{"id":107749,"date":"2026-04-29T16:58:00","date_gmt":"2026-04-29T14:58:00","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=107749"},"modified":"2026-07-20T12:33:05","modified_gmt":"2026-07-20T10:33:05","slug":"tele-vue-powermate-2-5x-125-barlow-lens","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/televue-powermate-25x-125-barlowlens\/","title":{"rendered":"TeleVue Powermate 2.5x 1.25\" - Barlow Lens"},"content":{"rendered":"

TeleVue Powermate 2.5x 1.25\" : Barlow Lens: Telecentric Magnifier by TeleVue<\/strong><\/h2>\n\n\n\n

The Powermate 2.5x is the most versatile component of the line: high enough to lift a mid-power eyepiece into planetary range, low enough to remain useful with variable seeing.<\/p>\n\n\n\n

For planetary photographers using an f\/5 to f\/8 telescope, the 2.5x brings the f-ratio into the range where common planetary cameras find their image scale.<\/p>\n\n\n\n

\"TeleVue<\/figure><\/figure>\n\n\n\n

Telecentric instead of Barlow<\/h4>\n\n\n\n

A Powermate is not a Barlow. Behind the negative front group is a second, positive group that makes the light beam parallel again. The result: the magnification factor remains practically constant, regardless of what is behind it and at what distance.<\/p>\n\n\n\n

A classic Barlow lens changes its magnification as the distance to the sensor or eyepiece increases and shifts the eyepiece's exit pupil. The Powermate does neither of these, making it suitable for long optical trains and for photography.<\/p>\n\n\n\n

For planet photography<\/h4>\n\n\n\n

For moon and planet imaging with a video camera, the image scale determines the detail. The Powermate brings the f-ratio to the level that matches the camera's pixel size, with a predictable, fixed factor.<\/p>\n\n\n\n

With the matching T-ring adapter, you screw a camera directly onto the Powermate, without loose adapters in the train.<\/p>\n\n\n\n

Featured accessories<\/h3>\n\n\n\n

For photography, the PMT 1.25-inch T-ring adapter is included, allowing a camera with a T2 mount to screw directly onto the Powermate. Visually, the Powermate is compatible with any eyepiece from the merk series.<\/p>\n\n\n\n

For whom yes and for whom no<\/h3>\n\n\n\n