FC.SDK 1.3.371

FC.SDK — Free Canon SDK

Canon EOS camera control via PTP over USB and WiFi — pure managed C#, no EDSDK binary required.

Why

Canon's EDSDK is closed-source, non-redistributable, and Windows-only. FC.SDK implements the same camera control capabilities using the PTP protocol (reverse-engineered by the libgphoto2 project), working over USB and WiFi on any platform.

Transports

Usage

using FC.SDK;
using FC.SDK.Canon;

// Connect via WPD (Windows, zero-install)
await using var camera = CanonCamera.ConnectWpd(deviceId);
await camera.OpenSessionAsync();
Console.WriteLine($"{camera.Model} — serial {camera.SerialNumber}, battery {camera.BatteryLevelPercent}%");

// Typed settings — no magic uint32s
await camera.SetISOAsync(EdsISOSpeed.ISO_800);
await camera.SetShutterSpeedAsync(EdsTv.Tv_1_125);
await camera.SetApertureAsync(EdsAv.Av_2_8);

// Snap and download (auto-detects CR2, CR3, JPG)
await camera.SetSaveToAsync(EdsSaveTo.Host);
camera.ObjectAdded += async (s, e) =>
{
    var (_, fileName) = await camera.GetObjectFileNameAsync(e.ObjectHandle);
    await using var fs = File.Create(fileName ?? "capture.cr2");
    await camera.DownloadAsync(e.ObjectHandle, fs);
    await camera.TransferCompleteAsync(e.ObjectHandle);
};
camera.StartEventPolling();
await camera.TakePictureAsync();

// Bulb exposure (mode dial must be on B)
await camera.SetMirrorLockupAsync(EdsMirrorUpSetting.On);
await camera.BulbStartAsync();
await Task.Delay(TimeSpan.FromSeconds(120));
await camera.BulbEndAsync();

// Live view + manual focus
await camera.StartLiveViewAsync();
var (error, jpeg) = await camera.GetLiveViewFrameAsync();
await camera.DriveLensAsync(EdsDriveLensStep.NearSmall);
await camera.StopLiveViewAsync();

Architecture

CanonCamera              (public async API)
  CanonPtpSession        (Canon vendor opcodes 0x9xxx)
    PtpSession           (transaction management, half-duplex lock)
      IPtpTransport      (WPD / USB / PTP-IP)

Feature Matrix

Canon.EDSDK (SharpAstro/Canon.EDSDK) is a .NET binding around Canon's native EDSDK.dll. It requires the vendor binary and only runs on Windows. FC.SDK reimplements the PTP protocol directly and needs no vendor DLLs.

Supported Cameras

Tested with Canon EOS 6D. Should work with any Canon EOS body that supports PTP — the Canon vendor opcodes are shared across the EOS lineup.

AOT Compatible

The entire library including the WPD transport is NativeAOT compatible — no dynamic, no reflection, all COM interop via [GeneratedComInterface].

License

MIT