This is a Yashica camera with a 38mm f/2.8 lens, modified for a SONY NEX-E mount. The mount is made of plastic from a mock lens and can be locked. The mount doesn't feel loose; it has a certain amount of torque, allowing for a secure fit. The aperture is fixed at f/2.8 and cannot be adjusted. Focusing is done with the lever on the bottom, which is designed to focus from approximately 0.5m to almost infinity ♾️. The lever moves smoothly and can be operated with a single finger, making focusing easy. When viewed with a penlight, the lens is very clean with almost no dust, debris, or clouding, but there is one hairline scratch. Photos taken with a SONY α7II, using the color STD setting and no correction, are included at the end. The very last photo was taken with a close-up lens attached. The photos were intentionally taken in backlight to showcase the lens's characteristics. The images appear to have a refreshing and clear rendering. As this becomes a 57mm lens when used with an APS-C sensor, it's essentially an old standard lens, and you might enjoy the bokeh at its widest aperture. For shooting, the camera was set to aperture-priority auto and allowed shutter release. A filter and rear lens cap are included. Price is not negotiable. No returns or refunds. Shipped via Yu-Yu Mercari delivery service.