Vignetting (darker corners of the image) when using the Tamron 25mm lens and 5 Megapixel GigE

[Omron Forums Support]

Vignetting is seen when using the Tamron 25mm #lens (P/N: 98-92800574) with the 5 mp #gige camera - CMG50 (P/N: 98-000120-01). This is a lens issue, not a camera issue. Also tried the Tamron 50mm #lens (P/N: 98-92800576) and there is very little vignetting.