Newtonian primary mirror
Image information
Sizing information
| Overall size (inc frame) | x cm ( x in) |
| Depth | cm (in) |
| Artwork | x cm ( x in) |
| Border (mount) |
cm
top/bottom
(in)
cm left/right (in) |
| The paper size of our wall art shipped from the US is sized to the nearest inch. | |
Newtonian primary mirror
A Newtonian primary mirror of speculum metal with a focal length of 313.06cm. The mirror is very smooth and regular but for a prominent zone of short focus whose radius was about 2/5 that of the whole mirror. There is also a small spot of short focus at the centre. The whole mirror appeared under the knife-edge to be of nearly spherical figure, or perhaps very slightly parabolic.
Sir William Herschel
- Image reference: F3364
- National Maritime Museum, Greenwich, London, Herschel Collection
Discover more
More by this artist
Search for similar images
Product images of Newtonian primary mirror
Our framed prints
Every framed picture is created by hand in our workshop by specialist framers.
Black, white, brown, silver, gold or natural frames available, supplied ready to hang.
All our frames have a smooth satin finish, and measure 20mm (front face) by 23mm (depth from wall).
Read more about our framed art prints.
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.
Delivery & returns
We print everything to order so delivery times may vary but all framed pictures are despatched within 5-7 days via courier or recorded mail.
Due to the coronovirus pandemic and Brexit situation, current shipping times may be longer, particularly for destinations outside the UK.
Delivery to the UK is £10 for a single framed print.
We will happily replace your order if everything isn’t 100% perfect.
