PrimaLuceLab ALTO-3, cover motor for large GIOTTO models
Optional motor for opening and closing the GIOTTO 430. Check the mounting, clearance, and 12-volt power supply; the assembly is not light-tight for dark skies.
CHF 765.60
The PrimaLuceLab GIOTTO 430 provides an adjustable light source for capturing flat-field calibration images from a telescope.
CHF 933.05incl. Swiss VAT
Part no. FLAT-0010
Will be ordered for you
Timeframe: 10 days to 3 weeks
Estimated shipping: Between November 26 and December 1, 2026
The PrimaLuceLab GIOTTO 430 provides an adjustable light source for capturing flat-field calibration images from a telescope.
The panel has a maximum illuminated diameter of 430 mm. PrimaLuceLab specifically recommends using it with reflectors up to 390 mm in diameter, ensuring that the illuminated area remains larger than the aperture to be covered. Flat tests are used to identify illumination defects, such as vignetting, as well as shadows caused by dust in the optical system.
The GIOTTO 430 has a 100-mm unlit central area used to hold the diffuser in place. It is designed for reflectors with a central obstruction suitable for this configuration. PrimaLuceLab excludes refractive lenses, which do not have this obstruction. Also check the outer mounting diameter: the manufacturer’s page contains conflicting values that require confirmation before installation.
The lighting uses LEDs with a color temperature similar to sunlight and a diffuser designed to distribute the light. The brightness is adjustable across 100 levels, from 0 to 100 percent. This adjustment allows you to find the right lighting for your shooting settings and the filters you’re using, without having to set a fixed exposure time for the panel.
The USB-C port allows you to connect the panel to an EAGLE or a Windows computer. PLAY provides control functions and the ability to download calibration files. An ASCOM driver also allows it to be used with compatible third-party software, enabling integration into an existing astrophotography setup.
The built-in Wi-Fi provides access to the Virtual HandPad from a smartphone or tablet. This makes it possible to turn on the panel, adjust its brightness, and recall saved settings without using a physical remote control. The choice of control mode does not change the requirement for a 12-volt power supply for the device.
GIOTTO is secured in front of the telescope using the screws provided. This setup eliminates the need to hold the panel in place throughout the calibration sequence. The plastic screws are designed not to scratch the tube while holding the panel in place, though you should still check the position of the assembly.
A compatible ALTO motor can be added to move the panel and use it as a remote-controlled cover. The motor remains optional for this panel model sold alone. Installation depends on the tube, the support bar, and the space required for movement; the mere presence of a dovetail joint does not determine the entire assembly.
To select this size, first check the area to be illuminated, then the outer diameter and the mounting points. Next, verify the power supply and control software to be used. The panel provides calibration lighting: it is not a camera, an optical corrector, or a guarantee of automatic defect removal without image processing.
| Reference | PLLGIOTTO430 |
|---|---|
| Maximum illuminated diameter | 430 mm |
| Lighting | LED and diffuser |
| Setting | 100 levels, from 0 to 100 % |
| Power supply | 12 V |
| Connections | USB-C and Wi-Fi |
| Software | PLAY, ASCOM driver |
| Mass | 2.7 kg |
| ALTO Engine | Optional |
| Unlit central area | 100 mm |
| Prescription glasses | Not compatible |
PrimaLuceLab Official Fact Sheet
Manufacturer's illustration
Here are a few accessories we've selected for this model, depending on your needs.
Optional motor for opening and closing the GIOTTO 430. Check the mounting, clearance, and 12-volt power supply; the assembly is not light-tight for dark skies.
