This is a very nice and very well made lens for the price. I bought this lens specifically to use as an all sky lens for capturing meteor showers and other astronomical events and for the images I received. so far very good with good sharpness across the frame. I'm definitely impressed with this lens - first of all it's very nicely packaged. Once I slipped this lens on to my Panasonic GH5S and started capturing video and photos, I really didn't want to go back to my wide-angle lens (even with a manual lens) - since I get so much more of it I can just crop What I don't need is out of the picture. I can say that if you have a Micro 4/3 camera you need this lens. Images are sharp with just the right amount of distortion. Everything I was looking for in a fish eye. I am satisfied with this lens and can only recommend it. I am happy with this lens
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