| Joined: | Mon Apr 2nd, 2012 |
| Location: | South Lakeland, UK |
| Posts: | 4066 |
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I can see no reason why the flash wont fire when the tubes are used.
That's my take too.
Dan, have you tried the same combination, with extension tubes and without extension tubes, with the inbuilt flash, rather than your ring flash?
Not suggesting it as an alternative but as a way of eliminating the external flash.
I just get the feeling the camera could be 'taking over' when the extension tubes are fitted.
Have you altered the flash menu settings? A two button reset should return the flash settings to factory settings.
Also, try operating the flash not actually mounted on (or touching) the lens, both with the zoom and the micro 105. I am still thinking of the possibly missing earth return path when tubes are used in combination with the micro 105.
The standard method of cleaning the contacts is using an eraser, especially a pencil top mounted eraser which can get into the contacts without damaging anything. An alternative is a fibreglass tipped pen which can be used to scrub the contacts to clean them.
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Robert.