I went from a JVC X35 plus Isco II lens to an X500 and zooming.
I compared them side by side, both fully calibrated (using a Lumagen 2041), same peak white, etc. I only gained 1% brightness using the lens (since I'm at absolute minimum zoom in the projector I gain brightness just coming off the end stops). I think the brightness gain can sometimes be overstated, especially since the ideal set up with a lens is to have minimum zoom on the projector for least pincushion and to avoid vignetting.
In my case the e-shift feature covers the pixel density/visibility side and a dark surround to the screen covers black bar overspill.
Of course I have lens memory on the X500, but also scaling in my Lumagen so I can do an instant 'shrink' for 16:9 menus and trailers once I've already zoomed to 2.35:1. I have other aspects covered with the lens memory so I can watch without scaling on those.
I just don't get any benefit in my set up using a lens now (though I did prefer it over zooming an older JVC HD350 that I had when I first bought the Isco). It took quite a while to sell as well, so I think I may have timed it right.
"Don't believe everything you read on the internet". William Shakespeare 1615
Last edited by Kelvin1965S; 09-08-2016 at 02:24 PM.