Since our cameras have movements, and for avoiding vignetting, , it would be better to fix a flexible compendium ( with movements, too) to the front standard or to the camera body.
Old studio cameras didn't use a compendium which came later in time; with some rods and a large cloth instead of a hood or a compendium, I believe everything should be done fine.
On the other hand, from time to time I find flares as a useful tool to reduce contrast, and as an artistic add, too.
Ritchie
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