{"id":17647,"date":"2026-09-20T18:30:11","date_gmt":"2026-09-20T16:30:11","guid":{"rendered":"https:\/\/deep-space-astronomy.ch\/?post_type=product&p=17647"},"modified":"2026-11-09T09:08:32","modified_gmt":"2026-11-09T08:08:32","slug":"televue-barlow-3x-125-pouce","status":"publish","type":"product","link":"https:\/\/deep-space-astronomy.ch\/en\/product\/televue-barlow-3x-125-pouce\/","title":{"rendered":"Tele Vue 3x Barlow Lens \u2013 1.25 inches"},"content":{"rendered":"

Increase magnification without replacing the entire range of eyepieces<\/h3>\n

The Tele Vue 3x Barlow lens increases the effective focal length of your telescope. Using the same eyepiece, it allows you to achieve a nominal magnification three times greater. This solution complements a selection of eyepieces for exploring lunar details, observing the planets, or zooming in on a specific target. The manufacturer\u2019s part number for this model is BLW-3125<\/strong>.<\/p>\n

A two-element lens<\/h3>\n

The Tele Vue design uses two high-index glass elements and multi-layer coatings. The manufacturer tests its Barlow lenses across the entire field of view using an open system at f\/4. This design is intended to preserve contrast and minimize aberrations introduced into the optical path. The final image quality also depends on the telescope, its focus, and atmospheric conditions: higher magnification does not reveal additional details when turbulence obscures them.<\/p>\n

A convenient 1.25-inch mounting system<\/h3>\n

This model is designed for use with an eyepiece holder and a 1.25-inch threaded eyepiece. Its brass clamping ring distributes the clamping force evenly around the eyepiece to prevent the screw from coming into direct contact with the eyepiece\u2019s thread. The locking screw is captive, and the 1.25-inch filter thread allows you to attach a compatible filter to the mount. Tele Vue specifies a parfocal design intended to minimize focus shift; however, be sure to check the available travel on your instrument.<\/p>\n

Technical specifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
Manufacturer<\/th>\nTele Vue<\/td>\n<\/tr>\n
Reference<\/th>\nBLW-3125<\/td>\n<\/tr>\n
Rated amplification<\/th>\n3x<\/td>\n<\/tr>\n
Flow on the telescope side<\/th>\n1.25 inches (31.75 mm)<\/td>\n<\/tr>\n
Accepted eyepieces<\/th>\n1.25 inches<\/td>\n<\/tr>\n
Optics<\/th>\n2 high-index glass elements<\/td>\n<\/tr>\n
Treatments<\/th>\nMultilayer<\/td>\n<\/tr>\n
Tightening<\/th>\nBrass ring; captive screw<\/td>\n<\/tr>\n
Filter thread<\/th>\n1.25-inch format<\/td>\n<\/tr>\n
Approximate weight<\/th>\nAbout 181 g (0.40 lb, according to the manufacturer)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Making the Right Choice: Frequently Asked Questions<\/h3>\n

What magnification will I get?<\/strong> Magnification is calculated by dividing the telescope's focal length by that of the eyepiece, then multiplying by the nominal factor of 3x. Choose a combination that is appropriate for your telescope's diameter and provides a stable image.<\/p>\n

Is this a Powermate?<\/strong> No. This is a two-element Tele Vue Barlow lens, distinct from the Powermate line. For a photographic setup or an unusual spacing, the actual magnification may depend on the distance between the Barlow lens and the image plane: do not consider the nominal magnification to be a guarantee for every setup.<\/p>\n

Official Tele Vue Documentation on Barlow Lenses<\/a><\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Barlow Tele Vue 3x with a 1.25-inch (31.75 mm) slip-on mount, featuring two multi-coated elements and a brass clamping ring. Includes a 1.25-inch filter thread and a captive locking screw.<\/p>","protected":false},"featured_media":17651,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[629],"product_cat":[369,833],"product_tag":[],"class_list":["post-17647","product","type-product","status-publish","has-post-thumbnail","product_brand-televue","product_cat-barlows","product_cat-en-stock","first","on_supplier","taxable","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product\/17647","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=17647"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media\/17651"}],"wp:attachment":[{"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/media?parent=17647"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_brand?post=17647"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_cat?post=17647"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/deep-space-astronomy.ch\/en\/wp-json\/wp\/v2\/product_tag?post=17647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}