Venus Optics Laowa 15mm f/4 Macro Lens

To be honest it is a bit weird shooting macro on such a wide lens. You can get really up close to the object, within millimetres of the subject. 

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The infinity focus allows you to use it as a wide 15mm lens with up to 6mm shift. But there is significant vignetting.  

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Upon further reading up on the tech specs it is only recommended to be used in APSC mode when using the shift functions.