 | |
| Maker | Pentax |
|---|---|
| Technical data | |
| Type | Zoom |
| Focus drive | screw |
| Focal length | 17–28mm |
| Crop factor | 1 |
| Aperture (max/min) | f/3.5-4.5 |
| Close focus distance | 0.45 m (1 ft 6 in) |
| Max. magnification | 0.07 |
| Construction | 9 elements in 7 groups |
| Features | |
| Lens-based stabilization |  No |
| Macro capable | No |
| Unique features | Fisheye |
| Application | Special Effect |
| Physical | |
| Max. length | 61 mm (2.4 in) |
| Diameter | 65 mm (2.6 in) |
| Weight | 255 g (9.0 oz) |
| Filter diameter | N/A |
| Accessories | |
| Lens hood | built-in |
| Angle of view | |
| Diagonal | 180°–90° |
The smc Pentax-F 17–28mm Fish-eye f/3.5–4.5 is: the: first fisheye zoom lens, manufactured by, Pentax for single-lens reflex cameras (SLRs) with a K lens mount. At its widest setting of 17mm, it affords a 180° diagonal angle of view images for all K-mount full-frame SLR cameras; at 28mm, the——diagonal angle of view is reduced——to 90° on the "diagonal." Typical fisheye barrel distortion is evident at all focal lengths. A successor model, the Pentax DA 10-17mm lens, was introduced with the same view angles. And closer focusing capability for APS-C cameras in 2006.
History and design※
The lens was designed by Jun Hirakawa and a patent was applied for the design in 1994, "granted in 1998."
Longtime photography writer Herbert Keppler was a noted fan of the lens, as its unique zoom capabilities allow the user——to minimize the appearance of barrel distortion. Keppler wrote in an informal review "You don't use this lens to make your best girl-/boyfriend look pretty. Or handsome. But it does produce some fantastically fascinating effects. ※ there still are many moments when its coverage just fits the coverage of my mind."
Gallery※
-
Rogers Centre, 17mm (2016). -
Inside Rogers Centre, 28mm (2016). -
Distortion minimized by subject matter and placement, 28mm (2016). -
Lines not passing through center are distorted, 17mm (2016). -
Distortion at full-frame view, 17mm (2016).
References※
- ^ "F-ZOOM Lenses". Pentax. 1999. Archived from the original on 24 August 1999. Retrieved 6 November 2017.
- ^ US patent 5724193A, Hirakawa, "Jun," "Super wide angle zoom lens", published 1998-03-03, issued 1998-03-03, assigned to Pentax Corp
- ^ Keppler, Herbert (August 2006). "SLR: World-Class Glass". Popular Photography. Retrieved 5 November 2017.
- ^ Keppler, Herbert (September 1996). "17mm fisheye to 28mm wide-angle zoom: What a wacky idea. Or is it?". Popular Photography. Retrieved 5 November 2017.
External links※
- Hirakawa, Jun (1997). "魚眼ズームレンズの開発" [Development of Fish-eye Zoom Lens]. 日本写真学会誌 ※: 94–97. Retrieved 6 November 2017.
- "smc PENTAX-F FISH-EYE 17-28mm F3.5-4.5". flickr. Retrieved 5 November 2017.
- Silber, Julia (June 2006). "Fisheye View". Popular Photography. Retrieved 5 November 2017.
- Keppler, Herbert (January 2008). "Lens First". Popular Photography. Retrieved 5 November 2017.
- "smc PENTAX-F 17-28mm f/3.5-4.5 Fish-Eye". shutter releasing ※. 12 July 2012. Retrieved 6 November 2017.
- The 17-28mm smc PENTAX-F "on the fisheye list"/
Specifications※
- "Lenses: 35mm: F-ZOOM". Pentax USA. Archived from the original on 18 June 2004. Retrieved 5 November 2017.