On a DSLR, will a fisheye lens effect show in the optical viewfinder and Live View?
Asked 2/25/2015
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If I mount a fisheye lens on a DSLR, will I see the fisheye distortion through the optical viewfinder, or only in the final image? Will Live View also show the fisheye effect? I'm asking because I can't try one in person.
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
11y ago
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On an SLR, since the image is transmitted by the attached lens regardless of whether you use the optical viewfinder or live view, both live view and the optical viewfinder will show what the sensor sees, including the effect of any filters or modifiers attached to the lens. Indeed, live view is a feed directly from the sensor.
Not all viewfinders offer 100% coverage of the sensor, however. The exact coverage will be listed in the camera's technical specifications, so if your camera shows less than 100% coverage you will need to check for objects intruding on the very edges of the frame that may not be visible when you frame the shot using the viewfinder. There may also be vignetting which will not be visible through the viewfinder but which is evident in live view and the final photograph.
Originally by user456. Source · Licensed CC BY-SA 4.0
user456
11y ago
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Generated from our catalog & community — verify before relying on it.
Yes. On a DSLR, both the optical viewfinder and Live View show the image formed by the lens, so a fisheye lens’s curved/distorted perspective will be visible in both.
In the optical viewfinder, light passes through the lens first and is then reflected up to the viewfinder, so you are seeing the lens’s rendering. In Live View, the image comes directly from the sensor, so the fisheye effect will also be visible there.
The main caveat is viewfinder coverage: many DSLR optical viewfinders do not show 100% of the final frame, so the extreme edges may include a little more than you saw while composing. Live View usually reflects the captured frame more accurately. Also, edge darkening or vignetting may be more obvious in Live View and in the final photo than through the optical finder.
You do not need a special “fisheye viewfinder.”
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