Hello. I am doing a river trip very soon and I would like some advice as to what would be a good lens to use with my Sinar P 4 x 5 camera. I have 135 mm and 210mm lenses. Do you think the 135mm lens would be a good lens to use? I don't want the images to look too wide angle.....I want more of a std. lens look. I am told that the 135mm lens would be good to use...however, I would like a second opinion.