Binoculars review

Results of the review

Real front lens diameter	Left:   42.12+/- 0.05mm Right:  42.13+/- 0.05mm	8/8.0
Real magnification	7.96+/- 0.05x	3/3.0
Transmission	75.6+/- 1.5%	8/15.0
Chromatic aberration	Noticeable in the centre, high on the edge.	2.5/10.0
Astigmatism	Slight.	7/10.0
Distortion	The distance of the first curved line from the field centre compared to the field of vision radius: 50% ± 3%	5/10.0
Coma	A very good result. It starts late because in the distance of about 80% of the radius and is low on the very edge.	9/10.0
Blurring at the edge of the FOV	The blur occurs in the distance of 82% ± 4% from the field of view centre.	6/10.0
Darkening at the edge the FOV	Visible but not especially high.	3.5/5.0
Whiteness of the image	Untypical transmission curve with a surplus of blue light and poor red light transmittance.	3/5.0
Collimation	Perfect.	5/5.0
Internal reflections	Left: Right: Not bothersome but noticeable.	3.5/5.0
Housing	Quite long and not very stylish. Padded with black rubber with an unpleasant smell. Quite comfortable to hold. The rubber sticks out near objectives. Rubberized and regulated eyecups with three stops. Produced in China.	6.5/8.0
Focusing	Huge, ribbed and comfortable central wheel. It moves easily but smoothly. The full turn of the scale takes as much as 760 degrees so you have to work it a bit. Individual focusing on the right eyepiece through a comfortable ring with projections. It works properly but it moves the outer lens.	4.5/5.0
Tripod	There is a stopper at the front which we didn’t manage to twist off.	0/3.0
Interpupilary distance	from 54 to 75.3mm	5/6.0
Closest focusing distance	1.30 metres.	2/2.0
Eyepieces FOV	Apparent field of view of 53.2 degrees.	5/10.0
Field of view	Measured by us amounted to 6.69 ± 0.04 degrees and it was a bit wider than stated in the specifications. A small field for this class of equipment.	5/8.0
Quality of the interior of the barrels	Dark and quite matt. Small gray bottom near the prisms. Some specks of dust inside.	3.9/5.0
Vignetting	Left: Right: OL: 3.25%, OR: 0.95%	4.5/8.0
Prisms quality	Good quality BaK-4.	8/8.0
Antireflection coatings	Greenish everywhere. Medium intensity.	4.5/5.0
Warranty [years]	5	3.5/6.0
Final result		115.9/170 68.2%
Econo result		0pkt.

Summary

• slight astigmatism,
• excellent coma correction,
• quite good darkening inside the binoculars’ tubes,
• minimum focus already from 1.3 metres,
• good quality prisms made of BaK-4 glass.

• high chromatic aberration,
• not especially impressing field of view,
• weak transmission,
• truncated exit pupils,
• not very esthetic, smelly casing.

I admit that taking into the account the renown of the brand name, looking at the price and a not very impressing field of view I thought this pair of binoculars would have many good and excellent results in our test. Unfortunately it wasn’t the case. Only coma is corrected in a brilliant way; you can also say some positive things about the astigmatism, darkening inside and a good quality of the prisms. The slip-ups are far more numerous, though, and it is hardly understandable…

The field of view is narrow for this class of equipment so it should have been sharp till the very edge and distortion-free. It is not. The binoculars are relatively long which might suggest a significant focal length of the objectives and easier correction of the chromatic aberration. Unfortunately that aberration is corrected badly. The presence of multilayer coatings should indicate good transmission results; however, the transmission’s graph is untypical and the performance – simply weak, which can be clearly seen below.

To sum up these binoculars’ results would be acceptable perhaps for a roof prism instrument with a price tag below 200 Euro. As currently the Fujinon 8x42 MF costs about 350 Euro we can’t recommend it.