When I had by 3.5T and 2.8e, I just allowed a bit of extra room around the edges of the frame. It's only a real issue if the subject matter is closer than a couple of metres from the lens. My old C330 had a very useful indicator and I used a Mamiya "Paramender" to compensate. With Rollei, there are Rollei "Parkeil" supplementary lenses to assist with parallax correction.