Based on the chart cast when I first read your question, I think the camera is with your sister.
The camera is the moveable property (second house) of your father (fourth house). The second from the fourth is the fifth house and in my chart that is ruled by Jupiter (Pisces). Jupiter therefore symbolises the camera. I find Jupiter in the third house, which is the house of siblings and neighbours (as well as short journeys). Given that your sister is involved with the camera the most likely interpretation is that she currently has the camera, whether she knows it or not.
The third house is also ruled by Saturn (Capricorn) which means that Jupiter is in Fall, so I would interpret this to mean that the camera is not in particularly good physical condition (though that's not suprising at that age).
As Saturn also rules the fourth, (Aquarius) Saturn is an appropriate symbol for your father.
Although Jupiter is retrograde (which might symbolise the return of the camera) There is no obvious aspect with you or your sister or father. However if you and your sister have a mutual friend it's possible that they might be instrumental in the return (Translation of light by the Moon from Jupiter (camera) to Mercury (ruler of the eleventh house of friends).
Such a friend might have seen the camera at your sister's and remember if prodded!
I'll have a look at the Melbourne version of the chart and see if that throws up any more insights.
Edited to Add:
I should have mentioned that Capricorn signifies dark or hidden places, so the camera is obscured and probably has been for a long time.
I should also point out the 'late' ascendant, being 29 degrees 14 minutes of Libra. The considerations before judgement would suggest that a judgement at this time is too late - that is it is very likely that the camera cannot be recovered in any reasonable time frame, if at all. However I'm sure that Lilley would have made a judgement.
Finally a second check of the chart reveals that the Moon will aspect Mars before Mercury. Now Mars is ruler of your Dad's fourth, his house of buried treasure (lost property) so that might strengthen the chance of a recovery. The Moon is slow in motion, so it won't be soon.