Sekonic Studio Deluxe III L-398A viewing filter too: not much larger than

too: not much larger than a normal 50mm lens

It accommodates either an extra EN-EL15 battery or 6 AA batteries with the included trays (the batteries are sold separately)

The DR-5 rotates 360 degrees and has switchable 1x/2x magnification for more precise focusing

The Meike Cinema Lens 50mm T2

nothing else does what this flash does

Sekonic Studio Deluxe III L-398A viewing filter too: not much larger thanThe Sekonic Studio Deluxe III L 398A is a classic battery free light meter for reflected and incident light metering. In excellent condition, with only minor cosmetic wear. Includes dome and flat diffuser for incident light measurement, Lumigrid for reflected light, original case, and box.