Pentax HD DA 20-40mm f/2.8-4 ED Limited DC WR
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Zoom lensA zoom lens by Pentax for APS-C cameras, 20-40mm f/2.8-4. The only zoom in Pentax's Limited range, in a small metal barrel.
| Maker | Pentax |
|---|---|
| Focal length | 20-40mm (zoom) |
| Maximum aperture | f/2.8-4 (it gets darker as you zoom in) |
| Made for | APS-C sensors |
| Mounts | Pentax K |
| Stabilised | no |
| Autofocus | yes |
What it frames like
- On APS-C (Pentax K): like 30-60mm on full frame; f/2.8-4 gives about the depth of field of f/4.2-6 there.
- On the larger-sensor bodies of Pentax K: it works with the camera in a APS-C crop mode, at fewer megapixels.
