That's scary Gary, Get yourself out of there!

Looks like the FA31, at least, will be excellent on full frame: LINK

Wonderful, especially no.2. The shallow DOF and indefinable 'filmic' quality gives these an edge. When you consider the bucks people spend on their digital kit, it's quite shocking what you can achieve on 'cheap' fim SLRS. Do you get a sense that people are more intrigued / less intimidated when you are using a classic film camera?

There are already quite a few digital FF images from Pentax lenses out there to pixel peep- have a Google for 'Pentax lens on Canon 5d' or 'Sony A7'.

I see what you mean, Nigel. I was assuming there'd be a mask which would activate in crop mode, replicating an apsc viewfinder. I certainly hope that's how Pentax implement it!

Nigel, assuming the magnification is the same, you'll get exactly the same view in cropped mode as you do with your apsc dslr.

I've tried a couple of non Pentax FF, and was slightly underwhelmed by the increase in viewfinder size. I hope this Pentax will be different with a good image magnification, and a big bright viewfinder. The prism hump does look big in the photos, and Pentax have sought to differentiate themselves via good viewfinders before, so it bodes well...

I've read some people say things like 'this or that lens was fine on a 12MP camera, but starts to show issues on a modern 24MP sensor'. I am not sure what to make of this, because 12MP is acceptable for 99% of printing purposes.

If image quality issues aren't apparent on a print taken on a 12MP camera, are they really significant printed at the same size from a 24MP camera?

Yes, IDEALLY we would want our lens to outresolve the sensor, but is it worth worrying about so much? So long as it is sufficient for a decent sized print?

By the way, I've not done any standardised tests of legacy lenses, but from simply comparing images I've found some legacy lenses perform much better than new digital lenses I have owned, e.g. I have an old 24mm f2.8 which is much more consistently sharp than I found the CA-prone DA15mm, and I find the F35-70mm sharper than the 18-55 kit lens, with much less CA.

I can't see why a wedding tog wouldn't use golden oldies like the FA50, 43 or 31. I can't see them using old MF lenses for reasons of customer perception and needing to work quickly and efficientlly, though!

2 & 3 are my faves. I'm sure you've noticed you've clipped the edge of the pool on the right hand side so I won't bring it up ;P