The Schneider Symar 150's were all described by the factory as 4X5 lenses until the APO version, which they called a 5X7 lens. I don't know if a 150-S (single coated or multi) will cover at infinity. Since they cost next to nothing, get a 150 g claron and you will have plenty of coverage and room for movements. There a number of historic threads on here that indicate the g claron 150 barely covers 5X7. My experience with multiple samples is that it does much more than that.