Any opinion on the Focus Pyramid?

[cascadesjohn]

I just saw an online come-on for a $19.95 product called the Focus Pyramid, purportedly designed to help you simply make micro adjustments to lenses to increase sharpness. Can anyone give any pros or cons from experience? Thanks.

 

[SCraig]

Unless your camera is one of these it isn't of much value at all.

Canon (50D, 7D, 5DMkII, 1DMkIII, 1DMkIV, 1DsMkIII, 1DIV)
Nikon (D7000, D300, D300s, D700, D3, D3s, D3x, D4)
Sony (A850, A900, SLT-A77)
Olympus (E-30, E-620, E-5)
Pentax (K20D, K2000, K200D, K-5, 645D, K7D)