I have used Panamorph anamorphic len with my JVC DLA 7000B projector before and I have to say that it does retain brightness but anamorphic len will inevitably introduce some geometry issue because of the construct of the len in it prism form. As you can see, light refraction through a prism requires precision to eliminate not just the trapezoid effects on the sides but also color fringing. So there is a trade-off in using an anamorphic len on Projector…some valued brightness (every lumens count) over a little geometry anomaly (less sharp around the corners and risk of color fringing at certain parts of the screen)…But for a projector with laser source, it is less of an issue simply because laser light source is more consistent with its light output and we tend to see less degradation over time. As long as the zoom out from a 16:9 AR to a 2.35:1 AR is not too drastic, I will stick with the Projector zoom out feature since the projector will not take a hit on lumens (brightness). Of course, the screen size plays a role as well…if you are zooming out to say fill a 150" screen while your seating distance is say 5m away(quite far from the screen), then anamorphic len is one option to recover those previous lumens.
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