I was all set to order a Letus extreme when it was brought to my attention that the HMC150 will invert the image in the viewfinder. Why pay the extra bucks when you could purchase a 35mm DOF unit that doesn't flip the image and is much less? What are the advantages to the Letus extreme? It wouldn't be that difficult to flip the image in Final Cut? Wouldn't there be even less loss of light if the DOF unit wasn't reflex? Is there something I don't know?