I'm looking for a good way to get "perfect" focus on lower light environment.
I'm doing product photography (top down) of textiles with two flashes.
The flashes have a model light (is that the correct english term for that?). But at max brightness of the modelling light the camera can't set a good focus. I think this is a combination of low light and the texture of the textiles (no sharp edges etc.).
The camera sits about 70cm above the object. The textile is approx half a centimeter "high".
Would it be a good idea to print a paper with text or something "sharp" on it and focus on that? Or will the height difference of 0.5cm (between paper on the table and the textile surface) screw up the focus again?
To set the focus I use auto focus or by eye or in live view in Smart Shooter 4 by Tether Tools. The problem with liveview is that it's not super high res and super noise due to low light, so that's also not very accurate.
Any suggestions for this situation?