Tuesday, August 10, 2010
Lens Tech: Specialty Lenses For DSLR-Shooting Pros
For every job, there’s a perfect tool. Most photography can be handled by your core set of glass, but every once in a while, you need something different. These lenses don’t come out of your bag every day, but when you need one, nothing else will do.
PC-E Micro Nikkor 45mm ƒ/2.8D ED
Fisheye lenses take in a very wide angle of view—180° with current models (Nikon long ago offered a fisheye with a 220° angle of view). There are two basic types of fisheye: circular and full-frame.
Circular fisheyes produce a round image in the middle of the rectangular image frame, with a 180° angle of view in all directions. Full-frame fisheyes fill the frame and provide a 180° angle of view measured diagonally.
Olympus Zuiko Digital 8mm ƒ/3.5 Fisheye
Keep in mind that using a fisheye lens that was designed for a full-frame camera on an APS-C DSLR will result in a cropped image with a reduced angle of view. Straight lines that don’t go right through the center of the image will still be curved, but the image will be cropped by the smaller sensor, so the angle of view will no longer be a full 180°. If you use an APS-C-format DSLR and want a full fisheye effect, get a lens that was designed for APS-C (the Sigma 4.5mm ƒ/2.8 EX DC HSM and 10mm ƒ/2.8 EX DC HSM for Canon, Nikon, Pentax, Sigma and Sony APS-C DSLRs, the Nikon 10.5mm ƒ/2.8G DX Fisheye-Nikkor for Nikon, the smc Pentax DA 10-17mm ƒ/3.5-4.5 Fish-Eye Zoom for Pentax, or the Tokina AT-X 10-17mm ƒ/3.5-4.5 DX Fish-Eye Zoom for Canon and Nikon). Adorama offers the manual-focus Pro-Optic 8mm ƒ/3.5 Fish-Eye for Canon EOS, Nikon and Sony DSLRs. And Four Thirds System users needn’t feel left out: Olympus offers the full-frame Zuiko Digital 8mm ƒ/3.5 Fisheye for Four Thirds System DSLRs.
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