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BST StarGuider 60º 25mm ED Eyepiece

£47.00

(1 Review)

✓ 2 year warranty

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About this product

Model: bst_sg_25
Part Number: SP10856

Please note BST StarGuider ED eyepieces are occasionally branded 'Astro Essentials'.

Remarkably high performance-per-£!

Features include two ED glass elements and fully multicoated edge-blackened optics for excellent colour, enhanced contrast, high light transmission and minimal ghosting.

The six-element / four-group design minimises field curvature for a nice flat field, even when used with telescope f-ratios as low as f5.

Modern twist-up eyecups, 16mm eye relief and 21mm diameter eye-lens makes them comfortable to use, even when wearing eyeglasses.

The tactile rubber grip and milled indentations make them easy to handle in the dark and the 1.25“ nosepiece includes a safety undercut so the eyepiece is less likely to slip out of the focuser. The 1.25” nosepiece is also threaded to accept 1.25“ astronomy filters.

FEATURES

Two ED glass elements minimise chromatic aberration.
All air-to-glass surfaces are fully multicoated for high contrast, high light transmission and minimal ghosting.
Blackened lens edges reduce internal reflections and further increase contrast.
Six-element / four-group design minimises field curvature for a nice flat field.
16mm eye relief (suitable for spectacle wearers).
Large 21mm eye-lens diameter for comfortable observing.
Convenient screw-out eye cups.
Tactile rubber grip for easy handling in the dark.
1.25“ nosepiece with milled safety undercut.
Accepts 1.25“ astronomy filters.
Suitable for use with telescope focal-ratios f/5 and above.