Review on Diffraction Grating Slide Linear Lines Pack by Robert Yates

Not what I expected but fun, useful and good quality. Prisms bend light indoors, they bend incoming light, so you have to be close (your eye or camera lens) to see the effect of diffraction. I recommend using a filter effect on the camera effect instead of keeping it in the eyes because the spectral output has clean frequencies that can damage the eyes (probably not, why by accident?). Fun and great quality for a slide style but as another reviewer mentioned there is a bit of dust. Dust is not difficult to remove with a camera lens brush.