TeleVue Powermate 2.5x 1.25" - Barlow Lens

TeleVue Powermate 2.5x 1.25" : Barlow Lens: Telecentric Magnifier by TeleVue

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.

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.

Telecentric instead of Barlow

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.

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.

For planet photography

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.

With the matching T-ring adapter, you screw a camera directly onto the Powermate, without loose adapters in the train.

Featured accessories

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.

For whom yes and for whom no

• ✓ Planet photography with a medium-speed telescope
• ✓ Visual use without loss of eye distance
• ✓ For those who need a constant factor
• If you only double visually occasionally, the 2x Barlow is more advantageous

Specifications

More eyepieces and Barlows are on the Accessory page for eyepieces and Barlows. You can find the complete selection of this merk on the TeleVue merk Page.