I don't know how many in this forum use large/medium format stuff, but if any of you do, I need a recommendation for a lense adaptor, or a medium format body. I currently use Hasselblad H1 bodies with Leaf Aptus backs, and Hasselblad CF backs. My issue is that my studio is getting requests to shoot concerts, operas, and sporting events, but currently we have no lense suited for this purpose. I have looked at the offerings from Hasselblad, and the largest they offer is 300mm/4.5. Optimally I would like a Canon 500mm, but I have so far been unable to find an adaptor to marry such a lense to an H system body. So if anyone knows of such an adaptor, or a body which can take a 500mm lense (non-mirror) and a Leaf digital back, or even creative ideas... please let me know. Thanks.