Binoculars review

Olympus 10x42 EXWP I

Olympus 10x42 EXWP I
20 April 2010
The EXWP-I series consists of the most expensive Olympus binoculars and includes two instruments with the parameters of 8x42 and 10x42. Both of them are roof prism binoculars made of BaK-4 glass and phase correction coated. All other optical elements are covered by antireflection multilayer coatings and additional UV coatings.

The binoculars is padded with high quality rubber, watertight and nitrogen-filled. The housing is very stylish and convenient to hold. In the Design category it even won the IF 2003 award.

The manufacturer informs us that, apart from the prisms, there are overall 9 lenses in 6 groups in the system. The lenses are made of lead-free glass.

All the Olympus binoculars have a case, a strap and objective cups included in box. The EXWP-I series comes with a 25-year-long guarantee.

  • Lornetka Olympus 10x42 EXWP I
  • Lornetka Olympus 10x42 EXWP I
  • Lornetka Olympus 10x42 EXWP I
  • Lornetka Olympus 10x42 EXWP I
Manufacturer data


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Magnification Lens diameter Angular field of view Prisms Eye relief Weight Price
10 42 105/1000(6o) BaK-4/Dachowe 15 mm 660 g 1499 PLN
Results of the review
Real front lens diameter Left:   42+/- 0.05 mm
Right:  42+/- 0.05 mm
8 / 8.0 pkt
Real magnification 9.88+/- 0.15x 3/3.0
Transmission 86+/- 3% 13.5/25.0
Chromatic aberration Slight in the centre and at the edge. 7.5/10.0
Astigmatism Very appropriately corrected. 7.5/10.0
Distortion The distance of the first curved line from the field centre compared to the field of view radius : 90% +\- 3% 10/10.0
Coma Low. 7.5/10.0
Blurring at the edge of the FOV The blur occurs in the distance of 78% +\- 3% from the field of view centre. 5/10.0
Darkening at the edge the FOV Very low. 4.2/5.0
Whiteness of the image Minimally yellow. 4.3/5.0
Collimation Perfect. 5/5.0
Internal reflections
Left: Right:
Olympus 10x42 EXWP I - Internal reflections - Left Olympus 10x42 EXWP I - Internal reflections - Right
Housing Comfortable and very solid. The rubber of very high quality, nice to the touch. Regulated eyecups with a slight tendency to extending. 7.5/8.0
Focusing Very convenient central screw. Quite comfortable ring on the right eyepiece. The outer lens moves. 4.7/5.0
Tripod There is a convenient exit. 3/3.0
Interpupilary distance from 58.5 to 74mm 5/6.0
Closest focusing distance 1.8 m. 2/2.0
Eyepieces FOV Apparent field of view of 60.3 deg (according to simple formula) and 55.5 deg (according to tangent formula). 11/20.0
Field of view Measured by us amounted to 6.10 +\- 0.04 degrees and it was by 0.1 degrees wider than that given in the specifications. 5.5/8.0
Quality of the interior of the barrels Dark but only moderately matt. Gray bottom not very visible. Microscopic flecks of dust. 4.5/5.0
Left: Right:
Olympus 10x42 EXWP I - Vignetting - Left Olympus 10x42 EXWP I - Vignetting - Right
Egg-shaped pupils.
OL: 6.5%, OR: 1.6%.
Prisms quality High quality BaK-4. 8/8.0
Antireflection coatings Blue-green-yellow on objectives. Green-purple on eyepieces and prisms. Low intensity. 5/5.0
Warranty [years] 25 5/6.0
Final result
10th place in the overall ranking of the 10x42 binoculars test.
144.1 / 190 pkt
Econo result 3rd place in the econo ranking of the 10x42 binoculars test. 16.3pkt.


  • very solid and stylish housing,
  • coma and astigmatism very well corrected,
  • negligible distortion,
  • low chromatic aberration,
  • very good whiteness rendition,
  • good quality of prisms and coatings,
  • low flares,
  • slight light fall-off at the edge,
  • good blackening inside,
  • minimal focus already from 1.8 meters,
  • long warranty period.

  • distinctly truncated exit pupils.

Decidedly this was the dark horse of out test. Plenty of advantages, just one serious flaw and the price of 400 Euro are the best of recommendations. A standing ovation for Olympus, which managed to launch an almost perfect nature observation instrument and you don’t have to pay an arm and a leg for it.

The Allbinos.com/Optyczne.pl editorial team decided to award this set of binoculars the “A good buy according to the Allbinos.com/Optyczne.pl Editorial Team” distinction for winning the 3rd place in the 10x42 binoculars Ekono ranking