On sale 5%
Pentax 21340
The 150-450mm zoom reaches an effective 675mm on APS-C bodies, and its 21-seal weather-resistant build ensures reliable operation in harsh field conditions. Extra-low dispersion glass and HD coatings deliver sharp, high-contrast images while the Quick-Shift Focus system allows instant manual override. This lens is best for wildlife and sports photographers using Pentax DSLRs who need rugged, long-reach telephoto performance.
Focal length 150-450mm
Aperture f/27
Mount Pentax K
Weather Sealed Yes
Weight 2313 g
af type DC
lens type super-telephoto
39 Overall Score
Price $2,097
Snapshot
Pros & Cons
Pros
- Strong versatility (82nd percentile) 82nd
- Strong optical (80th percentile) 80th
Cons
- Below average aperture (8th percentile)
- Below average build (11th percentile)
- Below average bokeh (19th percentile)
- Below average user sentiment (30th percentile)
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
78/100Our AI sentiment read
Based on 8 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Super-telephoto |
| Focal Length Min | 150 |
| Focal Length Max | 450 |
| Elements | 14 |
| Groups | 11 |
| ED Elements | 4 |
| Coating | HD-Beschichtung |
Aperture
| Max Aperture | f/27 |
| Min Aperture | 4.5-5.6 |
| Constant | No |
| Diaphragm Blades | 9 |
Build
| Mount | Pentax K |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 2.3 kg / 5.1 lbs |
| Filter Thread | 86 |
AF & Stabilization
| AF Type | DC |
| Stabilization | No |
Focus
| Min Focus Distance | 2000 |
| Max Magnification | 1:4.55 |
vs Competition
| Spec | Pentax 21340 | Nikon NIKKOR Z 17-28mm f/2.8 | Tamron Di III 28-75mm f/2.8 VXD G2 | Sigma Contemporary 10-18mm f/2.8 DC DN | Panasonic Leica DG Vario-Elmarit H-ES12060 | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 150-450mm | 17-28mm | 28-75mm | 10-18mm | 12-60mm | 28-70mm |
| Max Aperture | f/27 | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/22 |
| Mount | Pentax K | Nikon Z | Sony E | Sony E | Micro Four Thirds | Canon RF |
| Stabilization | false | false | false | false | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 2313 | 450 | 540 | 260 | 320 | 495 |
| AF Type | DC | Stepping Motor | VXD | Autofocus | linear motor | STM |
| Lens Type | super-telephoto | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Pentax 21340 | 54.6 | 19.3 | 10.5 | 34 | 80.3 | 8.1 | 29.8 | 81.5 | 64.7 | 38 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87 | 88.1 | 73.6 | 86.3 | 87 | 85.8 | 90.8 | 68.1 | 64.6 | 38 |
| Tamron Di III 28-75mm f/2.8 VXD G2 Compare | 54.6 | 88.1 | 67.2 | 87.3 | 87.8 | 85.8 | 80.4 | 78.2 | 83.1 | 38 |
| Sigma Contemporary 10-18mm f/2.8 DC DN Compare | 54.6 | 83.5 | 87.3 | 93.3 | 81.6 | 85.8 | 80.4 | 69.1 | 68.8 | 38 |
| Panasonic Leica DG Vario-Elmarit H-ES12060 Compare | 98 | 88.1 | 83.1 | 50.4 | 90.2 | 85.8 | 44.2 | 93.1 | 63.5 | 83.2 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 87 | 25.9 | 70.2 | 80.4 | 85 | 22.6 | 98.1 | 77.2 | 87.9 | 98.5 |
Price
Value & Pricing
From $2,097
B&H Photo 1 offer From $2,097
Amazon 1 offer From $2,100
Price History
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
