Canon - EF8-15mm F4L Fisheye USM Ultra-Wide Zoom Lens for EOS DSLR Cameras - Black

I had been trying to find the EF 8-15mm f/4L Fisheye lens for several months (apparently sold out everywhere. Eventually, I stumbled upon this one available through Canon's refurbished site. As far as I can tell, mine is in fine condition. I have been using it for about 5 weeks now and am beginning to understand a bit more about how to best use it. I use it on my R5 with the EF adapter and at 8mm it provides a full circle image. I have learned that you need to watch out that you don't include your own feet or shadow in the frame. I have noticed a blue fringe around the extreme edge of the photo and have also noticed some flare (even extending outside the circle) when the sun is at the outside edge of the lens. When working with the circular image in post processing, I crop to 1x1 with post-crop vignetting (changing the outer black area to white and shrinking the circle just enough to cover the blue fringe). Also in post processing, make sure you don't enable lens profile correction as that may straighten the image and ruin the circle.

This lens offers a unique perspective and is priced fairly well for an L lens. Auto focus struggles a bit when using it on my R5 with EF to RF adapter.

I already had a fisheye lens that did not go down to 8mm. So, I looked at this lens and decided to get it. I am very pleased with it's performance and the circular image at 8mm is a fantastic extra that I didn't anticipate. As always, the quality is impeccable.

great lens, just got it today and haven't put it down for a second. I am still wondering how to shoot in the circular fisheye mode that is shown in the second sample image section, would really like to know--why i bought the lens!!

Pros: Strong Construction, Creative, Fast / accurate auto-focus, Durable Cons: Other thoughts: Great image quality, good for architecture and city photography.