Enhanced Vision with Ajax Scientific Concave Mirror Diameter Review

Bought for physics class. They are very good quality for the money. Much heavier and higher quality than most small convex mirrors. After 3 groups of students used them, we found that the focal length was NOT 25cm as advertised, but closer to 20cm (200mm). It's okay, but you still want to know what you're buying.

Knowing this is a frameless mirror so has a dished base I give it five stars Quality mirror and meets my expectations. I bought this to try out as a turntable for precision gyros and found that the curvature is still a bit steep for gyros that can be prone to blasphemy, but overall it's still a versatile alternative to glass lenses and I like the look for photography . Vertices reflected in the image. The curved underside issue was easily fixed by ordering some 4" OD x 3/16" thick o-rings…

Don't let the 'scientific' in its name fool you, this item is of inferior quality to a dollar store bathroom mirror. It ended up in a paper sleeve with no protective film on a mirrored surface - which is actually what you get in a dollar store mirror - so of course it arrived with a small scratch right down the center and grains stuck to it. I rinsed it under water and tried using a lens tissue to wipe the stains only to find the stains were on the other side of the glass. In other words…