The optics Coronado ST 40/400 PST:

The PST is the latest innovation from Coronado. This "small" telescope is another step towards the goal of making high-quality solar observation possible for everyone. H-alpha telescopes with a bandwidth of less than 1 Angstrom were so far hardly affordable for the amateur. With the PST, however, there is such a system, which is also thermally stable and does not require slow opening ratios. This complete H-alpha telescope can not be used for nighttime observation, as the filter components can not be removed for safety reasons. Safety comes first, and Coronado guarantees the correct removal of harmful solar radiation, such as UV or IR, before the remaining light enters the eyepiece. The PST incorporates the same technology as the SolarMax series, with some specific features that allow it to be offered at a very reasonable price. With the PST you can observe protuberances, filaments, sunspots and many more details of the sun's surface.


Properties of optics:

Bandwidth: <1 angstrom
Temperature drift: 0.005 A / K
Power protection:> 10 ^ -5 from UV to IR

Scope of delivery of the optic Coronado ST 40/400 PST:

optical tube with 40mm aperture and 400mm focal length
Eyepiece MA 20mm (1.25 ")
impact-resistant foam insert

Tech data:

Type: refractor
Type: Solar H-Alpha
Opening (mm): 40
Focal length (mm): 400
Aperture ratio (f /): 10
Resolution (arcseconds): 2.88
Light gathering power (-fold of a 7mm pupil): 30
Max. Meaningful magnification (-fold): 80
Tube weight (kg): 1.6
Bandwidth (angstrom): <1.0

Okularauszug
Type: Coronado PST
Connection (eyepiece side) (inch): 1.25 "

mount
Mounting type: without mount
GoTo control: no
Type: OTA
Tracking: no

Included accessories
Eyepieces 1.25 '': MA 20mm

General:

Total weight (kg): 2
Series: PST
Special recommendation: Yes

Application areas:
Moon & Planets: no
Fog & galaxies: no
Nature observation: no
Astrophotography: yes
Sun: yes

The protuberance (see pictures) was taken by Reinhard Pankrath with a PST using a Barlow lens.