FlatMaster 250L Wi-Fi
This is the updated version of our Pegasus Astro FlatMaster 250L, our bigger, slimline, flatfield panel with new WI-Fi capabilities. It provides a uniform source of illumination for up to 10-inch telescopes and produces high-quality flat field frames for astrophotography and photometric captures.
Dimmable Panel
Unlike other panels in the market, the FlatMaster can adjust its brightness from 0 to 100%. Forget sheets of paper between your telescope and the panel. Remote control the brightness of your panel. Store the brightness per filter and immediately retrieve the value you need.
The Flatmaster 250L can go up to very high brightness levels so it can easily support short exposures (2-3 seconds at f/7) with 3nm narrowband imaging filters

Manual Button
The FlatMaster has a small push button that sets different gradual levels of brightness. In case you would like to manually operate the FlatMaster, no problem, just click the push button to control the brightness.
FlatMaster Wi-Fi Web Dashboard
Once connected to the FlatMaster Wi-Fi hotspot, you can access the control the panel light brightness by simply entering “flatmaster.local” into any web browser
This feature is operating system-independent and works seamlessly alongside USB control, offering flexibility and convenience across a wide range of setups.

FlatMaster is supported by most popular imaging software like SGPro, APT Voyager and N.I.N.A

Sequence Generator Pro (SGPro)

Voyager Astrophotography Automation

Astrophotography Tool (APT)

Nighttime Imaging ‘N’ Astronomy (N.I.N.A)
In the Box
1 x FlatMaster 250L (suitable for any telescope with aperture up to 250mm or 10 inches) |
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1 x Cable USB2 Type B 1.8m |
ASCOM and INDI support
FlatMaster 250 supports the latest ASCOM 7 and INDI framework.


Technical Specification
Type | Led Light Panel (White) |
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Dimmable | Yes – (0-100%) |
Material | Strong black ABS plastic |
Manual Push Button | On each click applies a different brightness level |
Usable diameter of circle | 250mm / 10 inches |
Power requirements | 5V DC provided by USB mini cable (500mA max) |
Size | Diameter 250mm x 8mm thickness |
Weight | 840g |
Wi-Fi Capabilities | Access Point or Client (at 2.4GHz) |