I have just purchased a Rodenstock 90mm f/6.8 Grandagon lens and a Shen Hao 617 Panoramic camera. I took it out for a play the other night to photograph a large floodlit building. Even when removing the Centre Filter it was very very hard to focus the camera. I could only use the very brightest of high lights, A lot of the composition was guess work. I have since had a play with the camera in the daylight and find that even with a good lupe, trying to focus the edges is almost impossible if any of the subject matter is dark. Mid tones are extremely hard work as well Question 1) Any suggestions that will help? Question 2) Have I brought the wrong Lens? The dealers said that it was a good lens, is it? Many many years ago a used a Toyo 5x4 Monorail camera and I am sure that it was much easier to focus. Question 3) What other lenses would complement the the 617 format for landscape and cityscape pictures? Question 4) The first building that I did want to photograph I needed a wider angle of view. Can I go wider than a 90mm lens? Question 5) Any other advice that can be given to a newbie on the use of the 617 format and the Shen Hao? Question 6) Any other 617 Shen Hao Users here?