It is difficult to get the "Holy Grail" sunrise, sunset, night to day time lapse right. The equipment needed to allow for smooth fluid parameter changes to compensate for changes in light can be expensive. Promo Systems Controller (£250/$329) and Timelapse+ (£290/$385) do it well but they are out of the budget of most enthusiasts.
The little device connects your smartphone to your camera and works some magic, seamlessly changing exposures to allow for smooth light transitions.
It works with most cameras like Canon, Nikon, Panasonic and Sonys and for $37/£35 it is a bargain, especially if you are just starting out and want to play around before investing in something more expensive.
Also check out our blog on techniques from finding the right place with the help of software and to hardware options to make your life easier - digislider.co.uk/blog/time-lapse
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