Product images of Day or night telescope- draw tube inscription
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Day or night telescope- draw tube inscription
This achromatic telescope has a leather-covered barrel and a single brass draw tube. The other brass fittings include an objective cap with a sliding cover and a sliding eyepiece cover. The maker's name is inscribed on the draw tube as 'T. Harris & Son, / London / Day or Night'. Night and day telescopes were commonly used on board ship. As the name suggests, they could be used in the dark because they had relatively large objective lenses to collect the maximum amount of light in poor seeing conditions.
Thomas Harris & Son
- Image reference: F4525-002
- National Maritime Museum, Greenwich, London