Sure there's a difference, but when you can buy the base lens for $100 and 3D print your own cinema housing for $50, it becomes a lot more odious that IronGlass is charging what amounts to around $2100USD for a metal rehousing that is at most $50 worth of materials and a few hours work per lens.
The "Cinema" industry is notorious for gouging its customers, and this just yet another particularly egregious example of that gouging.
The "Cinema" industry is notorious for gouging its customers, and this just yet another particularly egregious example of that gouging.