>>2620356I wouldn't use your design.
Continuous lighting means long exposures, roasting your sensor and risking blur from any bumps, as well as taking longer. I use off camera flashes. There's really no way to standardise the way the contraption mounts to the front of all manner of lenses.
You don't appear to have included a way to alter the film to camera distance for apsc or crop, 50 or 100mm lenses, scanning 135 or 120, or any combination. You could use telescoping tubes I guess, but it would be difficult to keep the slop out of them.
I still want to be able to stitch my 120 shots, which this doesn't accomodate.
>but good luckIf I were you, I'd keep costs down by not making one unit with full functionality, but by making it modular, and you buy a different hood for your particular camera/lens/film combo.
I would make a Crop/50mm/135 and FF/100mm/135 my initial offerings.
And remember, anyone using a non-macro lens on tubes is going to get shit results, because of field curvature, primarily. So specify BYO real macro lens.