70mm film is available but there is a "yeah, but" to the whole thing. I looked into this for my Hasselblad. The developing tank and reel for the 70mm film is quite expensive- about 175 for the reel (Kindermann). It would take quite a few rolls to amortize out the expense of the reel.(posted 9263 days ago)If you are a devotee of the emulsions that only come in 70mm- some aerial and infared films in particular- I suppose you can bite the bullet and pay the cost. Also, if you do things like take pictures of graduating classes where 70 pictures at a whack is good, 70mm makes sense but, otherwise, it does not make economic sense...
Jeff