TAKAHASHI TPL EYEPIECE 18mm ZenithStar This 5mm extension ring is

This 5mm extension ring is often used for professional field flatteners such as the SharpStar 2

PL3304809 + PL3304809 + PL3304801 + PL3304800

The William Optics GuideStar 61 is an apochromatic guide scope with a focal ratio of f/5

The Series-5XL Focuser requires the Series-5 Controller in order to function

Accessory hand case

TAKAHASHI TPL EYEPIECE 18mm ZenithStar This 5mm extension ring isThe Takahashi TPL 18mm eyepiece provides a 48 degree apparent field of view and extremely sharp on axis performance. Takahashi's TPL series are the definitive standard eyepieces, made in Japan and designed for use with high performance telescope systems where optical clarity is paramount. Stars are very sharp up to half the field of view, gradually swelling to the edge of the field. When combined with a short Barlow, the field is flat to the edge.