TeleVue 3x 1.25" Barlow Lens

TeleVue 3x 1,25″ : barlowlens: barlowlens van TeleVue

The TeleVue 3x Barlow triples the magnification, making it the shortest route to high planetary reach. A 15mm eyepiece becomes an effective 5mm, while maintaining the 15mm's generous eye relief.

It's precisely that combination that makes the 3x interesting: high magnification with the viewing comfort of a medium-length eyepiece.

What a good Barlow does

A Barlow lens extends the effective focal length of your telescope, thereby increasing the magnification of any eyepiece inserted into it. Two eyepieces plus a Barlow lens thus cover four magnifications.

The quality of the glass determines whether you get it for free or pay for it with contrast. TeleVue uses high-refraction glass with multiple coatings; the difference with the eyepiece alone is not visible in practice.

Effect on eye distance

A classic Barlow lens slightly increases the eye relief of short eyepieces. This is welcome with a Plössl: a 15mm with a Barlow has more comfortable eye relief than a standalone 7.5mm.

If you want a magnification factor that has no effect on the eye relief or exit pupil, the telecentric Powermate is the alternative within the merk series.

Featured accessories

Combine the Barlow with the TeleVue Ploessls for a compact set that covers four magnifications. The eyepieces are parfocal, so switching requires minimal refocusing.

For whom yes and for whom no

• ✓ Planet detail with comfortable eyepieces
• ✓ Those who want high magnifications without short eyepieces
• ✓ Telescopes with a long f-ratio are rarely discussed: short tubes actually benefit
• Who already has a 5 mm eyepiece
• ✗ Deep-sky survey

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.