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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Flat Panels

Flat frames remove vignetting, dust shadows and uneven illumination, and they are the calibration step that most visibly improves an image. Getting them right depends entirely on even illumination across the aperture, which is what a flat panel provides and what a twilight sky or a white t-shirt provides only approximately. David Astro carries flat panels in Canada, in stock, with fast shipping across Canada and worldwide.

Panel size should suit your aperture and brightness should be adjustable for narrowband work. Tell us your telescope and filters and we will specify one.

Filters

Baader Planetarium FFB 450 - FlatFieldBox with 450mm Clear Aperture
$2,620.00 - $7,290.00
$2,620.00 - $7,290.00
$2,620.00 - $7,290.00
$2,620.00

Baader Planetarium FFB - FlatFieldBox

Options available

Available with 450, 650, 850 or 1250mm Clear Aperture Flicker-Free, Dimmable Illumination Full-Spectrum Light Source for All Filters Robust, Obser...

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$2,620.00 - $7,290.00
$2,620.00 - $7,290.00
$2,620.00 - $7,290.00
$2,620.00
$85.00 - $99.00
$85.00 - $99.00
$85.00 - $99.00
$85.00

Daystar Flat Cap Diffuser for Solar Imaging

Options available
14 variants in stock

Creates Uniform Flat Fields for Solar Imaging Spun Aluminum Mounting Ring for Durability High-Quality Polymer Diffuser Available for Telescope Tub...

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$85.00 - $99.00
$85.00 - $99.00
$85.00 - $99.00
$85.00
$625.00 - $625.00
$625.00
$625.00 - $625.00
$625.00

Optec Alnitak Flat-Man L Large Flat Fielder

OTC-19058
1 in stock

The Flat-Man L is the big brother of the Flat-Man, for telescopes in the 8-12.5" range. The Flat-Man L uses the same electroluminescent technology ...

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$625.00 - $625.00
$625.00
$625.00 - $625.00
$625.00
$1,695.00 - $2,895.00
$1,695.00 - $2,895.00
$1,695.00 - $2,895.00
$1,695.00

Optec Alnitak Flat-Man XL-2 Large Flat Fielder

Options available

Re-designed and re-introduced in 2020, Optec's new Flat-Man XL-2 electroluminescent calibration panels make it easy to obtain your flat-field calib...

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$1,695.00 - $2,895.00
$1,695.00 - $2,895.00
$1,695.00 - $2,895.00
$1,695.00
$575.00 - $595.00
$575.00 - $595.00
$575.00 - $595.00
$575.00

Optec Alnitak Flip-Flat 270 Flat Fielder

Options available

Optec has partnered with Chris White of Overcast Observatory to re-design the Flip-Flat electroluminescent calibration panel mechanical design. Th...

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$575.00 - $595.00
$575.00 - $595.00
$575.00 - $595.00
$575.00
$212.00 - $212.00
$212.00
$212.00 - $212.00
$212.00

Pegasus Flatmaster 150 WiFi -Dimmable EL Flat Panel

PEG-FLTMSTR150L-WiFi
2 in stock

Produces uniform flat fields for telescopes up to 150mm (5.9 inches) in aperture Fully dimmable from 0% to 100% for precise exposure control Integ...

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$212.00 - $212.00
$212.00
$212.00 - $212.00
$212.00
$428.00 - $428.00
$428.00
$428.00 - $428.00
$428.00

Pegasus FlatMaster 250 Wifi - Dimmable EL Flat Panel

PEG-FLTMSTR250L-WiFi
1 in stock

Provides uniform illumination for telescopes up to 250mm (10 inches) Features 2.4GHz Wi-Fi for remote control from any web browser Fully dimmable ...

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$428.00 - $428.00
$428.00
$428.00 - $428.00
$428.00
$492.50 - $492.50
$492.50
$492.50 - $492.50
$492.50

Pegasus FlatMaster Neo 120

PEG-FLTMSTR120-NEO
1 in stock

Produces uniform flat fields for telescopes up to 120mm Fully dimmable from 0-100% for broadband and narrowband filters Retractable servo-driven l...

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$492.50 - $492.50
$492.50
$492.50 - $492.50
$492.50
$495.00 - $495.00
$495.00
$495.00 - $495.00
$495.00

PrimaLuceLab ALTO-1 Telescope Cover Motor for GIOTTO up to 220mm

PLL-PLLALTO1

Automates telescope opening and closing Designed for GIOTTO flat field generators up to 220mm USB-C and WiFi connectivity ASCOM CoverCalibrator dr...

