Well, after almost missing recording the ISS transit due to some confusion about how the Movie shooting switch operates on the Canon 7D, I finally managed to run a quick test today.
As you can see from the scan from the 7D Manual:
- Step 1 indicates that the reflex mirror will flip up when the Live View shooting/Movie shooting switch is switched to the Movie shooting position.
- Step 3 indicates that the (first) press of the START/STOP button will then begin the recording.
My experience was as follows:
- Step 1 – setting the Live View shooting/Movie shooting switch to the Movie shooting position did NOT cause the reflex mirror will flip up.
- The first press of the START/STOP button caused the reflex mirror will flip up.
- The second press of the START/STOP button then began the recording.
What gave the game away is that:
- After the first press of the START/STOP button, the red LED “access lamp” at the rear of the camera did NOT “blink” to indicate that data was being written to the CF Card.
- The second press of the START/STOP button then caused the “access lamp” to blink thus capturing the transit of the ISS across the face of the Sun.
It would appear that the Canon Manual describes the correct behaviour with a camera lens fitted whereas the behaviour when fitted to a telescope is how I experienced it, as the telescope does not communicate with the 7D body.
It pays to do a dry run before the main event!
Cheers
Dennis