Photo coverage

In the interiors, also for moving (breezy) foliage outdoors I get (or, hopefully, got) volumes of pretty-coloured … candyfloss is what it looks like - or perhaps loose glass fibre insulation. Currently using Trial so can’t export pics. As I say, now with tripod-firmness it’s gone from interior - so it’s about motion, whether camera shake or moving subject.

Tom Foster said:

"Where I’ve got is to not accept the entire spread normally offered as ‘reasonably’ sharp DoF e.g. (in examples above) 0.87m to infinity, or 0.73 to 4.35m,

but to rely on just the middle half of that spread, in which 'middle half is highly biased to the close end e.g. within a 0.73 to 4.35m spread, I’m guessing 0.82 to 2.5m as the middle half. I hope it should be possible to get that ‘middle half’ (or middle one-third if you prefer) accurately by tinkering with the source equation."

Yes, it may be very worthwhile, in RC, to go for better-than-“conventional-reasonable” sharpness within the conventional Depth of Field range. I wondered how to calculate that - and find that it’s very easy.

In https://www.pointsinfocus.com/tools/depth-of-field-and-equivalent-lens-calculator/#{%22c%22:[{%22f%22:10,%22av%22:%2211%22,%22fl%22:19,%22d%22:3000,%22cm%22:%220%22}],%22m%22:1}

click Advanced Options. Circle of Confusion is the number which determines “reasonable” sharpness. Its conventional default is d/1500 where d is the diagonal size of the camera sensor. Simply crank that up to d/2000 or whatever you wish (smaller Circle of Confusion = higher standard of sharpness within the Depth of Field range). The DoF figures tighten accordingly.

So for instance what was 0.67m to 4.26m DoF at CoC d/1500, becomes the tighter range of 0.75m to 2.49m DoF which achieves a higher standard of sharpness at CoC d/2000.