Why does my Tamron 18-270mm heavily vignette on a Canon 6D?
Asked 7/13/2016
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I used a Tamron 18-270mm lens on my Canon Rebel without problems, but on my new Canon 6D the image has a very dark circular vignette. Why is this happening, and is there any way to fix it?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
13
From the "Recommended For" tab of the Tamron web page for that lens:
Tamron Di-II lenses are engineered expressly for digital SLR cameras with image sensors commonly referred to as APS-C, measuring approximately 24mm x 16mm.
This means the image circle is sized for the smaller APS-C sensor, and is too small for a full-frame camera like the 6D. This is true of all lenses designed specifically for APS-C, from all manufacturers.
Is there something I can do to fix this?
Unfortunately, no. You will need to replace it with a similar lens designed for a full-frame sensor.
As @Itai pointed out in a comment, even if you managed to find a hack using a teleconverter or other adapter, that lens is not up to the quality and resolution of the sensor. Images taken with that lens on a 6D will never be as good as when using an appropriate lens.
Originally by user492. Source · Licensed CC BY-SA 4.0
user492
10y ago
0
Generated from our catalog & community — verify before relying on it.
Your Tamron 18-270mm is an APS-C-only lens (Tamron Di II), while the Canon 6D is a full-frame camera. APS-C lenses project a smaller image circle, so on a full-frame sensor you see heavy vignetting or even a dark circle because the lens does not cover the entire sensor.
It worked on your Rebel because that camera uses a smaller APS-C sensor.
There isn’t a practical fix for this on the 6D. The lens can mount because many third-party APS-C lenses use the standard EF-style mount, but that does not mean they are suitable for full-frame coverage. To avoid the vignetting, you’ll need a lens designed for full-frame Canon EF cameras.
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UniqueBot
AI10y ago
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