Pegasus Astro FlatMaster 150L Wi-Fi is a precision LED flat field panel designed to produce clean, repeatable flat calibration frames for deep-sky astrophotography and photometric imaging. It provides a uniform illumination source for telescopes up to 150mm (5.9") aperture and supports both USB and Wi-Fi control.

Calibration guidance: Accurate flat frames are essential for removing vignetting and dust artefacts. A detailed step-by-step guide is available below, along with a downloadable PDF for offline reference.

How to Take Flat Calibration Frames for Astrophotography  |  Download Flat Calibration Guide (PDF)

Uniform illumination for accurate flats

Flat frames correct vignetting, dust motes, and uneven field illumination introduced by the optical train and camera sensor. A dedicated flat panel ensures consistent, repeatable calibration without relying on improvised light sources.

Dimmable brightness (0–100%)

The FlatMaster 150L offers fully adjustable brightness from 0 to 100%, allowing you to precisely match exposure times to your optical system and filters. Brightness levels can be stored per filter and recalled instantly.

The panel is capable of very high output, supporting practical exposure times even with narrowband filters — typically 2–3 second flat exposures at f/7 using 3nm filters.

USB and Wi-Fi control

Power and control are provided via a single USB Type-B cable, simplifying cable management. In addition, the FlatMaster 150L includes integrated Wi-Fi, allowing wireless control from a phone, tablet, or computer.

USB and Wi-Fi can be used independently or simultaneously, offering flexibility for both fixed observatories and portable imaging rigs.

Web-based control dashboard

Once connected to the FlatMaster Wi-Fi hotspot, brightness can be controlled through a built-in web interface by entering flatmaster.local in any browser. This operating system–independent dashboard works seamlessly alongside USB control.

Manual operation

A built-in push button allows manual adjustment through multiple brightness levels, providing quick control when software operation is not required.

Software compatibility

The FlatMaster 150L is fully compatible with major astrophotography and automation platforms and supports modern control standards.

• Nighttime Imaging ‘N’ Astronomy (N.I.N.A.)
• Sequence Generator Pro (SGPro)
• Voyager Astrophotography Automation
• Astrophotography Tool (APT)

Supported protocols: ASCOM Alpaca, ASCOM 7 (classic ASCOM), and INDI.

Carry bag included

A dedicated carry bag is included, making it easy to transport and protect the FlatMaster 150L during travel and field use.

In the box

• 1 × FlatMaster 150 (for telescopes up to 150mm / 5.9")
• 1 × Carry bag
• 1 × USB2 Type-B cable (1.8m)

Technical specifications

Quick Installation Guide (FlatMaster 150/250)

Flat Calibration Frames Howto – NINA Guide