This is NOT a Sony E mount Lens. It says that it fits in a Sony - that's it. But I now discover there are two Sony lens mount types. This one only fits the Alpha mount. So if you want it for your Sony A7, A7R, A7S or other NEX / E mount cameras, it won't fit. Thanks to the seller for NOT making that clear.

Firstly to provide some context to this review, I reviewed this lens alongside the Samyang 24mm lens using a Canon 5D which has a full-frame sensor (and therefore no CCD cropping).As a child when I first got to play with cameras, I had a 50mm and 35mm lens. Having then moved to zoom lenses I didn't think I would go back but there's three big advantages of prime lenses:1. You can get seriously shallow depth of field (that lovely effect of the background being blurred, which is caled bokeh)2. They are fast glass (because the aperture can really be opened up, it means you can get the exposure/aperture combination to take the photo without being underexposed (especially at dusk) for risk of having too long an exposure which may blur or show movement)3. It makes you think (you have to move to the right location to get the image you want rather than cropping what you have once you're home.)At the more professional end of the market the bigger the aperture (lower f number) the more expensive the lens. In essence, this lens is competing with the Canon EF 35 f/1.4 but at a price closer to the Canon EF 35 f/2. Or is it...The key thing to be aware of is that this lens is completely manual and does not integrate to Canon's EXIF tags (the information stored on digital photos to help you remember what you did in terms of settings). Focus is manual (although the ring is nice and secure and the aperture setting to highlight depth of field is well shown). Aperture is also manual, and given the aperture and lens name (which would tell you the focal length) is not recorded with the photos you have to write down what you have taken if you want to try and learn how to improve on your photos.The lens is plastic but it feels quite well made and the mount is metal. The lens is very heavy, a good 20% heavier than the Canon f1.4 equivalent and about double the weight of the Canon f2.In terms of the tests, I was focused on low light photography and also portraits trying to get the background nicely blurred. In terms of the portrai

Firstly to provide some context to this review, I reviewed this lens alongside the Samyang 24mm lens using a Canon 5D which has a full-frame sensor (and therefore no CCD cropping).As a child when I first got to play with cameras, I had a 50mm and 35mm lens. Having then moved to zoom lenses I didn't think I would go back but there's three big advantages of prime lenses:1. You can get seriously shallow depth of field (that lovely effect of the background being blurred, which is caled bokeh)2. They are fast glass (because the aperture can really be opened up, it means you can get the exposure/aperture combination to take the photo without being underexposed (especially at dusk) for risk of having too long an exposure which may blur or show movement)3. It makes you think (you have to move to the right location to get the image you want rather than cropping what you have once you're home.)At the more professional end of the market the bigger the aperture (lower f number) the more expensive the lens. In essence, this lens is competing with the Canon EF 35 f/1.4 but at a price closer to the Canon EF 35 f/2. Or is it...The key thing to be aware of is that this lens is completely manual and does not integrate to Canon's EXIF tags (the information stored on digital photos to help you remember what you did in terms of settings). Focus is manual (although the ring is nice and secure and the aperture setting to highlight depth of field is well shown). Aperture is also manual, and given the aperture and lens name (which would tell you the focal length) is not recorded with the photos you have to write down what you have taken if you want to try and learn how to improve on your photos.The lens is plastic but it feels quite well made and the mount is metal. The lens is very heavy, a good 20% heavier than the Canon f1.4 equivalent and about double the weight of the Canon f2.In terms of the tests, I was focused on low light photography and also portraits trying to get the background nicely blurred. In terms of the portrai