Dog-Violet - Helios 44-2 Lens @F/2, 100% crop

Common Dog-violet (Viola riviniana) - Violet family (Violaceae).

Lens: Helios 44-2 58mm F/2 M42 mount.

100% crop from original image.

Settings: Wide open F/2 @1/500s, iso 200

Location: Surrey, UK. from heavily shaded lawn.