Below: the first batch of fresnels.  Took some time to get the settings right since what I thought were the old settings were scorching my new brand of lenses- eventually got it by dialing down the power and putting blue painters tape on the back, transfer tape on the front to protect.  Imagery from invertebrate biology textbooks and the biodiversity heritage library.IMG_8959.JPGimg_8943Video:

img_8925IMG_8973.JPGA scorched one:img_8903My tests:img_8905: