The size of the pinhole has some effect on that but you'll never get it truly sharp. If that bothers you but you want to work in large format, just get a regular large format camera and cheap lens. It needn't cost much at all these days. Of course you CAN spend money on a brand new Ebony, or even a new Linhof (if you're insane - Linhofs are built like tanks, get a 20-30 year old one for less than half the price and never know the difference. My 1957 one is definitely a "user" and has things to work around, but is still quite usable.) A lens can cost a hundred bucks or less. You can probably get a usable 4x5 outfit used for less than these Titan 8x10s new.
Originally Posted by Bruce Robbins