[Hans Tucker (Hans)]

Translated from the Takahashi Japan website:

Up to now, we have been selling standard eyepieces with an apparent field of view of about 50°, including the Abbe series with a 4-piece configuration and the LE series with a 5-piece configuration.
We worked on the design of new eyepieces that would succeed these models, which were no longer in production, and after repeated verification of afocal calculations with various types of eyepieces, we completed Takahashi's original Procell type eyepieces, which are the best in their class. There are many eyepieces with the name "Procel" on the market, but they are a mixture of gems and stones, so unless you actually look into them, you can't judge them by the name "Procel".
The newly released TPL series uses high-refraction and low-dispersion glass to correct central chromatic aberration as much as possible. By design, chromatic aberration is reduced to about half that of the Abbe series and two-thirds that of the LE series, so the image quality of the objective lens is delivered to the eye as is.
In addition, the entire surface of the lens is coated with a multi-layer coating that transmits more than 99% of the entire visible light range, and the hardware construction prevents stray light from entering.

Currently only available in 12,5MM, 18MM and 25MM.

More technical detail and comparison charts against the abbe and LE eyepieces on the Testar website