BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply to thread

Message: <blockquote data-quote="Binastro" data-source="post: 3326886" data-attributes="member: 111403">Sometimes it is the glint from posts and rifles that show rather than their size alone.Although long but thin posts will show at surprising distances.The British redcoat uniform might well be seen at 880 yards with good unaided eye sight.Also if you had a group of several soldiers together with small distances between them the uniforms might well be deduced at 880 yards.But 10 miles with 20x binoculars would probably not reveal much if the Seeing and heat haze were bad.A  100mm binocular or telescope at 100 times is a different proposition.Questars are used for such purposes and may well show uniforms at 10 miles in favourable conditions.One I had, had a hard military life before being sold off. The eyepiece elements were probably wrongly assembled in the field after cleaning, which is why I got it cheaply. It took about 15 minutes to figure out and put the elements back the right way. I don't think much of the field technician's skills. It was impossible to get an image the way it was reassembled.I agree that 20x100 binoculars won't show normal uniforms. You need about 60 times to get the full resolution from 100mm aperture.</blockquote>