In bright sun I have several test photos taken with or without aperture. And I've made sure wanted to produce flares. Dan the same images (same motive the same angle to the sun) with 18,35,55 mm again taken up with iris. My result was that I could not see a single flare on the images with Streulichblende, also irradiation side from the direction of the sun no longer exist. Furthermore, were to discover image borders on the well at any focal length shadowing. I mention this only because apparently one or the other at 35 mm exactly the problem was with this panel, I can not confirm.
The visor also sits well on the opjektiv and makes a, for the price, convincing quality impression. Flipped on the Opjektive she is good at taking away space and hardly can theoretically be constantly left on it because it weighs nothing.
Sogesehen there by myself full 5 points, because it does what it should do and that. Without any annoying drawbacks