from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of diopter.
from the GNU version of the Collaborative International Dictionary of English
- n. A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters; used by oculists
Sorry, no etymologies found.
It features multi-coated optics which ensures superior light transmission, built-in range finder reticle, individual dioptre focus etc.
A dioptre adjustment wheel is immediately adjacent, enabling the short sighted to use it without clashing spectacles.
The second way to compose your images is the electronic viewfinder, which juts out from the rear of the camera and helpfully offers dioptre control for glasses wearers.
• Magnification 0. 96x with a 50mm lens and -1 dioptre
• Magnification 1. 15x with a 50mm lens and -1 dioptre
• Magnification 1. 02x with a 50mm lens and -1 dioptre
• Magnification 1. 4x (equivalent to 0. 7x on a 35mm camera / 50mm lens) • Dioptre adjustment -4 to +4 dioptre
Fortunately I found my five-dioptre soldering-glasses, without which I would have little chance of ever doing the fiddly thing.
• Magnification 0. 92x with a 50mm lens and -1 dioptre
There's no dioptre adjustment available and after a short period of use the EVF actually made my eyes hurt - I soon gave up and exclusively used the main LCD screen.