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Binoculars review

Meopta Meostar B1 10x42

Meopta Meostar B1 10x42
8 February 2010
Optyczne.pl 
The binoculars from the Meostar B1 series are the newest product offered by the Czech Meopta company, launched at the beginning of 2005. The series includes nine roof prism models with the following parameters: 8x32, 10x32, 7x42, 8x42, 10x42, 7x50, 10x50, 12x50 and 8x56.

All the Meopta Meostar binoculars are waterproof and nitrogen-filled. The prisms are made of the BaK-4 glass and all the air-to-glass surfaces are covered by antireflection multi-coatings of the highest quality. The binoculars have a good quality rubber armour and comfortable, twist-up eyecups.

Pictures
  • Lornetka Meopta Meostar B1 10x42
  • Lornetka Meopta Meostar B1 10x42
  • Lornetka Meopta Meostar B1 10x42
  • Lornetka Meopta Meostar B1 10x42
Manufacturer data

Manufacturer:

Meopta
web site

Distribution / Sales:

Knieja
web site

Magnification Lens diameter Angular field of view Prisms Eye relief Weight Price
10 42 110/1000(6.3o) BaK-4/roof 15 mm 877 g 2890 PLN
Results of the review
Real front lens diameter Left:   42.05+/- 0.05 mm
Right:  42.07+/- 0.05 mm
8 / 8.0 pkt
Real magnification 9.7+/- 0.25x 3/3.0
Transmission 85+/- 3% 11/15.0
Chromatic aberration Slight. 7/10.0
Astigmatism Low. 7.1/10.0
Distortion The distance of the first curved line from the field centre compared to the field of vision radius: 34% +\- 4% 3/10.0
Coma Slight. 7.1/10.0
Blurring at the edge of the FOV The blur occurs in the distance of 87% +\- 3% from the field of view centre. 7/10.0
Darkening at the edge the FOV Negligible. 4.7/5.0
Whiteness of the image Distinct hue of warm yellow. 2.4/5.0
Collimation Negligible. 5/5.0
Internal reflections
Left: Right:
Meopta Meostar B1 10x42 - Internal reflections - Left Meopta Meostar B1 10x42 - Internal reflections - Right
Low.
4/5.0
Housing Very solid, compact and comfortable at the same time. Regulated eyecups with a bit too much grease. 7.4/8.0
Focusing Two screws in one. Very comfortable. Nothing moves outside. 4.8/5.0
Tripod Is slightly too difficult to reach. 2.5/3.0
Interpupilary distance from 54.7 to 73.5mm 4/6.0
Closest focusing distance 2.35 m 1.5/2.0
Eyepieces FOV Apparent field of view of 61 degrees. 7/10.0
Field of view Measured by us amounted to 6.29 +\- 0.03 degrees and was in perfect accordance with the specifications. 6.5/8.0
Quality of the interior of the barrels Inner barrels black and matt. Areas near prisms gray. Bottom slightly shiny. Microscopic specks of dust on the prisms. 4.1/5.0
Vignetting
Left: Right:
Meopta Meostar B1 10x42 - Vignetting - Left Meopta Meostar B1 10x42 - Vignetting - Right
No. OL: 0.0%, OR: 0.0%
8/8.0
Prisms quality High quality BaK-4. 8/8.0
Antireflection coatings Green-pink on the objectives. Pink on the prisms. Green-pink-blue on the eyepieces. Low intensity. 5/5.0
Warranty [years] 3 3/6.0
Final result
77.1%
18th place in the overall ranking of the 10x42 binoculars test.
131.1 / 170 pkt
Econo result 39th place in the econo ranking of the 10x42 binoculars test -2.1pkt.

Summary

Pros:
  • very solid housing,
  • slight astigmatism,
  • quite low coma,
  • chromatic aberration well corrected,
  • relatively sharp image in the whole field of view,
  • low light fall-off at the edge of the field,
  • low flares,
  • perfectly circular exit pupils,
  • good blackening inside the binoculars,
  • good quality of coatings and prisms.

Cons:
  • distinctly yellow image,
  • too high distortion,
  • big difference in transmission between the right and the left inner tube,
  • short warranty period for this price segment.


The Meopta Meostar is undoubtedly a good, solid set of binoculars. If it has several vices, they are partially connected with the past of the factory where it was made. We mean here lousy whiteness rendition. Binoculars produced in the Eastern Bloc countries have always shown a yellow image, the most probably because of antireflection coatings which transmission was the highest in the yellow part of the spectrum. Unfortunately the Czech Meopta hasn’t got rid of this problem and still can’t manufacture optics with the correct colour rendition. The second interesting problem was an over 10% difference in transmission between the right and the left barrel. Significantly lower level of transmission was noted for the right tube with the additional individual focusing mechanism and perhaps that mechanism was the reason of lowering the optical prowess. The third serious flaw was the level of distortion which is too high.

After these words of criticism there’s time for praise. First thing that sticks out is the solid greenish casing, which, when it comes to style and look, resembles a bit SLC series of Swarovski binoculars. From the optical point of view the binoculars are designed correctly. The prisms don’t limit the light, giving beautiful circular pupils, clearly visible on the black background. Apart from the distortion, all the other optical aberrations are corrected in the right way which is especially praiseworthy if you take into account the Meopta’s wide and sharp field of view.

The Meopta Meostar is a very interesting option on our market; the problem is that the company should treat its products to a small lifting in the form of better coatings. It would definitely improve the transmission and colour rendition. Additionally, in the case of this price segment a 5-10-year-long guarantee seems to be an absolute minimum.