1.25-inch focuser cannot accept 2-inch eyepieces. Astrophotography users also need to verify the focuser's drawtube diameter and back-focus distance before purchasing a camera adapter or reducer.

Reflector mirrors typically need recollimation – realigning the mirror angle – every few months of regular use or after any rough transport; this takes about 10 minutes once you've learned the process. The mirror coatings on a well-cared-for reflector last 10 to 20 years before reflectivity noticeably degrades, at which point recoating services typically cost $50 – $150 depending on mirror diameter. Refractor lenses are sealed and need no collimation; they can last decades with no maintenance beyond keeping the caps on when not in use and occasionally wiping the eyepiece lens with a clean optical cloth.