Canon-Mount Super Zoom Lens Flare Comparison
This flare comparison is part of the Canon EF-S 18-200mm f/3.5-5.6 IS Lens Review, but it is also useful for the following reviews:
Sigma 18-200mm f/3.5-6.3 DC OS Lens Review
Sigma 18-250mm f/3.5-6.3 DC OS HSM Lens Review
Tamron 18-200mm f/3.5-6.3 XR Di II Lens Review
Tamron 18-270mm f/3.5-6.3 Di II VC Lens Review
The following samples were shot with a Canon EOS 50D using the Standard Picture Style and AV mode with -2/3 EV dialed in. The sun is the ultimate flare source, but I haven't figured out how to stop it from moving yet. So, the camera was repositioned for each lens/focal length combination tested - to catch the sun in the top left corner of the frame.
Lens hoods were installed for all shots. The tiny bright spots in the sky seen in some longer focal length pictures are insects.
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18mm

50mm

100mm

200mm

250/270mm

To my eyes, the Canon EF-S 18-200mm f/3.5-5.6 IS Lens is the clear winner in this comparison. It is the most resistant to flare.
Taking second and third position are the Tamron 18-200mm f/3.5-6.3 XR Di II Lens and Tamron 18-270mm f/3.5-6.3 Di II VC Lens. Both show a reasonable resistance to flaring.
The Sigma 18-200mm f/3.5-6.3 DC OS Lens and Sigma 18-250mm f/3.5-6.3 DC OS HSM Lens trail this pack in regards to flare. Particularly interesting is the 18-250's 200mm f/11 flare dot in the lower right area of the frame.
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