New HD PENTAX-D FA★ 50mm F1.4 SDM AW photos and samples published by Chi Tsung Pin on his Flickr account!
PENTAX K-1 samples dated from 16th February to 29th March 2018 and PENTAX K-1 II samples dated 5th and 19th April 2018. So very likely lens is a prototype copy!?
Samples with PENTAX K-1
Samples with PENTAX K-1 II
(Not 100% sure but probably taken with HD PENTAX-D FA★ 50mm F1.4 SDM AW)