Pentax XW 20mm 70° Eyepiece

£249.00

(2 Reviews)

✓ 2 year warranty

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About this product

Model: PentaxXW20
Part Number: 70516

A premium quality low-medium magnification wide-field eyepiece.

Features

High-refraction, low-dispersion Lanthanum glass.
Pentax Super Multi-Coatings (SMC) on all air/glass surfaces.
Edge-blackened optics and optimised baffles minimise internal reflections.
Optically corrected for use with focal ratios as fast as f/4.
20mm eye-relief and twist-up rubber-rimmed eyecups - perfect for spectacle wearers.
Chromed barrels threaded to accept filters.
Weatherproof to JIS Class 4 standards.

Lens Structure:

6 elements, 4 groups

Focal Length:

20mm

Apparent Field of View:

70 degrees

Eye Relief:

20mm

Attachment Diameter:

1.25" (31.7mm)

Filter Diameter:

28.6mm

Field Stop Diameter:

24.0mm

Eyepiece Ring:

Helicoid type

Height & Width:

3.4" x 2.4"

Weight:

12.6 oz. (355g)

Eyepiece Field of View Simulator

Customer reviews

Average Rating (2 Reviews):

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Rating (max 5):

Pentax Eyepiece review

04 January 2019 | Mike

As yet I have had only one chance to use the Pentax xw 20mm, this was with an Equinox 120 refractor. Views of the moon had wonderful contrast and crispness out to the edge of the field of view.
Extreemly comfortable eye piece to use, with a flat field and no visable false colour. The best eyepiece I have ever used, in fact I have just ordered the 14mm as well.
Cant wait for clear skys.

Rating (max 5):

Fantastic eyepieces

27 July 2018 | Derek

I recently completed a whole set of Pentax XWs which I have been using for both dark sky and Solar observing and I must say I love them. The views are fabulous with great contrast and sharpness and the ergonomics of the design make these very easy to use and relatively light compared to similar quality eyepieces from other manufacturers. Great value.