I have rather minimal experience in scanning with a flatbed scanner and non-existent experience with slide or negative scanner. So: what would be missed from a dedicated scanner when digitizing with a DSLR (if one already has the sufficient gear)? What generally are the major drawbacks? Or will a DSLR excel in some aspects?
Resolution is something that my Canon 450D probably wouldn't match to the 4000+ dpi that scanners offer, but that's probably something I could cope with (or is it?).
To summarize strengths of a scanner so far:
- ICE & Multi-Scan
- IR-based ICE: definitely will be missed. Can't be easily DIY-duplicated — though this just means more time will be spent on the post-processing.
- Multi-Scan: doable with image stacking
- Slide holder & even lighting
- Slide holder: DIY-doable.
- Even lighting: might be hard to set up, but doable.
- More human intervention is needed.
- Setup time is longer and scan time per slide is probably shorter with a DSLR, but scanning won't be a background activity.
Is this it? Are there any other technical aspects that are commonplace among scanners, but hard or nearly impossible to MacGyverize (like IR-based ICE) for a DSLR? I would suspect there is, as the scanning techniques are drastically different — then again, I don't have much scanning experience with a scanner. Is there any impact on the image quality? Would a scanner capture some details that a DSLR couldn't? Or the other way around?
I'm offering a cake for some more details.
I found some good info on comparing the density & dynamic ranges on ScanDig and scantips.com. I have a hunch that in terms of the density range, devices would be ranked:
flatbed scanner < DSLR < negative scanner < drum scanner. Unfortunately, I don't currently have deep enough understanding to form an answer based on those articles — and my hunch may as well be incorrect.
Do the negative/drum scanners excel my DSLR, that has a dynamic range of 10.8 EVs? (And would my DSLR actually be better than a flatbed scanner when scanning negatives/slides (= transparent material)?)