Airborne Photographic Exposure Calculator - Mark 5
Science Museum Group
This is a tool that was used on reconnaissance aircraft missions to help them to take clear photographs of the target. What makes it special to me, however, is the fact that I am the first person to see it on the web.
The Science Museum Group of the United Kingdom has an online photo archive of over 350,000 objects from the Science and Industry Museum, the National Science and Media Museum, and the National Railway Museum.
When you have over a quarter million photos on your website, there are going to be quite a few that get overlooked. With that in mind, the Science Museum Group has set up this portal that will load a photo from their archive that has zero page views. Click on this link, then click on the Object Number at the top of the page to see a photo of a museum artifact that has never been seen since it was uploaded to their archive.