The Baader Solar Projection Screen (BSPS) offers a safe way to project the sun and allows small groups to observe the sun together. The solar projection screen is ideal for observation of solar activity with sunspots in white light and for observation of the course of solar eclipses.
It consists of a rear projection screen and a T2 thread for connection to standard eyepiece projection attachments. With a suitable eyepiece, the screen provides a solar image that fills the 9x9 cm projection area. Sunspots can be seen, as can the darkening of the sun's edges and the progression of eclipses.
Unlike classic open projection screens, there is no risk of anyone reaching into the beam path or even looking into the eyepiece. The rear projection allows for a closed system. The screen can be connected to any telescope suitable for solar and eyepiece projection.
When the telescope is used on a tracking mount, the sun can be observed comfortably for several hours.
The projection screen is particularly helpful in public relations work, when other guests are constantly looking into the eyepiece of a telescope with its own solar filters: if the screen is attached to another small guide tube or finder, you can see whether the sun is still in the main telescope and at the same time show waiting guests what to expect.
