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First go-about with the Siggy 8mm
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<blockquote data-quote="480sparky" data-source="post: 236237" data-attributes="member: 15805"><p>Finally got out this morning to take my new (to me) Sigma 8mm circular fisheye for a test drive.</p><p></p><p>I haven't had a chance to do my standard bench-test to find to 'sweet spot', so I tried to keep the aperture at f/8 or f/11.</p><p></p><p>As I'm visiting family in Texas for the holiday, I took a stroll around the back yard once the sun got a ways up in the sky. I started off with the traditional full-sky shot:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0199Post.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>As with many lenses, this one is subject to flare, especially when the light source is withing the frame. Here's the 100% crop of the above image:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0199Post2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>Wood fence, about 4" away:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0206Post.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p>Another flare test, this time with the sun along the edge of the circle:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0213Post.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>100% crop of above:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0213Post2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>Sharpness and chromatic abberation test:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0222Post.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>100% crop of above:</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0222Post2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p>Another sharpness & CA test</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0224Post.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>100% crops of the above (near center and at edge of circle):</p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0224Post2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p><img src="http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0224Post3.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p></p><p></p><p>I haven't had a chance to really do my standard bench-testing, but this first outing shows that this lens is certainly quite sharp across the image, with no real CA issues. All-in-all, it seems a very sharp lens!</p></blockquote><p></p>
[QUOTE="480sparky, post: 236237, member: 15805"] Finally got out this morning to take my new (to me) Sigma 8mm circular fisheye for a test drive. I haven't had a chance to do my standard bench-test to find to 'sweet spot', so I tried to keep the aperture at f/8 or f/11. As I'm visiting family in Texas for the holiday, I took a stroll around the back yard once the sun got a ways up in the sky. I started off with the traditional full-sky shot: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0199Post.jpg[/IMG] As with many lenses, this one is subject to flare, especially when the light source is withing the frame. Here's the 100% crop of the above image: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0199Post2.jpg[/IMG] Wood fence, about 4" away: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0206Post.jpg[/IMG] Another flare test, this time with the sun along the edge of the circle: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0213Post.jpg[/IMG] 100% crop of above: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0213Post2.jpg[/IMG] Sharpness and chromatic abberation test: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0222Post.jpg[/IMG] 100% crop of above: [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0222Post2.jpg[/IMG] Another sharpness & CA test [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0224Post.jpg[/IMG] 100% crops of the above (near center and at edge of circle): [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0224Post2.jpg[/IMG] [IMG]http://i214.photobucket.com/albums/cc172/480sparky/Photography%202/Sigma%208mm%20Circ%20Fisheye/D61_0224Post3.jpg[/IMG] I haven't had a chance to really do my standard bench-testing, but this first outing shows that this lens is certainly quite sharp across the image, with no real CA issues. All-in-all, it seems a very sharp lens! [/QUOTE]
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First go-about with the Siggy 8mm
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