I will be doing some test with a Apo Rodagon D 75mm that is optimized work between f4 and f5.6
My question is regarding the output Brightness of the lightbox. Maybe someone here tested it and can tell me that is enough for iso 160 and a decent shutter speed.
I see that negative supply is selling some lightboxes that they claim are 9x brighter but the price is out of my budget

thanks