Reviews and Problems with Sigma 4.5mm F2.8 EX DC CIRCULAR FISHEYE HSM
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it catches all the details
Freddie, B&H Photo
9 November 2014
Excerpt: So I work a lot and photography is my tool for reminding I'm a much more interesting person outside of my work. I was a paid photographer at one point, maybe I might do it professionally in future. So I was interested in this lens since I could finally get this effect on my smaller sensor camera. For instance I photographed this very old tree's roots in the foreground, the mid-ground was full of orange leaves, and the background capture the whole entire tree top.
Pros: Consistent Output, Durable, Fast / accurate auto-focus, Rugged, Strong Construction
Excerpt: This is the most extreme fish eye lens you can get for a APS-C camera. With a full 180º view, you get a full circular image, like the Sigma 8mm FE on a full frame câmera. Good lens quality. Luminous, fast and an excellent minimal distance of focus.
Pros: Clear Optics, Easy To Use, Firm Mount, Strong Construction
Summary: A nice, ultra wide angle lens. The HSM focus drive is fast and quiet. One great added feature is the adapter for the lens cap. It has 72mm threads, so unlike most ultra wide angle lenses this lens can be fitted with a protective filter, which is very important for valuable lens optics. Granted the added filter causes some vignetting, but with the circular fisheye nature of this lens the small added amount of vignetting is not really an issue.
Summary: Perhaps I got a bad lens, but this lens is far too soft for my purposes. Remember, 180 degrees of vision is squeezed into a circle within the rectangular canvas of your camera's sensor (hence circular fisheye). I intended to use this for spherical panoramas for realtime background images, but the clarity is just too low on my D5100. For that purpose, stay away from fisheyes and go wide angle so details are preserved.
Excerpt: Focusing can be done on objects that are only mm away. This leads to my biggest concern when using this lens: the danger of hitting the object that i'm focusing on, resulting in a scratched front optic.<br /><br />So far, I have had a lot of fun photographing every day items resulting in unusual results. <br />The main draw back to this lens, in my opinion, is that it is very pricey for what could be considered a "novelty" lens.
Pros: A really wide angle lens, Easy To Use
Cons: Can't use a filter, Easy to bump optics, See a barrel in photos
Excerpt: I wanted a full round fisheye for my Canon 7D, and this is the only one I could find. It seems well made and I'm content with it, though there were issues. Specifically, the 7D was unable to get correct autofocus. After an autofocus, if I turn on Live View and zoom in, the focus can be seen to be blurry. A Live View autofocus will correct it. I wrote to Canon and they said it was probably the lens since it wasn't made by them and I had no trouble with other Canon lenses.
Pros: Easily Mounted, Firm Mount, Full round fisheye, Strong Construction, Very wide field
Excerpt: I use this lens to create stunning and unique photographs. It is optically sharp and extremely well made. Use a horizontal rail attachment to place the vertical plane of the lens beyond your tripod legs. So far, I am totally satisfied with this product, it performs well on my K-10 & K-20 bodies.