What it does Provides DXstyle film recognition for reloadable film cassettes and containers so your camera can read film sensitivity and latitude automatically. Compatible with handroll pan film and bulk film loaded into reloadable 135format cassettes. Key benefits (why you need it) Restores automatic exposure: When you load handroll or bulk film into a cassette that otherwise has no DX coding, this product supplies the camera with film speed and latitude data so the camera's autoexposure system can operate correctly. Broad compatibility: Works with standard 135 (35mm) film cassettes, including 36EXP types that lack DX coding, letting you use bulk and handrolled stock in cameras that rely on cassette recognition. Avoids manual meter guessing: Eliminates the need to set ISO manually or estimate exposure when using nonDXcoded reloads, reducing exposure errors and wasted frames. Features and attributes Function: Adds film recognition capability to reloadable film cassettes/containers so cameras detect sensitivity (ISO) and exposure latitude automatically. Compatibility: Designed for 135 (35mm) film cassettes, including 36EXP formats and other standard 135 cassettes without DX coding. Works with handroll pan film and bulk film when loaded into a compatible cassette/container. Operation: Converts otherwise neutral or noncoded reloadable cassettes into units that provide the film data the camera's automatic exposure system expects. Fit: Meant to be used with standard 135format reloadable cassettes/containers; compatible with cassettes that do not have builtin DX information. Practical applications / use scenarios 1. Film photographers reloading bulk 35mm stock into reusable cassettes can add automatic ISO recognition so modern film SLRs and rangefinders can use their builtin metering without manual ISO entry. 2. Users of handroll pan film who load specialty film into neutral reloadable cassettes can ensure the camera receives correct sensitivity and latitude data for reliable autoexposure. 3. Photographers who maintain a mix of factory DXcoded cassettes and nonDX reloads can standardize workflows by converting noncoded containers to supply camera exposure systems with the same film data as factory cassettes. Why it stands out Directly addresses the common problem of using bulk or handrolled film in cameras that expect DXcoded cassettes by providing the missing film recognition data. Keeps camera metering and automatic exposure functioning as intended without changing film stock or camera settings. Compatibility note: Intended for use with standard 135 (35mm) film cassettes (including 36EXP types) and reloadable film containers that do not have DX coding. It enables the camera to distinguish film sensitivity and latitude data and feed that information into the camera's automatic exposure system.