Begin with fit, protection level, access, material quality, and brand reliability. Consider whether you want an official Sony leather case or a trusted third‑party option, and ensure the size suits the a6400 body with any grip. Check that the case provides easy access to batteries, memory cards, ports, and controls, and choose a closure and interior lining that match how you shoot—travel, daily use, or studio work. Look for a reputable brand and a finish that fits your style and level of protection.

Leather type and construction influence durability and feel. Decide between genuine leather and PU leather, and pay attention to thickness and how it impacts grip and protection. Look at stitching quality, reinforced corners, and the finish of edges; a soft, non-scratch lining helps protect the camera surface. Also consider how the material ages, colorfastness, and whether the design supports your preferred fastening or strap options.

Beginners usually prioritize light protection and easy access for quick shots, while pros seek rugged protection and fast, secure access even in demanding conditions. Choose a slim, simple design for everyday use if you’re new, or a more robust, well‑padded option if you routinely shoot in tough environments. Alignment with your shooting style and grip size will guide the best leather case choice for the a6400.

Keep the leather clean with a dry microfiber cloth and condition genuine leather occasionally to prevent cracking. Avoid excessive moisture and heat, and ensure openings line up with the camera’s battery door, memory card slot, HDMI port, and any external accessories. If you use a vertical grip or extra accessories, verify that the case still provides access and doesn’t interfere with mounting or handling.

Brand reputation matters—prefer official Sony leather cases or well‑regarded third‑party series. Look for clear material claims, warranty or return policies, and real user reviews focused on fit with the a6400 body. Consider the brand’s other photography accessories to gauge long‑term compatibility and support, and choose a series that matches your style and protection needs.

Avoid selecting by appearance alone or ignoring fit with your grip and lenses. Don’t assume any leather case will perfectly match the a6400 body without checking cutouts and clearance. Don’t neglect port access and battery/card doors, and beware of cases with weak stitching or overly bulky designs that hinder handling.