First off the Peleng 8mm is a circular fisheye for film bodies. With a Nikon DSLR you'll find you won't get a full frame image as the sensor is just a fraction too wide and narrow. (see image 2 below). The Peleng maps light intensity a bit better than the Sigma I used to make the shot below this afternoon. Colour rendition with the Peleng is very similar to the Aresat used in shot 3.
Images (top to bottom) Nikkor 10.5mm FE, Sigma 8mm FE, Aresat 16mm FE.
There were no colour or other adjustments to the images, natural colour contrast is preserved from each lens. Shooting conditions were pretty horrific this afternoon when I took the shots, wind was around 30-35km/h with fast moving cloud. Images were taken using manual exposure and no compensation from a fixed location.
In reality, only the Nikkor 10.5 is useable out of the box as a fisheye lens. Though it's a far higher cost than the Peleng, Sigma or Aresat units it's colour rendition is more accurate as is it's light intensity mapping.
Cheers,
Ian
Note: the above image is smaller than the original, for more detail save the image and view with a good image viewer. The image will be deleted in a couple of weeks time