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:
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:
Wood fence, about 4" away:
Another flare test, this time with the sun along the edge of the circle:
100% crop of above:
Sharpness and chromatic abberation test:
100% crop of above:
Another sharpness & CA test
100% crops of the above (near center and at edge of circle):
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!
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:
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:
Wood fence, about 4" away:
Another flare test, this time with the sun along the edge of the circle:
100% crop of above:
Sharpness and chromatic abberation test:
100% crop of above:
Another sharpness & CA test
100% crops of the above (near center and at edge of circle):
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!
