While attempting comparisons of different binoculars I often focus through my window on a particular area of peeling paint on the eaves of the building opposite. It has an "organic" pattern of varying areas of top coat, undercoat and corroded metal within an area of about 6" x 4".
I find the consistency of the target makes for quite a revealing quick assessment of an unknown pair of bins against a known standard.
This led me to wonder if anyone has ever devised or heard of such a thing as a test card for binoculars.
[QUOTE=rozinante]While attempting comparisons of different binoculars I often focus through my window on a particular area of peeling paint on the eaves of the building opposite. It has an "organic" pattern of varying areas of top coat, undercoat and corroded metal within an area of about 6" x 4".
I find the consistency of the target makes for quite a revealing quick assessment of an unknown pair of bins against a known standard.
This led me to wonder if anyone has ever devised or heard of such a thing as a test card for binoculars.[/QUOTE]
Hello,That could be the 1951 USAF test target [resolution chart].It uses smaller and smaller lines verticle and horizontal to test for resolution.Edmund's Optics site has these,but this is in the U.S. There is one that goes for about $18 that I have and it has a bunch of these test targets in black,yellow,blue and red in a criscross pattern mounted on heavy paper .
Regards,Steve
Regards,Steve