Provides uniform illumination for telescopes up to 250mm (10 inches) Features 2.4GHz Wi-Fi for remote control from any web browser Fully dimmable from 0-100% for precise flat field exposures Ultra-slim 8mm profile and weighs only 840g Single USB cable for both power and PC-based control Manual push-button for quick, computer-free brightness adjustments Description FAQ Specifications In the Box Downloads Warranty Pegasus Astro FlatMasterL 250 with WiFi The Pegasus Astro FlatMasterL 250 provides a perfectly uniform light source across its 250mm usable diameter, engineered specifically for telescopes up to 10 inches in aperture. At only 8mm thick and weighing 840g, its slim profile adds minimal weight to your optical tube while enabling precise, remote-controlled flat fields. The panel's brightness is fully adjustable from 0-100%, powered and controlled by a single 5V DC USB cable drawing a maximum of 500mA. 250mm Panel: Uniform Illumination for 10-Inch Scopes Achieving flawless flat frames requires an evenly illuminated light source, and the FlatMasterL 250 is built to deliver just that. Its 250mm (10-inch) diameter fully covers the aperture of popular Schmidt-Cassegrains, Newtonians, and refractors in this size class. The strong ABS plastic construction ensures durability while maintaining a low weight of only 840g, preventing any significant impact on your telescope's balance. The panel can achieve very high brightness, allowing you to capture flats with even the densest narrowband filters in just a few seconds. This eliminates the need for cumbersome diffusers or stacking paper sheets to achieve the correct exposure, streamlining your calibration workflow before or after an imaging session. Dual Control: 2.4GHz Wi-Fi and USB Operation The FlatMasterL 250 integrates both Wi-Fi and USB control for maximum flexibility. You can connect directly to the panel's 2.4GHz Wi-Fi hotspot from any phone, tablet, or PC and adjust brightness through a simple web dashboard—no app installation required. This is ideal for remote setups or for making quick adjustments at the telescope without a dedicated laptop. For automated imaging sequences, the panel connects via a single USB cable that provides both power and control. It is natively supported by major astrophotography software, including N.I.N.A., Sequence Generator Pro, Voyager, and Astrophotography Tool (APT). A manual push-button on the unit also allows for stepping through preset brightness levels, offering a simple, computer-free way to operate the panel. How do I control the FlatMasterL 250 with my smartphone? You can connect your phone to the FlatMasterL 250's built-in 2.4GHz Wi-Fi hotspot. Once connected, open any web browser and navigate to `flatmaster.local` to access a web dashboard that allows you to adjust the panel's brightness from 0 to 100% remotely. Is the FlatMasterL 250 bright enough for narrowband filters? Yes. The panel is designed to reach very high brightness levels, enabling you to capture flat frames with short exposures (typically 2-3 seconds) even when using 3nm narrowband filters on telescopes with focal ratios around f/7. What software is compatible with the FlatMasterL 250? The FlatMasterL 250 is supported by the Pegasus Astro Unity Platform and most major astrophotography automation software, including: N.I.N.A (Nighttime Imaging 'N' Astronomy) SGP (Sequence Generator Pro) APT (Astrophotography Tool) Voyager Astrophotography Automation Can I use the FlatMasterL 250 on a telescope smaller than 10 inches? Absolutely. The 250mm (10-inch) designation indicates the maximum recommended aperture. It works perfectly for any telescope with an aperture up to that size, such as an 8-inch SCT or a 130mm refractor. How do I power the FlatMasterL 250 in the field? The panel is powered by a standard 5V DC USB connection and draws a maximum of 500mA. You can power it from a USB port on your laptop, a powered USB hub, or any portable USB power bank, making it easy to use at any remote observing site. What is the purpose of the manual push button on the FlatMasterL 250? The manual button allows you to operate the FlatMasterL 250 without connecting to a computer or Wi-Fi. Each press of the button cycles through different preset brightness levels, providing a quick and simple way to take flat frames if you are operating a simple DSLR setup without a PC. Usable Diameter 250mm / 10 inches Dimmable Range Yes (0-100%) Wi-Fi Control Yes, Access Point or Client (2.4GHz) Manual Control Yes, push button for brightness levels Power Requirements 5V DC via USB mini cable (500mA max) Dimensions 250mm Diameter x 8mm Thickness Weight 840g Material Strong black ABS plastic FlatMaster 250L × 1 USB2 Type B Cable (1.8m) × 1 Download Software Download Manual Pegasus Astro 2-Year Warranty
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