Coronado PST Calcium K Solar Telescope.

Coronado P.S.T. CaK is a truly remarkable telescope linking two of our most recent
technological breakthroughs. By combining the optical design of the price friendly P.S.T. with
the Calcium K line filters of our CaK 70 telescope we are again making solar discovery a real
and attainable aspect of Astronomy.

The unique CaK filter isolates a layer of the Sun that is below and slightly cooler than the
layer viewed with a Coronado Hydrogen Alpha filter. The transmission line is centered at
393.4 nanometers and is isolated using thermally stable interference filters. Given that this
telescope has a much smaller aperture than its bigger brother, the CaK 70 telescope, you
can anticipate a drop in resolution but not in contrast, safety, or quality. The magnificent
super granulation cells that gather and strengthen in this layer of the Chromosphere may not
be visible to all, as most humans eyes through the process of aging are not particularly
sensitive to this wavelength. The primary purpose of any CaK instrument is for imaging.

Due to the short wavelength of the CaK line some people may have difficulty seeing every
detail. However, imaging at this wavelength using standard cameras and webcams is
relatively easy and produces images that are readily viewable**.

• Aperture: 40mm
• Focal Length: 400mm
• F/Ratio: F/10
• Bandwidth: <2.2Å
• Thermal Stability: 0.005 Å/°C
• Safety Blocking: >10-5 from EUV/IR

Price - £429.00 + £7.50 p&p.

PST Hard Case - £42.00 + £7.50 p&p (free delivery if ordered with telescope).

We recommend the Orion TeleTrak Altazimuth Tracking Mount for use with the PST.
Compact, portable and easy to set up. See the Orion Telescope section of our online
catalogue for details.

The Astronomy Shop

1 Tone Hill. Wellington

Somerset TA21 0AU

United Kingdom

Telephone: +44 (0)1823 665510