Used Pentax 12-24mm F4 DA ED AL (IF) Lens
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Condition & contents
| Grading | Excellent condition, lights signs of use, no marks to glass. |
|---|---|
| Testing | Fully tested |
| Warranty | 12 month warranty |
| Includes | Boxed complete. |
At a glance: Pentax smc DA 12-24mm f/4 ED AL (IF) - constant-aperture ultra-wide zoom for K-mount APS-C, 18-36mm equivalent.
About this lens
The smc PENTAX-DA 12-24mm f/4 ED AL (IF) is Pentax's professional-grade ultra-wide zoom for APS-C, covering an 18-36mm equivalent range at a constant f/4. It was one of the strongest ultra-wide zooms available for any crop-sensor system, noted for low distortion and consistent corner performance - the lens Pentax landscape photographers reached for.
Build & handling
| Focal range | 12-24mm (18-36mm equivalent on APS-C) |
|---|---|
| Optical construction | 13 elements in 11 groups, including 2 ED and 3 aspherical |
| Focus | Inner focus (IF) - front element does not rotate |
| Minimum focus distance | 0.30m |
| Coverage | APS-C only (DA) |
| Filter thread | 77mm |
| Weight | Approx. 430g |
Works with
- Pentax K-mount APS-C bodies
- Stabilised by in-body Shake Reduction on Pentax bodies
- Not designed for full-frame - the DA designation covers the APS-C image circle only
- 77mm screw-in filters
Best for
The natural choice for landscape, architecture and interior work on a Pentax APS-C body. The constant f/4 aperture keeps exposure stable through the zoom range, and the inner-focus design means filters and polarisers stay put as you focus. At 18mm equivalent it is genuinely wide - wide enough for cramped interiors and dramatic foreground-led landscapes.
Frequently asked questions
Can I use it on a full-frame Pentax K-1?
It will mount, and the K-1 will crop automatically, but the DA designation means it is designed for the APS-C image circle - you will not get full-frame coverage across the whole zoom range.
Does the front element rotate when focusing?
No. The inner-focus design keeps the front element static, so graduated filters and polarisers hold their orientation.
Specifications
| Focal Length | 12-24mm |
|---|---|
| Lens Type | Wide-Angle, Zoom |
| Max Aperture | f/4.0 |
| Lens Mount | Pentax K Mount |
| Condition | Used |
| Brand | Pentax |