Sony A7 with Pentax Full-frame Glass - Review Announcements | PentaxForums.com (Mobile)
Sony A7 with Pentax Full-frame Glass Review - Adapting Pentax Glass on the Sony Alpha 7 | PentaxForums.com Reviews (Mobile)
Amazon.com : Fotasy PK Lens to E Mount Adapter, K Mount E Adapter, PK FE Adapter, Compatible with Pentax K Lens Sony a7 a7R a7s II III IV a9 a7c Alpha 1