Afowoda yi, pelu jigi atenikun meji (hyperbolic mirrors), gbajumo fun iseaworan todara lori ibi iriran to fe gidi, pelu ainianfani pe awon bi awon jigi na se ri soro lati da ati danwo.. 
Working backwards from images of point Sources, Astronomers determined that the conic constant of the Mirror as built was -1.013.90-0.0002, instead of the intended -1.00230.. 