Product images of Gregorian primary mirror
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Our expertise and use of high-quality materials means that our print colours are independently verified to last between 100 and 200 years.
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Manufactured in the UK
All products are printed in the UK, using the latest digital presses and a giclée printmaking process.
We only use premium branded inks, and colours are independently verified to last between 100 and 200 years.
Gregorian primary mirror
Unfinished 6-inch Newtonian primary mirror of speculum metal. When finished this mirror would probably be made to have a focal length of around 7ft. The actual diameter of this mirror is 165.1mm. One surface has been roughly smoothed, in preparation for grinding.
Sir William Herschel
- Image reference: F3362
- National Maritime Museum, Greenwich, London, Herschel Collection