I combined one of these with my Startravel-80 refractor (also from First Light Optics) to form a guiding system for my Explorer 150P on a HEQ5 PRO mount.
You need to have a mount with a compatible ST-4 guide port, as well as a suitable guide scope.
It works as advertised. The screen on the back, while limited in what it can display, still does an overall good rendition of the star field and in most cases can guide on any star that it can see through the scope.
It's a very neat and capable solution to guiding and is a real help to DSLR users or other mobile setups where you may not want or need to bring a laptop along with you.
I used mine with a battery bag and the batteries would last 2-3 sessions before needing recharging or replacing. A separate 12v supply is needed (First Light Optics also sell these) if you wish to power the SynGuider from your portable power supply.
In summary - you'd want to buy this auto guider if you're looking for a quick and easy portable solution to the problem of guiding. If you want to take photographs that are longer than 60 seconds and don't want to use a laptop - get the SynGuider. It does the job well.
