I tried researching this claim and found forums[0] discussing that in some cases Pentax has sold Tamron designed lenses but it sounds like it's far from all Pen

I tried researching this claim and found forums[0] discussing that in some cases Pentax has sold Tamron designed lenses but it sounds like it's far from all Pentax K-Mount lenses. Also worth reading this article and the comments[1]. Sounds like all * lenses are in-house Ricoh designs, and just a few select lenses have been partnerships with Tamron. Do you have sources? [0] https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/401959-third-party-original-manufacturer-branded-lens-questions.html https://www.pentaxforums.com/forums/10-pentax-slr-lens-discu... [1] https://fstoppers.com/originals/comments-suggest-newly-announced-pentax-fa-85mm-f14-just-rehoused-sigma-lens-468065 https://fstoppers.com/originals/comments-suggest-newly-annou...