Pentax binoculars: 7 models compared

Pentax has 7 models in the chart, with fields of view from 288 to 429 ft and a median weight of 12.9 oz. 4 of the 7 have eye relief of 16 mm or more.

Top picks

Longest eye relief

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Most popular Pentax with a listing: Pentax SP 8x40

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The SP 8x40 has the widest view of the brand at 429 ft, with a close focus of 20 ft and a weight of 27.2 oz.

Model	Size	Field of view	Eye relief	Close focus	Weight	Exit pupil	Maker list price	Amazon
Pentax SP 8x40	8x40	429 ft	13 mm	20 ft	27.2 oz	5 mm		Check price on Amazon

The Papilio III WR 6.5x21 and 8.5x21 both focus down to 1.6 ft and weigh 10.4 oz, with views of 393 ft and 315 ft.

Model	Size	Field of view	Eye relief	Close focus	Weight	Exit pupil	Maker list price	Amazon
Pentax Papilio III WR 6.5x21	6.5x21	393 ft	15 mm	1.6 ft	10.4 oz	3.2 mm		Check price on Amazon
Pentax Papilio III WR 8.5x21	8.5x21	315 ft	15 mm	1.6 ft	10.4 oz	2.5 mm		Check price on Amazon

The AD 9x28 WP and 9x32 WP are roof prism models, with fields of view of 294 ft and 351 ft.

Model	Size	Field of view	Eye relief	Close focus	Weight	Exit pupil	Maker list price	Amazon
Pentax AD 9x28 WP	9x28	294 ft	18 mm	9.8 ft	12.9 oz	3.1 mm	$200 to $500	Check price on Amazon
Pentax AD 9x32 WP	9x32	351 ft	16 mm	8.2 ft	17.6 oz	3.6 mm	$200 to $500

The SP 8x40 WP has 20 mm of eye relief and a 330 ft field of view, and it weighs 31.7 oz.

Model	Size	Field of view	Eye relief	Close focus	Weight	Exit pupil	Maker list price
Pentax SP 8x40 WP	8x40	330 ft	20 mm	11.5 ft	31.7 oz	5 mm

The AD 8x25 WP has 21 mm of eye relief, the longest of the brand, in a roof prism body of 10.6 oz.

Model	Size	Field of view	Eye relief	Close focus	Weight	Exit pupil	Maker list price
Pentax AD 8x25 WP	8x25	288 ft	21 mm	9.8 ft	10.6 oz	3.1 mm	$100 to $200

The Pentax binoculars with the longest eye relief, from the maker's figures.

Which sizes does Pentax make?

Pentax has 7 binoculars in the chart across 6 sizes: 8x40, 6.5x21, 8.5x21, 9x28, 9x32, 8x25.

Do Pentax binoculars work with glasses?

4 of the 7 Pentax models with a printed figure have 16 mm of eye relief or more, the minimum the RSPB advises for people who wear glasses.

Which Pentax binoculars have the longest eye relief?

The Pentax AD 8x25 WP has 21 mm of eye relief. The SP 8x40 WP follows with 20 mm, and the AD 9x28 WP has 18 mm.