Some years ago I abandoned a project for digitising my 35mm slide and film-strip collection using a Nikon Coolscan V ED - the process was too slow. Now I’m going to try ‘dslr scanning’ - except it will be using my APS-C based Fuji X-T30 camera instead of a FF camera that most people seem to use. I have spent weeks embarrassing myself by not being able to get my head around whether I need a 1:1 macro lens or a ‘50% magnification’ lens. My biggest problem has been in understanding how it is possible to get an image of a 36mm X 24mm slide, scanned life-sized (1:1), projected onto a 23.6mm X 15.6mm sensor without loss of data.
I now understand that isn’t possible and that a 05:1 (1:2 ?) lens will use only about 65% of such a sensor, resulting in less than optimal image size/resolution. For some reason I was convinced that these two types of macro lens operated at only the one level of magnification - either 50% or 100%. I now see that operating a 1:1 macro at something like 1:1.4 will fully utilise an APS-C sensor when scanning a 35mm slide.
Is my understanding correct?
I’m planning to use a Nikon ES-2 Slide Adapter, screwed onto the front of the macro lens (either a 7Artisans 60mm f/2.8 Mk II or a TTArtisans 40mm f/2.8). Is this likely to impose too much of a load on the lens mount of my X-T30 (bearing in mind that the TTArtisans lens extends its barrel when focusing to 1:1 size)?
Are there any recommendations of what style, technology, power/brightness and temperature of light source I should use?