Sky-Watcher 0.77x Focal Reducer & Field Flattener for Esprit-120ED

Skywatchers Flattener 120

Keep your stars sharp to the edge
The Skywatchers Flattener 120 corrects curvature in the field of view of your telescope. Without this correction, stars toward the edge become stretched and out of focus. With the flattener, your images remain sharp, clear and true to nature across the entire field.

Ideal for photography with fast telescopes
With telescopes with short focal ratios, such as f/5 to f/7, and large camera sensors, you see the effect of image field distortion most strongly. The flattener turns your Esprit 120 into a true photographic machine, so your stars are sharp right to the edges of your image.

Easy to assemble
You place the flattener between your telescope and camera. It has an M48 threaded connection with 55 mm backfocus, perfect for DSLR cameras with a suitable bayonet adapter. If you remove the adapter, you can use an M71 × 1 threaded connection with up to 75 mm backfocus for homemade adapters.

Fast and fully corrected shots
The reducer/flattener has three lenses and a reduction factor of 0.77×. This makes your Esprit Apo faster, up to f/5.4, and creates a fully corrected 36 mm image circle. That's perfect for APS-C and full-frame cameras.

Solid and durable design
The flattener has an aluminum body and FMC coating on the lenses. It supports filters up to 2 inches and weighs only 910 grams. This makes it robust, lightweight and easy to use, so you can concentrate on getting the perfect shot.

Specifications

Capacity

General