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$495.00 - $495.00
$495.00
$495.00 - $495.00
$495.00
$595.00 - $595.00
$595.00
$595.00 - $595.00
$595.00

PrimaLuceLab ALTO-2 Telescope Cover Motor for GIOTTO up to 320mm

PLL-PLLALTO2

Motorizes GIOTTO Flat Field Generators For Telescopes with Apertures up to 320mm USB-C and WiFi Connectivity ASCOM CoverCalibrator Compatible 12V ...

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$595.00 - $595.00
$595.00
$595.00 - $595.00
$595.00
$895.00 - $895.00
$895.00
$895.00 - $895.00
$895.00

PrimaLuceLab ALTO-3 Telescope Cover Motor for GIOTTO larger than 320mm

PLL-PLLALTO3

Motorizes GIOTTO Flat Field Generators larger than 320mm Enables fully remote telescope opening and closing Connects and is controlled via USB-C o...

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$895.00 - $895.00
$895.00
$895.00 - $895.00
$895.00
$8.00 - $8.00
$8.00
$8.00 - $8.00
$8.00

PrimaLuceLab Cable Locking Clip (CLC) for ALTO

PLL-PLLALTOLOCK

Secures ALTO-to-GIOTTO Cable Connection Prevents Accidental Disconnections During Remote Operation Official PrimaLuceLab Spare Part Ensures Reliab...

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$8.00 - $8.00
$8.00
$8.00 - $8.00
$8.00
$6.00 - $6.00
$6.00
$6.00 - $6.00
$6.00

PrimaLuceLab Cable Locking Clip (CLC) for GIOTTO

PLL-PLLGIOTTOLOCK

Secures USB and Power Cables Designed for PrimaLuceLab GIOTTO and ALTO Prevents Accidental Disconnection Genuine PrimaLuceLab Spare Part Descri...

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$6.00 - $6.00
$6.00
$6.00 - $6.00
$6.00
$275.00 - $275.00
$275.00
$275.00 - $275.00
$275.00

PrimaLuceLab GIOTTO 120 Smart Flat Field Generator

PLL-PLLGIOTTO120

Produces uniform illumination for telescopes with apertures up to 120mm Sun-like color temperature for accurate flat field calibration Adjustable ...

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$275.00 - $275.00
$275.00
$275.00 - $275.00
$275.00
$315.00 - $315.00
$315.00
$315.00 - $315.00
$315.00

PrimaLuceLab GIOTTO 150 Smart Flat Field Generator

PLL-PLLGIOTTO150

Generates a 150mm diameter circle of uniform, dimmable light Securely fits telescope tubes with an external diameter from 112mm to 174mm 100-step ...

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$315.00 - $315.00
$315.00
$315.00 - $315.00
$315.00
$365.00 - $365.00
$365.00
$365.00 - $365.00
$365.00

PrimaLuceLab GIOTTO 185 Smart Flat Field Generator

PLL-PLLGIOTTO185

Illuminated Diameter: 185mm Recommended Telescope Aperture: Up to 150mm Compatible Tube Diameter: 147mm to 210mm Connectivity: USB-C and WiFi Brig...

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$365.00 - $365.00
$365.00
$365.00 - $365.00
$365.00
$435.00 - $435.00
$435.00
$435.00 - $435.00
$435.00

PrimaLuceLab GIOTTO 220 Smart Flat Field Generator

PLL-PLLGIOTTO220

Produces an evenly illuminated field for flat calibration frames Controllable via WiFi, USB-C, ASCOM, and PLAY software Adjustable brightness with...

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$435.00 - $435.00
$435.00
$435.00 - $435.00
$435.00
$495.00 - $495.00
$495.00
$495.00 - $495.00
$495.00

PrimaLuceLab GIOTTO 255 Smart Flat Field Generator

PLL-PLLGIOTTO255

Smart Flat Field Generator Adjustable Brightness Control Sun-like Color Temperature LEDs Connectivity: USB-C and WiFi Power: 12V DC Input Descr...

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$495.00 - $495.00
$495.00
$495.00 - $495.00
$495.00
$665.00 - $665.00
$665.00
$665.00 - $665.00
$665.00

PrimaLuceLab GIOTTO 285 Smart Flat Field Generator

PLL-PLLGIOTTO285

Smart flat field generator for uniform calibration frames Integrated LEDs with a Sun-like color temperature Adjustable brightness controlled via s...

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$665.00 - $665.00
$665.00
$665.00 - $665.00
$665.00
$895.00 - $895.00
$895.00
$895.00 - $895.00
$895.00

PrimaLuceLab GIOTTO 320 Smart Flat Field Generator

PLL-PLLGIOTTO320

Large illuminated panel for telescopes up to 320mm Sun-like color temperature LED array 100-step digital brightness control Fits tube diameters fr...

