My most common sizes were 30”x60”, 30”x40” and 40”x50”. I would also often make tryptics made of panels at the 30”x40” and 30x60 sizes. I also had to upscale my work for printing (I have a tutorial here: kzfaq.info/get/bejne/hMh4ar2ltrPXc2w.htmlsi=xhXAEjB_xa0k5TI8 ) my understanding is that ppi stands for pixels per inch and that industry standard is 300. So at 300ppi a native 61mega pixel print is 31”x21”. You can obviously print larger and have it look good, but the closer you are to that “native” size the sharper it will look. Again my upscaling tutorial might help!

@@summitbid Thank you. That was SO helpful. I have photos I have wanted to make tryptics out of. I kind of have an idea now how to do it.

Between the 24MP Nikon (I stick to full frame here) and the 45MP we lost "ceteris paribus" and are not comparing pure photosite size - a sensor has analogie photocells with an analogue circuit to measure exposure so there are no PICture ELements there (pixels). The difference is that the 45MP has no OLPF and the 24MP has an OLPF. Nikon has one camera where we can deduce "ceteris paribus" what the impact is. In 2012 Nikon released the D800E version that Eliminates the OLPF from the D800. Go to DxO Mark and find the sharpest F-mount lens. Now compare that same lens in the following comparisons on cameras as follows: D800 (36MP, OLPF) to D800E(36MP, no OLPF) - we deduce the impact of the OLPF - shockingly surprising. D750 (24MP with OLPF) to D800 (36MP with OLPF) - we deduce the impact of more MP - disappointing. D800E (36MP no OLPF) to D850 (45MP no OLPF) - we deduce the impact of more MP - disappointing. The OLPF (also called anti-aliasing (AA) filter) was introduced to make the guessing of colours missing in the Bayer raw file easier, and at the same time deal with jagged edges/lines. I call the OLPF "fuzzy filter). It make life easier for the Mudbricks in programming their camera-raw programs and up to a resolution point we don't really notice, but above that the cons exceed the pros. As the OLPF disperses light travelling to photosite [x,y] so a fraction hits the direct neighbours, it: - reduces (contour) sharpness; - reduces low light sensitivity; - reduces dynamic range (DR); - reduces contrast envelope (DR available in a single shot); - reduces colour space; - and messes with vignetting. If we bring in the comparison between Nikon's APS-C and full frame and e.g. compare a D500 (20MP) to a D750 or Z 6ii (24MP), and conclude that the D500 is very good, then we have to be aware that the D500 has no OLPF as its photosite density compares to that of the 45MP full frame camera.

@@jpdj2715thank you for the thoughtful exposition. Much appreciated!