Information...

'eV' or EEVA (Electronically Enhanced Visual Astronomy) is an exciting new way of viewing objects, which are otherwise mostly drowned out by the effects of light pollution.

The two systems which are commercially available, the Unistellar and the Vaonis Stellina, replace the conventional eyepiece with a digital camera. The captures images are aligned and stacked together automatically, allowing the resultant image to develop over time. In the case of the Unistellar, the image can then be viewed through a eyepiece display, or on a mobile phone / tablet.

Similar set-ups can be used to 'live-stack' during a standard astrophotography session, but these eV systems have the advantage of simplicity, are low-maintenance and can be set-up quickly. On the downside however, they are (for the time being) expensive and perhaps aren't suited for the 'hours' long imaging required for regular Deep-Space astrophotography.