Quick answer
A 300mm f/4 telephoto prime for Pentax APS-C bodies with SDM focusing. It weighs about 1,070 g and takes 77mm filters.
Pros
- f/4 at 300mm
- SDM autofocus
- Star-series build
- Close focus 1.4 m
Cons
- APS-C only
- Heavy
- No lens stabilization
Verdict
A premium telephoto for Pentax crop bodies.
About this lens
A 300mm f/4.0 telephoto prime lens, the Pentax smc DA* 300mm F4.0 ED (IF) SDM is designed for Pentax K mount bodies, with extra-low dispersion glass. A premium weather-resistant "Star" series lens for Pentax K-mount cameras.
Pentax smc DA* 300mm F4.0 ED (IF) SDM specifications
- Brand
- Pentax
- Mount
- Pentax K
- Focal length
- 300mm
- Maximum aperture
- f/4.0
- Lens type
- Prime
- Format coverage
- aps-c
- Minimum focus distance
- 1.4 m
- Filter thread
- 77 mm
- Weight
- 1070 g
- Length
- 184 mm
- Diameter
- 83 mm
Specification source: wikidata.org
What can you shoot with the Pentax smc DA* 300mm F4.0 ED (IF) SDM?
- Wildlife
- Sports
- Birding
Its moderate maximum aperture works best in good light or with a higher ISO.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| APS-C | 1.5x | 450mm | 4.6° | 5.5° |
Frequently asked questions
What filter size does the Pentax DA* 300mm f/4 use?
The filter thread is 77mm, so standard 77mm polarizers and ND filters screw straight onto the front.
How close can it focus?
Minimum focus is 1.4 m. At this focal length that keeps you well back from the subject.
Is the Pentax DA* 300mm f/4 a full-frame lens?
No. It is designed for APS-C sensors, so on a full-frame body it will crop or vignette.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
