Ricoh has introduced a specialized wide-angle lens for the Ricoh GR III, expanding the standard 28mm lens to a broader 21mm. So if love the GR III but wish it had a wider lens, this might just be the fix you’re after. I’ve been testing it out on the GR III. Here’s how it works and what the real-world results look like in practical terms. I’ve found that it does an excellent job optically, but it comes with one important negative.