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1 23248 1/15/2007
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1sigma8f4.jpg


Keywords: Sigma Canon Nikon Minolta Pentax Fisheye Wide Prime 35mm


Ross_Alford

Registered: October 2005
Posts: 36
Sigma 8mm f/4 EX Circular Fisheye review by Ross_Alford
Review Date: 1/15/2007 Would you recommend the product? Yes | Total Spent: None indicated| Rating: 9 

 
Pros: relatively inexpensive and quite reasonable image quality
Cons: circular image only on full-frame cameras

This lens is great, given that the alternatrives are either a very expensive (even used) camera maker's lens or a relatively poor quality converter. Image quality is very high, though there is CA.


With this lens it is possible to produce an immersive VR image with only three exposuresif you have a full-frame camera, or with a few extras if you mount an APS-C sensor camera vertically; on those cameras the top and bottom edges are cut off but you can still cover the full circle with plenty of overlap with 6 images and could probably get by with fewer.


On an APS-C sensor camera you get the full 180 degrees horizontally, but less, I think about 120, vertically, and the top and bottom of the frame are cut off. Images can still be remapped quite effectively to very wide panoramics, or to very interesting ultrawide shots.


One thing to watch out for if you are looking for one of these lenses; the older version of the manual-focus Sigma 8mm only covers 170 degrees or thereabouts, and should be avoided if you are looking for easy immersive panorama shooting. Even that lens can produce some very interesting results, though--a sample image from that lens, remapped to rectilinear using Panorama Tools (with some subsequent editing of the pictures on the wall):


http://www.pbase.com/northqueenslandphotos/image/54272888


 






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