With some cameras, usually fixed-lens or DSLR models, you have the option of adding conversion lenses to give your camera's lens additional wide-angle or telephoto capabilities.
The conversion lens attaches over the top of the existing lens. Although that setup is simple enough, because of this configuration, certain aspects and features of the camera may not work as you'd expect, causing problems with your images.
Click the link and use these tips for troubleshooting wide-angle conversion lenses.
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