Lately I am shooting landscapes with Fisheye Lenses for a very wide angle of view with 1 image or sometimes multiple image panoramas. Fish-eye lenses give you a very wide Field of View but you have the Fish-eye Effect look or Warped looking images. But when working on the files it is easy to correct and remove the Fish-eye look. This is also useful if shooting multi-image panoramas with Fish-Eye lenses for an even wider view because the Fisheye effect makes it almost impossible to blend the images nicely. If shooting Multi-image Panoramas with Fisheye lenses before blending the images you have to remove the “Fish-eye” distortion. So I use Photoshop’s Adaptive Wide Angle filter under Filters and enter the info needed there to de-fish the images. Sometimes it takes a few tries especially with Fisheye lenses like this 11mm Fisheye lens. You can also use the Warp tool to fine tune the image distortion a little more after using the Adaptive Wide Angle filter. The Artisan TT 11mm lens does not communicate with the R camera body so you have to set the camera to shoot without a lens and manually set the f/stop you want to use on the lens. If you use f/11 or f/16 almost everything is in focus without manually focusing if you set the lens to infinity & the Camera on Aperture Priority.
I like photographing multi-image panoramas and assembling them in Photoshop. Lately I have been doing a lot of panoramas with a 7.5mm Fisheye lens on an Olympus OM-D1 which has an image of 190 degrees field of view. But before I assemble the Panoramas I have to De-Fish the Fisheye Images in PhotoShop. To De-Fish the images I use the Adaptive Wide Angle Filter in Photoshop. Loading all the images in layers in one Photoshop file and using the Adaptive Wide Angle Filter for each layer to de-fish them before the final blending. Below is an example of de-fishing the image taken with a 7.5mm Fisheye lens on a m43 Olympus Camera. The Adaptive Wide Angle Filter I believe is set up for Full Frame Cameras so you might have to experiment on the Scale setting. It also helps when using the fisheye lens to have the horizon line somewhat in the center in the image. You have less Fisheye curvature this way to correct.
Once you have the De-Fished the images go to Edit, then Auto-Align Layers. Next use Auto-Blend layers for the final image. If shooting hand-held and you have some white areas around the edges you can select those areas and use “content – aware fill” to let Photoshop fill in those areas or crop in to eliminate them. The Featured Image is 5 landscape images panorama aligned & blended in Photoshop.