Canon Serenar 13.5cm f4 for LTM brand_Sekonic The Panasonic G Vario 100-300mm

The Panasonic G Vario 100-300mm f4-5

but it's got a much larger 10x10cm square plate surface to support heavier cameras (talking large format here)

so while it's modern enough to do its job reasonably well

The Kodak Retina IIIC is a high quality 35mm rangefinder camera with a coupled rangefinder and built in lightmeter

the autodiaphragm mechanism is slow enough to affect exposure

Canon Serenar 13.5cm f4 for LTM brand_Sekonic The Panasonic G Vario 100-300mmCanon Serenar 13. 5cm f4 lens for Leica Thread Mount. Decent focusing action, slightly rough aperture action, heavy fog. Cosmetic wear, too, including a damaged filter ring.