Edge sharpness in the field of view of binoculars

For technical reasons, image sharpness decreases from the centre of the image to the edge with every lens (due to the shape of the lens).

As a rule it can be assumed that the higher the quality standard of the binocularsthe better the Edge sharpnessFor technical reasons, image sharpness decreases from the centre of the image to the edge with every lens (due to the shape of the lens). " More info or the lower the sharpness drop.

If the field of view is generously specified for inexpensive binoculars but caution is advised!

It is possible that the larger Field of visionThe size of the field of view indicates the width of the terrain that can be observed through the binoculars at a distance of 1000 metres. " More info at the expense of reduced edge sharpness achieved. Other suppliers, on the other hand, advertise optimum edge sharpness, but conceal the fact that this was achieved by reducing the field of view. However, if perfect edge sharpness is achieved exclusively through a Artificial reduction of the field of vision this speaks more for a creative marketing approach on the part of the provider than for the sound quality of the optics.

So that you can Realistically assess the quality of an optic should therefore the field of view and the edge sharpness of a product always be assessed jointly.

In general, it is always recommended the following quality features to check:

Edge sharpness
Image brilliance
Twilight performanceIn order to be able to recognise details over long distances even in twilight, binoculars with high magnification and corresponding twilight performance (e.g. 10x56 or 8x56) are recommended. " More info
Field of vision