• Best suited for APS-C sized sensors
• 180° diagonal angle of view
• Multi-coated glass reduces flare and aberrations
SpecificationsFilter Size: n/a
f/Stop Range: 3.5-22
Minimum Focus Distance: Not specified by manufacturer
Magnification: Not specified by manufacturer
Angle of View: 180°
Diagonal Groups/Elements: 7/10
Length: 4" (10cm)
Maximum Diameter: Not specified by manufacturer
Weight: 0.9 lbs (443g)
Item Includes• Lens Pouch
• 1-Year Warranty
ReviewsGreat for Panoramas, November 24, 2009
By Jeffrey Martin
This review is from: Vivtar 7mm f/3.5 Series 1 Manual Focus Fisheye Lens for Canon EOS Digital SLR Cameras (Electronics)
First of all, let's clarify that this lens is not made by Vivitar - it is rebranded and originally made by Samyang (as Samyang 8mm). It seems that the cosmetic design of the lens might be unique to Vivitar. You can find this lens also branded as Bower, Polar, Falcon, Rokinon, Digital Innovations. And of course, Samyang. The Vivitar version is the sexist-looking though. here is rokinon:
Rokinon 8mm f/3.5 Aspherical Fisheye Manual Focus Lens for Canon EOS 50D, 40D, 30D, 20D, 10D, Digital Rebel (300D), Rebel XT (350D), Rebel XTi (400D), Rebel XS (100D), Rebel XSi (450D) & Rebel T1i (500D) Digital SLR Cameras
You'll also notice that the other brands call this lens a different focal length - Samyang calls it 8mm for example. Just to be clear, these are all the same lens. Why the difference? Well, you probably don't even want to call the lens 7 or 8mm. If you compare it to other lenses, it will be closer to 10 or 12mm. The main issue is that this lens doesn't use the normal (equisolid) fisheye projection, but rather, a "stereographic" projection. What does this mean? It means that the "fisheye distortion" is not quite as pronounced at the sides of the image.
If you have a full-frame sensor, you can cut off the lens hood of this lens and have a "circular" fisheye similar to an 8mm lens on a 1.5 or 1.6 crop sensor. (yes this will void your warranty ;-)
Overall, the image quality of this lens is on par with lenses that cost twice as much, or more.
For some incredibly in-depth analysis of this lens, check the intrepid Michel Thoby's page:
Know the Vivitar lens you are looking for?