Build Your Own SLA/SLS

Hi guis,

I am using a LittleRP und actual the FunToDo Resin. My Problem is, that there different mistakes on my print. some areas are semmed to be overexposed and other areas looking like underexposed. My question? - is it the Resin or my Printer. Exposed time is actuall 580ms and 0,050 mm

this effect is caused by spherical lens all DLP use.
the only solution is to use software mask - to dim a bit lower the center, so the side parts will be as bright as center.