Originally posted by monochrome What benefit would Pentax get paying a fee to a company that reverse-engineers everyone’s mounts and pays nothing for the rights?
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It’s swings and roundabouts. There may be benefits in letting third parties fill gaps in the line which would otherwise remain empty and, overall, add products which make the system look much stronger than it actually is. This may help customer retention, sell more bodies and attract more new buyers to the system. Against this, however, there is the very obvious loss of first party revenue. It’s also may be quite difficult to be selective rather than all or nothing, so one can’t say to a third party yes you can do a 20mm f2.8 UWA but no you can’t do a 50mm f1.4. A company with only a small catalogue of modern lenses to begin with could be swamped. Maybe better in that case to say no overall.
Pentax do work happily with third parties, however, such as Tamron and Tokina. I suspect in the case of Sigma there may be a long history of bad blood among some companies over Sigma’s business practices. That may have as much or more to do with the situation as anything else.