Originally posted by matroxication I completely agree that the sharpness wise it cannot match to any of my primes. Also getting focus lock on the ultra wide lens is very challenging. I would probably have it at infinity at all times and keep my subjects over a meter so that everything is focused.
Not sure what F stop you are using on these photos - this does make a difference. On some of the photos - three and six, I see some unsharpness and possible decentering, maybe on the top and bottom left and bottom right of the pictures, but you really need a level plane with consistent lighting to know for sure! Other photos you include - maybe mostly stopped down - look fine all over. I think you know what to look for, based on your observations. Textured wall at medium and far distances is the way to go, if you are level and plane when you take the shot. Of course, decentering is worse when wide open and with more limited depth of field. Frankly, I never shoot less than f8 and usually at f11 or f13.5, and almost always on a tripod. (my 14mm copy had decentering even noticable at f8 on the top right side!) However, if you plan on night photography, you may need to test wide open thoroughly, since smearing of stars and corners can be a big no-no, if they are out of focus. Lastly, infinity of the Samyang may or may not be accurate. Most people, including some in this forum, say it is usually not, so you should find your own infinity and maybe two or three other accurate distances that you commonly use, and mark them on a white or light piece of tape on the lens with a sharpie, if you plan on zone focusing, and if you have limited depth of field. Cheers and good luck...
P.S. Suggest as another mentioned , to find the Samyang 14mm distortion profile in LR or PS and use that, especially if you have buildings or people in the picture. For landscapes, I usually adjust my own images manually, but that is my preference.
Last edited by mtgmansf; 09-12-2018 at 07:06 AM.
Reason: addition.