{"id":18037,"date":"2026-09-28T10:27:04","date_gmt":"2026-09-28T08:27:04","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=18037"},"modified":"2026-11-14T11:45:30","modified_gmt":"2026-11-14T10:45:30","slug":"takahashi-tka31582","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/takahashi-tka31582\/","title":{"rendered":"Takahashi 35FL: 50.8 mm field corrector for TSA\/TOA"},"content":{"rendered":"

Flattening the field of TSA and TOA glasses<\/h3>\n

The Takahashi 35FL corrector, part number TKA31582, is designed for TSA and TOA triplet refractors. Takahashi specifically lists the TSA-120 and TOA-130NS for imaging at their native focal lengths. The purpose is to correct the field curvature of these instruments, not to turn the corrector into a universal adapter for any telescope.<\/p>\n

A 40-mm image circle<\/h3>\n

The manufacturer specifies a corrected image circle of 40 mm and describes this corrector as suitable for users of APS-C sensors. For a larger sensor, verify the desired coverage rather than assuming full-frame compatibility based solely on the 2-inch thread. Sensor size and viewfinder configuration remain selection criteria distinct from the mechanical interface.<\/p>\n

Two interfaces with a 50.8 mm pitch<\/h3>\n

The inlet is a 2-inch male slip-on connection, and the outlet is a 2-inch female slip-on connection. An M48 thread is specified for mounting a filter; no additional thread pitch is implied by this specification alone. This design allows for a slip-on connection; please verify compatibility with the fittings in your camera system.<\/p>\n

Calculate the distance to the sensor<\/h3>\n

The specified mechanical backfocus is 117.5 mm. This should not be confused with the 38 mm flange focal distance, nor with the 74 mm overall length listed in the table. The mechanical diameter is 60 mm and the weight is 200 g. Before assembling the camera, rings, or other accessories, check their dimensions against the intended setup. The inclusion of additional adapters is not specified here: the corrector alone does not prove that a camera adapter is included.<\/p>\n

Technical specifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Features<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Reference<\/th>\nTKA31582<\/td>\n<\/tr>\n
Corrected image circle<\/th>\n40 mm<\/td>\n<\/tr>\n
Mechanical backfocus<\/th>\n117.5 mm<\/td>\n<\/tr>\n
Mechanical Input Interface<\/th>\n2\" (50.8 mm) male coupler<\/td>\n<\/tr>\n
Mechanical Output Interface<\/th>\n2\" (50.8 mm) female spout<\/td>\n<\/tr>\n
Circulation<\/th>\n38 mm<\/td>\n<\/tr>\n
Mechanical diameter<\/th>\n60 mm<\/td>\n<\/tr>\n
Mechanical Length<\/th>\n74 mm<\/td>\n<\/tr>\n
Weight<\/th>\n200 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Manufacturer's source<\/h3>\n

View the Takahashi product page for the 35FL Field Corrector (TSA\/TOA)<\/a>.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Takahashi 35FL Field Corrector for the TSA-120 and TOA-130NS. 40 mm corrected image circle, 50.8 mm slip-on interfaces, and 117.5 mm mechanical back focus.<\/p>","protected":false},"featured_media":18034,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[947],"product_cat":[650],"product_tag":[],"class_list":["post-18037","product","type-product","status-publish","has-post-thumbnail","product_brand-takahashi","product_cat-rducteurs-correcteurs-ap","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/18037","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=18037"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/18034"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=18037"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=18037"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=18037"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=18037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}