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Message: <blockquote data-quote="Binastro" data-source="post: 3617628" data-attributes="member: 111403">The British Avimo binocular is fixed focus I think, although I haven't tried one.They were deemed sufficient for young soldiers whose use is for distance observing.Similarly the Bushnell 4x21 and 4x30 Xtrawide are fixed focus.I cannot really use the 4x21 because of little accommodation, but stars at the edges are in focus for me with I think field curvature.Children, however, seem to love them with 18.5 degree field. Actually 3.5x21.I gave a friend's son the Konus 10x50 fixed focus and he finds it to be fine for astronomy.P.S.Although the early Minolta autofocus binoculars are not very good the later ones such as the 8x23 I find to be superb in good light. It focuses almost instantly, much quicker than manual focus binoculars and is pin sharp.It does have trouble in dense foliage but no more than good autofocus camera lenses.In addition it has a very large dioptre correction range.But it is bulky and needs a battery.It was a very good effort by Minolta.</blockquote>