It's amazing what people will overlook.

Here is his first paragraph, quoted directly :

Quote Originally Posted by Bob St. Cyr
Even before I added pinhole imaging to my fine-art photographic practice, I saw the value in having a handheld light metre. My first light metre was the Sekonic L-408, which is a great metre with a fixed 5 spot as well as the incident dome. Some of the things I like about this metre ...
That is not how you spell "meter" when referring to a measuring device.

A "metre" as the rest of us Europeans know, is a measure of length

In his next paragraph he reverts to conventional spelling of "meter", however, but then goes on to use "meter" and "metre" indifferently throughout the rest of the article.