Triplet Refracting Telescopes, or Triplets, as they are commonly referred to, are telescopes with 3 lenses. When compared to doublets, these are more expensive because they tend to be much better at color correction and will give the user a much cleaner view. Triplets are also classified as apochromatic telescopes. If you plan to get deeper into the hobby of astronomy, Triplet Refractors are a great way to go. Their use of 3 lenses make for a much better user experience. Triplets are generally very easy to use and are known as one of the best types of refracting telescopes on the market.