Alan Edward Klein
Member
It might be easier to go back to all chemical.I'm in a similar position to the OP, developing photography facilities for students. We also have a set of V800/V850s and a flextight X1. The flextight is now unsupported and will eventually break down or become unsustainable, so looking to the future, I am thinking along similar lines to yourself.
In general, it's clear that camera capture is likely to be the only way forward in the long term, but building a system which is workable in a University/student setting is not easy. Getting something which can reliably produce scans of the same quality as the Flextight is not trivial. Having done quite a bit of testing myself, I remain unconvinced that any of the current off-the-shelf solutions within a reasonable budget would provide the quality and consistency we would like when operated by students.
For 35mm, the 5DS R (50mp) which I have tested does produce more or less the same quality as the Flextight (max res 6300ppi) within the focal plane, but keeping the entire frame on the focal plane is difficult to say the least. If you want to achieve the highest resolution, you need to be shooting at f5.6 or even f4 to avoid diffraction. The only way I've managed to get the entire frame sharp at these apertures is by sandwiching the film between two sheets of ANR glass, which unfortunately produced newton's rings. Although the Negative Supply holders look pretty good, I seriously doubt that they will be capable of keeping the film this flat - especially with frames at the end of a strip. For me at least, any solution needs to be able to deal with cut strips because that's how film tends to be handled.
Without an extremely high precision system, I'd say it's more realistic to aim for more like 3200ppi on average across the frame, which is still substantially better than an Epson, but even this would be quite hard to maintain with student operators. It doesn't take much for the resolution to drop to below what you would get with the Epson. It would probably be best to recommend shooting at f11, which would limit the maximum resolution in favour of consistency.
In medium format, assuming a single-shot workflow, you would be hard-pushed to get any better than the flatbed with anything larger than 645. Using a 5DS R to shoot 6x6, 6x7 or 6x9, the theoretical maximum resolution is around 2600ppi - realistically you would be getting less than this, and the Epson gives you around 2400ppi. Multi-shot stitching is a possibility but I would not have confidence that many students would a) want to go to this trouble, or b) be capable of doing it properly. 645 could work well, however - with a theoretical max res of around 3500ppi. Because of the lower magnification and subsequent greater depth of field, it might be realistic to get a consistent 3000ppi, which roughly equals the Flextight (3150ppi).
So my thinking at the moment is that it would be feasible to set something up which could consistently get better results than the Epsons for 35mm, but at present I can't see a solution which could reliably get close to the Flextight. For 645, a high-res camera-based system could potentially equal the Flextight (though this is only moderately better than the Epson anyway). For MF 6x6 and above, I don't really see a solution. For large format, the Epsons are probably already the best option.
To be honest, given the above, I think it might be worth considering the Plustek 8200i for 35mm, since it's a self-contained unit, requires very little setup or maintenance and does the negative conversion for you. The optical resolution is around 4000ppi and it's a lot cheaper than a camera setup with good components. It would be a lot slower than a well set-up camera system however, so it depends on whether you want to prioritise batch-scanning or getting the best out of a few frames.
On the subject of control, personally I would not want to attempt a camera setup without live view, which is invaluable for levelling and checking focus. So I'm not sure that using the H3D is a good idea - also its firewire interface will even make tethering a problem going forward.
Anyway, there are some thoughts from someone in a similar position to yourself - sorry I can't really offer any solutions. I'm sure there is a way to make the camera scanning thing work, but I think people generally underestimate how hard it is to get something that works consistently well with operators that don't know what they're doing (students). If you do go down this route, I'll be really interested to hear how it goes.
