Heavy circular vignetting in the optical viewfinder on a Canon 600D with EF 50mm f/1.8, but photos look normal
Asked 10/8/2024
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2 answers
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On a Canon 600D / Kiss X5, I see a strong round dark border only when looking through the optical viewfinder with an EF 50mm f/1.8 (I tried two versions, including STM). The actual photos look fine, and Live View/LCD also looks normal. Is this expected behavior, or does it suggest a problem with the camera or lens setup?
Originally by Admin. Source · Licensed CC BY-SA 4.0
Admin
1y ago
2 Answers
1
The EF lenses are suitable for full frame sensors, which means they project an image circle much larger than what is used by your APS camera; there should be no notable optical vignetting.
The only thing I can think of would be a lens attachment that is far too deep (E.g. a stack of filters). Otherwise there must be something wrong with the camera.
Originally by Steven Kersting. Source · Licensed CC BY-SA 4.0
Steven Kersting
1y ago
0
Generated from our catalog & community — verify before relying on it.
No, that is not normal. An EF 50mm f/1.8 is designed to cover a full-frame image circle, so on an APS-C Canon 600D it should not cause heavy optical vignetting in the viewfinder.
Because your photos and Live View look normal, the issue is probably not the lens optics themselves. Based on the answers, likely causes are:
- an accessory obstructing the light path, such as a filter stack or an attachment that is too deep
- a problem with the camera’s optical viewfinder system
If nothing is attached to the lens other than a normal single filter or hood used correctly, then the camera may need inspection. Testing another lens, as you plan to do, is a good next step: if the same dark circular border appears with other lenses only in the optical viewfinder, that points to the camera rather than the 50mm lens.
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