{"id":17976,"date":"2026-09-28T04:34:17","date_gmt":"2026-09-28T02:34:17","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=17976"},"modified":"2026-11-14T11:17:29","modified_gmt":"2026-11-14T10:17:29","slug":"takahashi-tka00441-accessoire","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/takahashi-tka00441-accessoire\/","title":{"rendered":"Takahashi TKA00441: 31.75 mm collimation eyepiece"},"content":{"rendered":"

A guide for aligning the mirrors<\/h3>\n

The Takahashi collimation eyepiece fits into the 31.75 mm slip-on eyepiece holder. It has no lens and features a small central hole that positions the eye on the optical axis. The reflections from the optical surfaces then serve as reference points for checking the geometric alignment of the mirrors.<\/p>\n

Illuminate the reference surface<\/h3>\n

A side opening illuminates a reflective, metallized surface. The procedure is typically performed during the day or at dusk; at night, the manufacturer recommends illuminating the instrument\u2019s entrance and\/or this surface. The accessory is not intended to be used as a standalone light source.<\/p>\n

Uses and Construction<\/h3>\n

This tool is used for collimating Newtonian telescopes\u2014particularly those mounted on Dobsonian mounts\u2014and for adjusting the secondary mirror on Cassegrain and Ritchey-Chr\u00e9tien telescopes. The Takahashi model is machined from aluminum and manufactured in Japan. Follow the procedure appropriate for your instrument before making any adjustments.<\/p>\n

Technical specifications<\/h3>\n\n\n\n\n\n\n\n\n
Takahashi TKA00441: 31.75 mm collimation eyepiece<\/caption>\n
Features<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Reference<\/th>\nTKA00441<\/td>\n<\/tr>\n
Mechanical Input Interfaces<\/th>\n1.25\" (31.75 mm) male fitting<\/td>\n<\/tr>\n
Dimensions<\/th>\nHeight: 45 mm. Diameter: 35 mm<\/td>\n<\/tr>\n
Weight<\/th>\n45 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Components of this item<\/h3>\n

TKA00441 collimation eyepiece only. The TKA00442 collimation tube and any light source are not included in the package.<\/p>\n

Reference: TKA00441. Takahashi's Official Profile<\/a>.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Takahashi collimation eyepiece without a lens, with a 31.75 mm thread. Center mark and side opening for illuminating the reflective surface.<\/p>","protected":false},"featured_media":17971,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[947],"product_cat":[823],"product_tag":[],"class_list":["post-17976","product","type-product","status-publish","has-post-thumbnail","product_brand-takahashi","product_cat-collimation","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/17976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/comments?post=17976"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/17971"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=17976"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=17976"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=17976"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=17976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}