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Astrel AST-FBC-A Flatbox Controller for All Astrel Astrophotography Cameras

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Flats generation can be a challenging operation. Most astrophotographers use an instrument called flatbox, which is an uniformly illuminated light source that covers the aperture of the telescope. The flatbox light is strong, and the exposure required for a flat frame is in the order of a few seconds, while a light frame usually is exposed for several minutes.

This difference is relevant because, in a few seconds exposure with strong light, the opening and closing movement of the shutter, which are not very fast and often not perfectly uniform, could generate unwanted gradients of light in the flat frames. Of course this is not true with light frames, where exposure is much longer than the shutter movements and the light level hitting the sensor is low. The normal solution is to dim the light of the flatbox and keep the exposures long enough to avoid gradients.

The flatbox controller is a new way of taking flat frames: with this small box your AST8300-B or AST16200-B  will directly power your flatbox and switch it on and off when needed.

AST8300-X integrates this function, so no further accessories are needed to control the flatbox with the camera. 

When taking flats using the flatbox controller and the Flat Maker app, the exposure is done switching on and off the flatbox light instead of opening and closing the shutter of the camera. This way there are no shutter movements, so no gradients can be generated and flats are always perfectly uniform, even with sub second exposures.

The flatbox controller box must be plugged to the ext2 camera connector, and has a cable that must be connected to the flatbox in place of its power supply using one of the four interchangeable plugs. To be compatible with the controller, the flatbox supply must be 12V.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Typographical Errors and Order Cancellations

Telescopes Canada reserves the right to cancel an order due to an error in pricing by Telescopes Canada or one of our suppliers, equipment being no longer obtainable, or other events which are out of our control.

Client-Initiated Cancellations

Client-initiated order cancellations are accepted prior to delivery of the equipment to the customer, thereafter it is a return.

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