Sky-Watcher 0.77x Reducer for Esprit 150ED Triplet

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Sky-Watcher 0.77x Reducer for Esprit 150ED Triplet

£299.00

(1 Review)

✓ 2 year warranty

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Frequently bought with this product:

Sky-Watcher Esprit 150 ED PRO - Checked & Tuned

+ £4,749.00

About this product

Model: skywatcher_reducer_esp150
Part Number: 20096

Optically matched for the Sky-Watcher Esprit-150 ED Triplet refractor telescope.

Provides a fully illuminated and corrected 36mm image circle suitable for sensor formats up to APS-C.

This three-element focal reducer/flattener has a reduction factor of 0.77x. for imaging at f5.4.

55mm back focus for use with M48 Canon EOS or Nikon adaptor rings.

Includes a standard adaptor with M48 thread.

Removing the adaptor reveals an M71x1 internal thread with maximum 75mm back focus for self-made adaptor solutions.

Features & Specification

Three-element design
Fully Multi-Coated optics
36mm Imaging Circle
2-Inch filter compatible
75mm back focus or 55mm with supplied adaptor
M42x0.75 adapter (T2)
Green anodised aluminium screw-on end caps
Net weight 910g (with end caps)

Customer reviews

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Sky-Watcher 0.77x Reducer for Esprit 150ED Triplet

Tuesday, 2 March 2021 | Stephen

I purchased this to bring the FOV using a KAF 8300 CCD camera more in line with my existing APS-C CMOS camera. No supplied documentation in the box but all the info you need is in the FLO description. Spacing is critical to achieve good star shapes in the corners, but one bonus is that focus is achieved with only 16 mm of focus travel, vs 65 mm when using the SW F/F. The stars in my OAG camera are now elongated but PHD guides on them OK and that may just require some adjustment of the prism.
A cheaper alternative to buying another IMX 571 sensor camera, recommended.