I have this Time-lapse + View Intervalometer unit for sale never used.
It is used to do time lapses from day to night or night to day.
If your interested do a search on it to understand how it works and if it is for you.
$320 Posted in Australia.
There is a dedicated Facebook page for the users.
https://www.facebook.com/groups/3956...?ref=bookmarks
http://www.timelapseplus.com/buy/tim...intervalometer
http://www.photographyblog.com/news/...ntervalometer/
https://www.bing.com/videos/search?q...FFE9&FORM=VIRE