TeleVue Powermate 4x 2″ Barlow Lens

TeleVue Powermate 4x 2″: Barlow lens: telecentric amplifier from TeleVue

The Powermate 4x in a 2-inch version is built for photographic trains that require a high, stable factor: planetary work with larger cameras, solar photography behind an H-alpha filter, or spectroscopy.

The 2-inch housing keeps the image circle wide, ensuring that the corners remain illuminated even with a larger sensor.

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-4201 T-ring adapter is included, allowing a camera with a T2 mount to screw directly onto the Powermate. Visually, the Powermate pairs well with any eyepiece from the brand.

For whom yes and for whom no

• ✓ Solar and planetary photography with larger cameras
• ✓ As who needs 4x without factor progression
• ✓ Demanding optical trains
• ✗ Visual all-round use
• ✗ Small, slow telescopes

Specifications

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