TAKAHASHI TOA-130NFB ORTHO-APO TRIPLET Focusing motor such as a Schmidt-Cassegrain

such as a Schmidt-Cassegrain

which is recommended for removing the banding caused by Newton's rings

The reduction of the optical length was measured with the 2" focuser of a Traveler 105mm/f6 Apochromat with a pair of 35mm ED eyepieces

75 T-ring (sold separately)

TAKAHASHI TOA-130NFB ORTHO-APO TRIPLET Focusing motor such as a Schmidt-CassegrainThe Takahashi TOA 130NFB is an Ortho Apochromatic triplet refractor with the highest possible correction of any refractor on the market. The unique optical configuration based on a highly air spaced triplet completely eliminates spherical aberration while having the best chromatic correction in the Takahashi range. With two S FPL53 ED elements, the air spaced triplet lens cell has a Strehl ratio of 99. 8% at the optimal wavelengths of human vision.