Ray, how's your post-processing skills on the computer with RAW files from the K5? It's taking me some time and effort to get reasonable-looking B&W images from RAW files, and I haven't had any printed yet to compare with darkroom prints. Probably I'm scared to! Nik Special Efex Pro 2 is pretty good for conversions to B&W. You'll need to develop a good workflow (ie a consistent step by step approach). What lenses do you have for the Pentax? Don't forget you can often stitch multiple frames together to make a very large and detailed image with digital.
If you are going with MF film scans the files will be huge, and you'll need a reasonably powerful computer and lots of disk storage! A Hasselblad would be great for the still-life work, but would you want a 2:3 format for landscape prints? A 6x9 MF camera should give you all the resolution you need with slow fine-grain film. As mentioned above, cropping the 6x6 frame to 6x4.5 might lose you the resolution you ned.
I also love the old film cameras. I just acquired a Fuji GSW690, with landscape in mind, despite having a nice Hasselblad kit. The Fuji is lighter and has just one lens. 🙂 The 'blad is better if I want to use grad ND filters as I can see the effect on the ground glass - not so with the Fuji.
I'd have to agree with the poster above who suggested trialling the K5 first. Convert your favourite image, make a suitable digital file from it and get it printed at the size you need, then see how it looks and get opinions from the folks whose opinions count.
Great project - have fun, and good luck!
Chris, I wish I could say that I am an expert with post processing, but I am not, although I have
experience! Do you ever stop learning? I have CS3 and Lightroom 3 - LR is my favourite and getting nice B&W from this software is not too onerous, although I haven't had one image printed under both digital and wet for comparison. Having read all the comments and having hit on an interesting theme, I am a bit less enthusiastic about expanding the film route further than 35mm right now, so I will look at the digital workflow in more detail for this project.
The K5 is a recent replacement for my Samsung GX 10 - so recent that I have not really had time to really get to grips with seeing what it can do, although I have seen the benefits of that sensor and the high ISO performance. I have Pentax M 50 f1.7, M 75-150 f4 zoom, M 200 f4 and K 300 f4, plus a Sigma 17-70 DC Macro that finally produces the goods after adjustment by Sigma. The older lenses are quite nice, but CA is sometimes an issue with colour, but that seems to be the case with many digitals, but no problem with B&W, of course. I am thinking of a couple of top quality primes to replace the oldies.
It is interesting to see the arguments on the quality of B&W output from both analogue and digital, both here on previous posts. Rightly, this is a pretty passionate debate, but I have been bowled over by the quality of some of the digital images that I have seen both here and in other places, so I know that all is possible. As I think the project through, I think I may produce more images at the more modest sizes, with the odd one at A3 - another reason for leaning more towards digital.
More work and exploration to do on this. But I feel energised by a new direction! Isn't photography just great!!
Ray