Kodak DCS 410 - Manual (Page 184)

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7-42  Reference — Camera G
2. Turn off the camera.
3. Remove the lens from the camera.
4. Turn on the camera.
5. Set the camera to manual exposure mode.
6. Select the bulb setting.
7. Press and hold the shutter release button; the shutter stays open, and
the imager is visible through the lens mounting flange.
CAUTION: Do not attempt to clean the imager while the camera is in
this state; the shutter can be damaged if you release the shutter button
while any object is in the opening.
Imager
(visible through
lens mounting flange)
Lens mounting flange