Originally posted by Warped I'm wondering if the likes of Sigma, Tokina, Tamron, Zeiss .....etc or any cheap no-name Chinese knock-offs will ever start making new lenses specifically for
Improbable in the extreme, on a purely economical basis if a third party lens manufacturer suddenly decide to make a line of medium format lenses they would have to invest mega bucks for a relativity low volume product. Different medium format cameras have much larger flange distance variations than smaller DSLR cameras do which, taking into account the technical hurdles of actually making a decent lens with an image circle big enough to be used on a 33X44mm sensor I don't see any of the major third party makers starting from scratch a building a separate line of 645 lenses.*
I do recall the camera company Bronica being bought by Tamron, and they might have a few lens designs they can re-engineer to suit the pentax 645.
*In the highly unlikely event of a third party producing medium format lenses I can only imagine the reaction from leicaphiles if Sigma,Tamron or Tonkina ever made lenses for the Leica S2.