Sigma 4.5mm f/2.8 EX DC HSM Lens for Canon Digital SLR
The Sigma 4.5mm f/2.8 EX DC HSM Lens is a spherical fisheye lens that easily captures a full 180° view in all directions, in a circular image. Even the most familiar and mundane of subjects can be portrayed with startlingly fresh new expressions through exaggerated perspectives and unusual distortion effects. It is well suited for academic and technical measurements such as solid angle measurements, cloud cover measurements & virtual reality.
Having the HSM (Hyper Sonic Motor) incorporated into this lens allows for focusing to be quieter and more responsive. This lens provides the equivalent focal range of approx. 7.2mm when used with a Canon digital SLR camera (*).
DC lenses are exclusively designed for digital SLR cameras. The image circle (rear of lens) is made to match the smaller dimensions used for the image sensor on digital cameras. As a result these lenses are also more compact and lightweight, and are better matched to digital SLR cameras.
Note! (*) Not suitable for 35mm film SLR cameras or for any digital SLR camera with image sensor bigger than APS-C size, e.g. 5D, 1Ds, 1Ds Mark II or Kodak Pro SLR/c.
- The EX lens series denotes excellence of engineering and new technology.
- Super Multi Layer (SML) coating reduces ghost and flare.
- Special Low Dispersion (SLD) glass provides effective compensation of chromatic aberration.
- The HSM (Hyper Sonic Motor) ensures fast and quiet autofocusing and allows full-time manual focus override by rotation of the focus ring.
Go To
| Performance | |
|---|---|
| Focal Length | 4.5 mm |
| Aperture |
Maximum: f/2.8 Minimum: f/22 |
| Camera Mount Type | Canon EF-S |
| Format Compatibility | Canon (APS-C) |
| Angle of View | 180° |
| Minimum Focus Distance | 5.3" (13.46 cm) |
| Magnification | 0.16x |
| Maximum Reproduction Ratio | 1:6 |
| Groups/Elements | 9/13 |
| Diaphragm Blades | 6 |
| Features | |
|---|---|
| Image Stabilization | No |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | None |
| Dimensions (DxL) | Approx. 3.0 x 3.1" (7.62 x 7.87 cm) |
| Weight | 1.03 lb (470 g) |
REVIEW SNAPSHOT®
by PowerReviews(based on 4 reviews)
Ratings Distribution
100%
of respondents would recommend this to a friend.
Pros
- Easily mounted (3)
- Strong construction (3)
Cons
Best Uses
- Reviewer Profile:
- Photo enthusiast (3)
REVIEWS
Reviewed by 4 customers
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Displaying reviews 1-4
Pros
- Easily Mounted
- Firm Mount
- Full round fisheye
- Strong Construction
- Very wide field
Cons
- Autofocus problems
- Not tack sharp
Best Uses
- Artwork
- QTVR
- Special effects
Comments about Sigma 4.5mm f/2.8 EX DC HSM Lens for Canon Digital SLR:
I wanted a full round fisheye for my Canon 7D, and this is the only one I could find. It seems well made and I'm content with it, though there were issues. Specifically, the 7D was unable to get correct autofocus. After an autofocus, if I turn on Live View and zoom in, the focus can be seen to be blurry. A Live View autofocus will correct it. I wrote to Canon and they said it was probably the lens since it wasn't made by them and I had no trouble with other Canon lenses. I wrote to Sigma and they said it might be an adjustment problem and I could send them the lens for calibration. [...]The second lens has the exact same behavior.Canon says the Sigma lens must not use their autofocus signals correctly, and the lens was probably designed before the 7D was sold. But my Canon 40D body has the same problem. It seems likely the camera's focus sensors have trouble with the extreme wide angle of a full round fisheye. Live View uses contrast comparison on the image sensor instead of the usual focus sensors. Since this works fine, I'm content to use the lens this way. My application is round landscapes and QTVR panoramas; working in Live View for this lens is okay. It's pretty amazing how the stitching software can take three round fisheyes and produce an undistorted 360 degree panorama. The extreme field of view captures the zenith and the nadir. If you just wanted a very wide angle, you'd probably get better results with a rectangular fisheye that used the whole frame (like the Sigma 8mm). But if you want a full round, this is the only way I found to get it on an APS-C sensor. When the images are blown up they're not tack sharp, which you might expect in a lens at this cost. But this is a special type of image and, as I said, I'm content.[...]
- Was this a gift?:
- No
Pros
- Clear Optics
- Consistent Effect
Cons
Best Uses
Comments about Sigma 4.5mm f/2.8 EX DC HSM Lens for Canon Digital SLR:
I have been shooting sport photos for a while now and was looking for something new to spice up the images. I wasn't sure how I could use the fisheye but now I have had a chance to use it... wow. I can get some excellent images from a perspective I have never used before. It has taken me a bit of practice and it has been worth every second. I love this lens.
- Was this a gift?:
- No
Pros
- Easily Mounted
- Strong Construction
Cons
Best Uses
Comments about Sigma 4.5mm f/2.8 EX DC HSM Lens for Canon Digital SLR:
Great lens for outdoor and even interior/architecture. This is a really fun lens especially on portrait.
Pros
- Clear Optics
- Consistent Effect
- Easily Mounted
- Firm Mount
- Strong Construction
Cons
Best Uses
- Artwork
- Color Correction
- Image Manipulation
- Lens Protection
- UV Protection
Comments about Sigma 4.5mm f/2.8 EX DC HSM Lens for Canon Digital SLR:
for special architectural effects when capturing a large building. Try composing the frame with an image in the foreground and use the sloping background to enhance the theme. For instance, using a fisheye lens when shooting a tulip field in Holland adds interest when foreground flowers feature prominently and a quaint windmill farm frames the background.
Displaying reviews 1-4
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- Price: $39.95
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- Original: $11.99
- Save: $1.20
- Price: $10.79
Protective Wraps & Mats
- Price: $11.95
What's in the Box
- Front & Rear Lens Caps
- Lens Hood
- Lens Case
- 1-Year Worldwide Warranty + 3-Year Extended USA Warranty
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