I'm attaching an image so others can easily see what you're talking about.Afish wrote:Search for "macro focus slider" on EBAY. Would these be useful as camera mounts? They are available in 2-way or 4-way adjustable versions. This would add about $60 to $100 to the finished product.
I am thinking it could be used for going from smaller to larger books and as making minor manual focus adjustments without touching the camera focus.
Here's my take. First, I think these would make great book scanner camera mounts. The left-right adjustment and relative precision would be useful, although honestly I imagine you'd only set that once- like on the A590is, the offset for each camera is something like 1.5" and I set that and left it in place.
The forward-back adjustment wouldn't be worth much, in my opinion, because you have zoom controls on the cameras. If you use compact cameras, the depth of focus is great enough that small movements provided by a mechanism like this are probably not as good as just refocusing.
One downside to a mechanism like this is that you still need something to tilt the cameras.
If I had money, and I was trying to build a kind of ultimately adjustable scanner, I would go for these. I think camera mounts are still an open problem -- we have lots of solutions but none are particularly elegant, mostly because there's no standard camera that we are all using.