 | |
| 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)[1] |
| Max. magnification | 0.07[1] |
| 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)[1] |
| Diameter | 65 mm (2.6 in)[1] |
| Weight | 255 g (9.0 oz)[1] |
| Filter diameter | N/A |
| Accessories | |
| Lens hood | built-in |
| Angle of view | |
| Diagonal | 180°–90°[1] |
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.[2]
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.[3] Keppler wrote in an informal review "You don't use this lens to make your best girl- or 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."[4]
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
- ^ a b c d e f "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 [Journal of the Japan Photographic Society]: 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 [blog]. 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.
This page was last edited on 17 April 2023, at 03:48