Hi Ted,
Well yea it is the lens that matters... sort of.
If you go out with a large camera and shoot 4 frames it will take you most of the morning. Now you might come back with four photographs or maybe nothing.
Once you get in the grove of shooting LF you find the process of shooting rather therapeutic, some people call it the Zen of LF but lets not go there. So although it's the lens that takes the picture it's the shooting process that gets you there... and that process might be more enjoyable with the higher quality cameras.
The Shen-Hao 4x5 is a well made basic camera, with plastic knobs. In use, I find that I have to fight the camera design a bit. In comparison if you use an Ebony brand camera it's a better design and shooting flows better. Now the camera is at a totally different price point so we're not really comparing apples to apples.
Yes you could take the same picture with both cameras and the same lens, but the experience of shooting is just that much nicer with some of the nicer gear. Now lets say you're having a lousy time shooting and are ready to pack it in for the day. If you've been fighting the gear all day you're done, but if the gear's been working smoothly and that part of the days gone well, maybe you'll hang around for a while and see what the light does.
So you have to ask yourself is it only the final image that matters..... or am I looking for the most positive shooting experience and the fact that I get a photo, or even a good photo is a bonus.... and the fact that it's on a large piece of film is just another bonus.
It's the same when using a rangefinder over a slr or dslr, yea sure the lenses are sharper, but only a photographer would care.... if you're going out to have a day of shooting you want to have a great day, and a great photo is a bonus. It's the positive feeling that comes with taking a great shot, using a great camera, the click of the shutter and the therapeutic winding to the next frame.
For most of us the pictures don't really matter, we're the only ones who see them, our spouses are bored with it all, so we end up showing them to other photographers, even strangers for a bit of appreciation.
-Rob Skeoch
www.bigcameraworkshops.com