The main telescope is a Refractor, with a 228 mm diameter objective lens (2025 mm focal length). The lens is specifically designed to work best at the wavelength of the H-alpha line. Actual resolution at the solar surface provided by this telescope is around 400 kilometers. This is the instrument used for high-resolution imaging in both white-light and H-alpha. The instrument focuses on sectors of the solar disk where targeted phenomena occur. The optical formula allows for a very good image quality when coupled with the H-alpha solar filter and when local seeing conditions allow for imaging. Due to the specific operating parameters of the instrument, the telescope is fitted with a high-precision 100 mm diameter Energy-Rejection filter mounted inside the truss structure; this is needed as not too much energy in the UV and IR parts of the spectrum can pass directly to the H-alpha filter. The lens was ordered from the US-based company iStar Optical, while the structure of the refractor was designed and constructed at the ISS.

The secondary instrument is a refractor with 150 mm diameter and 900 mm focal length (Teleskop Service-Optics 6" f/5.9). It provides an actual resolution at the solar surface of 600 kilometers, enough to properly image the solar granulation and small details in sunspot groups, and to keep a statistic of the Wolf Number. It can be used in both white-light and H-alpha.

Model: iOptron CEM 60. Weight: 12.3 kg (mount head only). Max payload of 27 kg. The positioning accuracy and good tracking allows for long-term solar observation at high magnifications.

The Hydrogen Alpha filter used for chromospheric imaging (Daystar Instruments QUARK of approx. 0.5 Å bandwidth). This is a temperature-controlled H-α filter (λ=656.3 nm) with electronic heating/cooling system.

A CMOS Sensor (IMX174LLJ CMOS) with a resolution of 2.3MP - 1936 x 1216 pixels. The pixel size is 5.86 µm. This is a high-performance camera used in astrophotography especially for planetary imaging. The relatively large sensor and pixel size translate in a high Quantum Efficiency and as such a low readout noise. A fast frames-per-second ability (up to 100 fps on USB 3 connection) is also a great advantage, as high-resolution solar imaging is done in short bursts with high frame rates.

This is a specific filtering unit that allows for safe imaging of the Sun in white light. The use of this filtering unit allows for highly contrasted and excellent resolution of the solar photosphere. It is based on a prism that allows for only 4.6% of the incoming light to be reflected to the imaging sensor, with no distortions or other effects that are specific for normal filters that transmit light.

This is an optical filter that allows for only a very small part of the solar spectrum to pass to the sensor, more specifically the 540 nm wavelength with a band-pass of 10 nm. It allows to visualize the solar photosphere details (sunspots, solar granulation).

Airylab´s Solar Scintillation Monitor (SSM) is the only commercially available daylight seeing analysis system at the moment. Using this device, the seeing value can be instantly be measured in arc seconds at any observatory location. Furthermore, the high-speed readout of the SSM and computer control (via a dedicated software) makes it possible to trigger the acquisition for high-resolution imaging whenever the seeing conditions are suitable, thus avoiding the unnecessary fill-up of the storage devices with unusable data. At the moment one such device is mounted permanently on the rooftop of the Space Science Institute and serves as the basis for the local conditions’ analysis.