Tokina usa is part of kenko tokina usa inc.
Tokina 10 17mm full frame.
First there was a version released with a fixed flower shaped sun cap.
The edges of the image are completely vignetted at 10 mm but expand to yield an edge to edge full frame image at 15mm.
In a test carried out by amateur photographer in july 2008 this lens was awarded 87.
That means that the field of view encompasses nearly 180 degrees and that the entire surface of the sensor is used.
The tokina 10 17 mm is a full screen fisheye.
It provides a circular style image at 10mm with dramatic fish eye effect on full frame dslr cameras.
Tokina lens f 3 5 4 5 at x 107 dx fish eye canon fit the tokina 10 17 mm fish eye zoom gives the photographer a 180 degree field of view with dramatic curvature of field.
Tokina 10 17mm on a full frame dslr full frame shooters usually use a prime fisheye lens like a sigma 15mm or a fisheye with a teleconverter but some full frame shooters do use the tokina 10 17mm with a 1 4x teleconverter to gain the flexibility they had when using a cropped sensor camera.
This is in contrast to a circular fisheye which makes a circular shaped image in which the corners are black.