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item4

Excellent eyepiece for most telescopes.
Prefers an f ratio of f6 to f20. Small eye relief on shorter focal length eyepieces 

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item10a1

4mm OrthoscopicO4
31.7mm fitting

 Price:   £55.00

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6mm Orthoscopic O6
31.7mm fitting

Price:   £52.00

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9mm OrthoscopicO9
31.7mm fitting

Price:   £52.00

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12.5mm OrthoscopicO122
31.7mm fitting

Price:   £52.00

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18mm OrthoscopicO18
31.7mm fitting

Price:   £52.00

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25mm OrthoscopicO25
31.7mm fitting

Price:   £54.00

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