Hello all, I make first steps in large format, and I want a wide-angle lens. 70-90 mm (like 24-28 mm on 35mm film, right?) I found on ebay Super-Angulon 8/75mm and Super-Angulon 8/90mm, not expensive and not very old. But, most of these lenses come without center filter. How strong is edge fading on 75 mm without filter, maybe shooting on color slide is difficult? And I found only a few reviews or samples of Super-Angulon 8/75mm, does anybody use this lens? Currently i shot on Toyo 45CX (yeah, heavy and uncomfortable) with Nikkor-W 150/5.6. Sorry for my bad English Ilya.