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Binoculars review

Opticron Countryman 10x42 MC T

Opticron Countryman 10x42 MC T
3 January 2010
Optyczne.pl 
The porro-prismatic Opticron Countryman MC series consists of two instruments with the parameters of 8x42 and 10x42. Both are characterized by high build quality, wide field of view, BaK-4 prisms and affordable price.
Pictures
  • Lornetka Opticron Countryman 10x42 MC T
  • Lornetka Opticron Countryman 10x42 MC T
  • Lornetka Opticron Countryman 10x42 MC T
  • Lornetka Opticron Countryman 10x42 MC T
Manufacturer data

Manufacturer:

Opticron
web site

Distribution / Sales:

Olbrycht Trade sp. z.o.o.
web site

Magnification Lens diameter Angular field of view Prisms Eye relief Weight Price
10 42 106/1000(6.1o) BaK-4/Porro 15 mm 771 g 850 PLN
Results of the review
Real front lens diameter Left:   41.57+/- 0.05 mm
Right:  41.6+/- 0.05 mm
6 / 8.0 pkt
Real magnification 9.78+/- 0.15x 3/3.0
Transmission 90+/- 3% 13/15.0
Chromatic aberration Low in the centre and at the edge. 7.8/10.0
Astigmatism Low. 7.5/10.0
Distortion The distance of the first curved line from the field centre compared to the field of vision radius: 26% +- 3% 2/10.0
Coma Low. 7.9/10.0
Blurring at the edge of the FOV The blur occurs in the distance of 77% +- 4% from the field of view centre. 5/10.0
Darkening at the edge the FOV Slight. 3.6/5.0
Whiteness of the image Minimal yellow. 4/5.0
Collimation Exemplary. 5/5.0
Internal reflections
Left: Right:
Opticron Countryman 10x42 MC T - Internal reflections - Left Opticron Countryman 10x42 MC T - Internal reflections - Right
Visible.
2.7/5.0
Housing Super solid. It seems to be indestructible. Very comfortable to hold but not so comfortable to look through because big eyecups without stops stick into your nose. 6.5/8.0
Focusing Quite comfortable central screw. Classic bridge moves evenly and smoothly. You can sit on it and nothing will happen. Individual focusing a bit too loose and it moves the lens. 3.8/5.0
Tripod There is a comfortable exit. 3/3.0
Interpupilary distance from 58.8 to 72.5mm 3/6.0
Closest focusing distance 3.3 m. 1/2.0
Eyepieces FOV Apparent field of view of 63.2 degrees. 7/10.0
Field of view Measured by us amounted to 6.46 +- 0.03 degrees and it was wider than in the specifications. A wide field for this class. 7.5/8.0
Quality of the interior of the barrels Inner tubes dark and matt; gray bottom with white glue. Minimal specks of dust on the right prism. 3.4/5.0
Vignetting
Left: Right:
Opticron Countryman 10x42 MC T - Vignetting - Left Opticron Countryman 10x42 MC T - Vignetting - Right
Distinctly truncated pupils.
OL: 4.9%, OR: 4.8%.
2/8.0
Prisms quality Very high quality BaK-4. 8/8.0
Antireflection coatings Green on the objectives. Green-purple on the prisms and eyepieces. Low intensity. 5/5.0
Warranty [years] 5 3.5/6.0
Final result
71.3%
41st place in global rank of our 10x42 test.
121.2 / 170 pkt
Econo result 9th place in Econo rank of our 10x42 test 7.7pkt.

Summary

Pros:
  • very good transmission,
  • wide field of view,
  • low coma,
  • low astigmatism,
  • chromatic aberration very well-corrected,
  • good quality of coatings and prisms,
  • good whiteness rendition,
  • solid housing.

Cons:
  • distinctly truncated exit pupils,
  • big and uncomfortable eyecups,
  • too narrow IPD,
  • significant distortion,
  • the image at the edge could have been sharper.


Although the result in the test is far from excellent in my opinion this is a very interesting option – one worth considering the most from the whole Opticron 42 mm class instruments’ offer. The list of cons is a bit long but the pros are definitely more numerous, including good results in many important optical categories. For less than 300 USD we get a set of binoculars with a very wide field of view, put into a solid housing, with good transmission, good whiteness rendition and a very good correction of main off-axis aberrations. In the end, we are presented with a product with a very good price/quality ratio and without artificially limited parameters.