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$895.00 - $895.00
$895.00
$895.00 - $895.00
$895.00
PrimaLuceLab GIOTTO 430 with ALTO-3 Telescope Cover Motor
$1,990.00 - $1,990.00
$1,990.00
$1,990.00 - $1,990.00
$1,990.00

PrimaLuceLab GIOTTO 430 with ALTO-3 Telescope Cover Motor

PLLGIOTTO430ALTO3

Automated flat field generator and motorized dust cover Enables fully remote and robotic observatory operation Protects telescope optics from dust...

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$1,990.00 - $1,990.00
$1,990.00
$1,990.00 - $1,990.00
$1,990.00
$1,750.00 - $1,750.00
$1,750.00
$1,750.00 - $1,750.00
$1,750.00

PrimaLuceLab GIOTTO 560 Smart Flat Field Generator

PLL-PLLGIOTTO560

Generates flat fields for telescopes up to 560mm in aperture Sun-like color temperature LEDs for accurate calibration USB-C and WiFi connectivity ...

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$1,750.00 - $1,750.00
$1,750.00
$1,750.00 - $1,750.00
$1,750.00
PrimaLuceLab GIOTTO 560 with ALTO-3L telescope cover motor
$2,645.00 - $2,645.00
$2,645.00
$2,645.00 - $2,645.00
$2,645.00

PrimaLuceLab GIOTTO 560 with ALTO-3L telescope cover motor

PLLGIOTTO560ALTO3L

Automated Flat Field Generator and Motorized Cap Remote Operation via USB-C Sun-Like, Full-Spectrum LED Illumination Precision Light Diffuser for ...

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$2,645.00 - $2,645.00
$2,645.00
$2,645.00 - $2,645.00
$2,645.00
PrimaLuceLab GIOTTO for Origin, Smart Flat Field Generator
$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00

PrimaLuceLab GIOTTO for Origin, Smart Flat Field Generator

PLLGIOTTORG6

Intelligent flat field generator designed exclusively for the Celestron Origin Enables precise, on-demand recalibration for superior image quality...

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$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00

Flat Panels and Good Flat Frames

A flat frame records how your optical system illuminates the sensor. Anything uneven in the illumination source becomes an error baked into every calibrated image.

  • Electroluminescent and LED panels: Uniform emitting surfaces designed for even output edge to edge, which is the property that matters most.
  • Adjustable brightness: Essential for narrowband, where a panel bright enough for a luminance flat will saturate in seconds through a 3 nm filter.
  • Aperture sizing: The panel must cover the full aperture including any dew shield, since illuminating only part of the aperture produces a useless flat.
  • Target exposure level: Aim for roughly one third to one half of the sensor's full well, well clear of both the noise floor and the non-linear region near saturation.
  • Per-filter flats: Each filter needs its own flat frame, since dust and vignetting differ between them. Automation makes this practical.
  • Automated panels: Motorized covers that close and illuminate on command, allowing a remote rig to take flats without anyone present.

Why Choose David Astro for Flat Panels

A flat panel is only useful if it is even, correctly sized and dim enough for your narrowest filter.

  • Sized to your full aperture: We size including the dew shield, because a panel that covers only the objective gives an incorrect illumination pattern.
  • Dimming range checked for narrowband: We confirm the panel dims far enough for a 3 nm filter, which many general-purpose panels do not.
  • Flat workflow advice: We help you set target exposure levels and per-filter routines so your calibration actually works the first time.
  • Authorized dealer: Genuine panels with manufacturer warranty, in Canadian stock.
  • Ships from Canada: No duties or brokerage fees for Canadian orders.

Flat Panels in Canada — Frequently Asked Questions

Can I use sky flats instead?
You can, and twilight flats work well, but the sky brightness changes quickly and gradients across the field are common. A panel is repeatable and available at any hour, which matters in winter.
How bright should a flat be?
Target roughly one third to one half of your sensor's full well. Too dim and read noise dominates; too bright and you enter the non-linear region near saturation.
Do I need separate flats for each filter?
Yes. Dust motes sit on the filters themselves and vignetting differs slightly between them, so a flat taken through luminance will not correct a narrowband frame properly.
Does the panel need to cover the dew shield?
It needs to cover the full aperture as the optics see it. Illuminating only part of the aperture, or letting stray light in around the edge, produces a flat that makes your images worse.

Improving your calibration?

Tell us your aperture and filters and we will size a panel with the right dimming range. In Canadian stock, shipped worldwide.