Panasonic Leica DG Macro-Elmarit 45mm f2.8 ASPH Mega O.I.S. Prime Lens Interior measurements are approximately 10x10x30cm

Interior measurements are approximately 10x10x30cm

so that's at least some help for the first issue

tested accurate

This is a compact large format lens in the normal focal length range for 4x5"

Panasonic Leica DG Macro-Elmarit 45mm f2.8 ASPH Mega O.I.S. Prime Lens Interior measurements are approximately 10x10x30cmThe Panasonic Leica DG Macro Elmarit 45mm f2. 8 ASPH Mega O. I. S. is a good quality macro lens for Micro Four Thirds cameras. It provides 1: 1 magnification without the use of extension tubes, plus an effective image stabilizer for steadier handheld shooting. In excellent condition, with clean glass and good function. Includes original hood.