D FA 150-450mm 1st Quick Review with MTF Diagrams and Comparison against the Competition

http://www.yaotomi.co.jp/blog/used/2015/02/hd-pentax-d-fa-150-450mmf45-56ed-dc-aw.html
(in Japanese)

Seems to be the biggest and heaviest amongst the peer but the MTF diagrams look best, too.