many people different i'm not sure who's right. micro 4/3rds double focal length f1.7 20mm (40mm equivalent 35mm) people f3.4 40mm. should double aperture value? mean great 20mm lens @ f1.7 letting same light , bokeh 40mm lens @ f3.4 (i mention bokeh surprised shot @ f1.7 , background looked more f3-4 them)?
light same, oof area decreased compared same aperture on full-frame camera.
nitpick: sentence paranthesis should work if take paranthesis out.
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