Our eyes are about 65mm apart, so they send slightly different images to our brains, which interpret the images and we see in 3 dimensions every day. In order to reproduce the 3d effect with photography, we need to obtain 2 images taken with a similar separation to that of our eyes; see My Cameras.
Viewing 3D Images
The images on this web site are side-by-side 3D images, which can be viewed by a number of means, mainly depending on the width of the image.
Free-viewing 3D images is the simplest way for images up to 120mm wide; try to defocus your eyes, like when viewing Magic Eye images. If you see 3 images, concentrate on the center image and it will jump into 3D.
For images up to 175mm wide, I use the Loreo Lite viewer obtainable from https://www.widescreen-centre.co.uk/loreo-lite-fold-flat-3d-viewer-one.html, or the Lite Owl viewer designed by Brian May; https://shop.londonstereo.com/LITE.html.
For larger images I use prismatic spectacles, obtained from http://nvp3d.com/en/prism-glasses.
Some images are red/cyan anaglyphs, which may be familiar to most people from cinemas in the 1960s. Unfortunately, no anaglyph system yet made can reproduce colour properly; for example, pink orchids come out a pretty blue colour when viewed by red/cyan glasses. However, since anaglyph glasses are fairly common, I have included some images to be viewed by this technique.
Universal 3D Viewer
There is a very interesting piece of software that has become available recently; the Universal 3D Viewer. It enables you to see a side-by-side image as an anaglyph or to see an anaglyph as a side-by-side image. It’s an add-on for search engines such as Chrome or Microsoft Edge. Look for Universal 3D Viewer in Edge Add-ons or Google Web Store and install the plugin. When you open a 3D image the add-on will show a 3D icon at the top left of the 3D image. When you click on the icon you will have a choice of viewing method from a drop-down menu; select your choice and see the image as you like it. The software does not change the original image, it only changes the way you see it. You will still need 3D glasses or a viewer, but it may be more convenient to see 3D as you like it.
Nature and Travel Photography in 3D 