This is my new OTA, designed and recently built by Roland Christen from Astro-Physics. It is an 167 mm, f7.2, fluorite triplet, built from a chunck of fluorite that originated at Zeiss's APQ optical shop before it was shut down. Hence, I decided to call it an AP167 FLZ! It is a beautiful instrument, based on the same mechanics as the AP175 series, 4" focuser and all. At its side sits the massive, custom made, 4" flattener.
