I am currently chatting with Mike of Walker Cameras, with regards to getting a Titan XL 5x4 for use with my newly-acquired scanning back (Thanks, Doug and Chris!).
I was asking about appropriateness for digital, and the focusing problems people have in general, to which he said he always uses standard pitch focusing (2mm apparently), but he could fit a finer pitch focus if required.
I presume the requirement for fine focus increases as a lens' focal length decreases, but at the same time you will be decreasing focus 'snap' for longer lenses?
So my question (for all those with much more digital experience than myself!) is:
Below what focal length do you think fine focus would be beneficial? And at what point do you think it may become a hindrance?
My guess is that I'll be looking to cover focal lengths between 55-90mm, or maybe even 135mm at a push.