Specifications#
Equivalent focal length on different cameras#
Field of view and depth-of-field equivalence when this lens is used on bodies with different sensor sizes (natively or via an adapter).
| Camera format | At 150 mm | At 260 mm | At 450 mm | Equiv. aperture (DoF) |
|---|---|---|---|---|
| APS-C | 225 mm · 11° | 390 mm · 6° | 675 mm · 4° | f/6.8 |
| APS-C (Canon) | 240 mm · 10° | 416 mm · 6° | 720 mm · 3° | f/7.2 |
| Micro Four Thirds | 300 mm · 8° | 520 mm · 5° | 900 mm · 3° | f/9.0 |
Depth of field & background blur#
Computed on its native APS-C format (CoC 20 µm). “Blur @2 m” is the size of an out-of-focus point at infinity, as a percentage of frame width, with the subject at 2 m — a simple bokeh index. Full table: 135 mm f/5.6 on aps-c.
| Focal | Aperture | at 1 m | at 2 m | at 5 m | at 10 m | Hyperfocal | Blur @2 m |
|---|---|---|---|---|---|---|---|
| 150 mm | f/4.5 | 0.7 cm | 2.9 cm | 19.0 cm | 77.2 cm | 256 m | 11.5% |
| 150 mm | f/8 | 1.2 cm | 5.1 cm | 33.8 cm | 1.38 m | 144 m | 6.5% |
| 260 mm | f/4.5 | 0.2 cm | 0.9 cm | 6.2 cm | 25.4 cm | 768 m | 36.7% |
| 260 mm | f/8 | 0.3 cm | 1.6 cm | 11.0 cm | 45.1 cm | 432 m | 20.7% |
| 450 mm | f/4.5 | 0.0 cm | 0.3 cm | 2.0 cm | 8.3 cm | 2.3 km | 123.5% |
| 450 mm | f/8 | 0.1 cm | 0.5 cm | 3.5 cm | 14.8 cm | 1.3 km | 69.5% |
Handheld & night-sky limits#
NPF assumes typical 20–24 MP sensors (≈6 µm pixels on full frame, ≈3.9 µm on APS-C, ≈3.3 µm on Micro Four Thirds).
| Body | Min. handheld shutter (longest focal) | 500 rule at 150 mm | NPF at 150 mm, f/4.5 |
|---|---|---|---|
| APS-C | 1/640 s | 2 s | 2 s |
| APS-C (Canon) | 1/800 s | 2 s | 2 s |
| Micro Four Thirds | 1/1000 s | 2 s | 2 s |
Compatible cameras#
Bodies in our database with a native Pentax K mount. Full-frame bodies switch to an APS-C crop with this lens.
- Ricoh Pentax KF 2022
- Ricoh Pentax K-3 Mark III 2021
- Pentax K-1 II crop mode
- Ricoh Pentax KP 2017
- Ricoh Pentax K-1 crop mode
- Ricoh Pentax K-70 2016
- Ricoh Pentax K-3 II 2015
- Pentax K-3 2013
- Pentax K-50 2013
- Pentax K-01 2012
- Pentax K-5 II 2012
- Pentax K-30 2012
- Pentax K-5 IIs 2012
- Pentax K-5 2010
- Pentax K-r 2010
- Pentax K-x 2010
- Pentax K200D 2008
- Pentax K20D 2008
- Pentax K-m 2008
- Pentax K110D 2006
- Pentax K100D 2006
- Pentax K10D 2006
- Pentax *ist DL2 2006
- Pentax *ist DL 2005
- Pentax *ist DS 2004
- Pentax *ist D 2003
- Pentax MZ-S crop mode
- Pentax LX crop mode
- Pentax ME crop mode
- Ricoh XR-1 crop mode
- Pentax MX crop mode
- Pentax K-7
- Pentax K-S1
- Pentax K-S2
- Pentax K2000
- Pentax *ist DS2
- Pentax K100D Super
- Samsung GX-10
- Samsung GX-1L
- Samsung GX-1S
Adapt it to other systems#
Similar lenses#
- Sigma 150-500mm f/5-6.3 APO DG OS HSM f/5–6.3
- Sigma 100-300mm f/4 APO EX DG HSM f/4
- Sigma 100-300mm f/4 APO EX DG HSM + Kenko Teleplus PRO 300 AF 1.4× DGX ext. f/4
- Pentax smc Pentax-M 80-200mm f/4.5 f/4.5
- Tamron AF 80-210mm f/4.5-5.6 280D f/4.5–5.6
- Tokina 80-200mm f/4.5-5.6 SZ-X f/4.5–5.6
- Tokina AF 80-200mm f/2.8 AT-X 828 Pro f/2.8
- Tokina AT-X AF SD 80-400mm f/4.5-5.6 f/4.5–5.6
- Pentax smc Pentax-M 75-150mm f/4 f/4
- Pentax HD Pentax-D FA* 70-200mm f/2.8 ED DC AW f/2.8
- Sigma 70-200mm f/2.8 EX DG HSM f/2.8
- Sigma 70-200mm f/2.8 EX DG OS HSM f/2.8
Frequently asked questions#
Is the Pentax HD Pentax-D FA 150-450mm f/4.5-5.6 ED DC AW full frame?
No — it is designed for APS-C sensors. On a full-frame body it vignettes or triggers crop mode.
What is the Pentax HD Pentax-D FA 150-450mm f/4.5-5.6 ED DC AW equivalent to on APS-C?
Its focal length is already the real value for APS-C: 150–450 mm frames like 230–690 mm on full frame.
What is the Pentax HD Pentax-D FA 150-450mm f/4.5-5.6 ED DC AW good for?
As a telephoto zoom it suits sport, wildlife, events and compressed landscapes.
Sources & licences#
- Lensfun lens database — CC BY-SA 3.0
Last updated October 03, 2026 · How we calculate · Sources