Quote Originally Posted by JHannon
In his book "Edge of Darkness", Barry Thornton mentions a focusing problem with his SL66 during some tests (pgs 46-48).

He was using a homemade target with equally spaced vertical lines, focussing at the exact center.

His fix was that the interchangeable screen insert was not seated properly.
That's my guess too. I had a similar problem with my SL66, and finally the focusing screen wasn't completely seated properly.

I really love my SL66. Just as good and better than Hasselblad, but with a lot more possibilities. It's simply the best MF camera I've ever had.