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PENTAX
PENTAX 21330 70-200mm f/2.8 Telephoto Zoom Lens
Telephoto zoom lens covering 70–200 mm with constant f/2.8 aperture, Pentax K mount, 19 elements in 16 groups, weather-resistant construction and 77 mm filter thread
- Part21330
- TypeTelephoto Zoom Lens
- ColorBlack
- Diameter77 mm
- Focus TypeAuto Focus
- Focal Length70 - 200 mm
- Constant f/2.8 aperture across 70-200mm zoom for consistent exposure
- Weather-resistant build with HD and Aero Bright Coating II for flare control
- Fast, quiet autofocus via DC motor suits sports and wildlife
- 19 elements in 16 groups including four super-low dispersion glass elements
- 77 mm filter thread accepts standard accessories and includes hood PH-RBM77
Versatile telephoto zoom for Pentax K-mount
The Pentax 21330 is a 70-200mm f/2.8 telephoto zoom lens built for Pentax K-mount digital SLR cameras. It covers a focal range of 70 to 200 mm with a constant maximum aperture of f/2.8, making it suitable for sports, wildlife, landscape and outdoor photography. The lens uses 19 elements in 16 groups and focuses as close as 1.2 m (3.9 ft) for a maximum magnification of 0.13x.
Bundled hood, tripod mount and case extend usability
A PH-RBM77 hood, O-TM80 tripod adapter and HS110-230 lens case are included. The hood reduces flare and protects the front element, the adapter provides stable support on a tripod for long sessions, and the case protects the lens during transport. Together they let you shoot in challenging light, work hands-free with heavy gear and carry the kit securely without buying extras separately.
K-mount limits use to Pentax DSLR bodies
The lens mounts only on Pentax K-mount cameras, so it cannot be used natively on other brands or on mirrorless systems without an adapter that may restrict autofocus or aperture control. The constant f/2.8 aperture holds across the zoom range, but the minimum aperture of f/22 and 9 rounded blades define the depth-of-field and bokeh boundaries you can achieve within this system.
Highlights
- Constant f/2.8 aperture across 70-200mm zoom for consistent exposure
- Weather-resistant build with HD and Aero Bright Coating II for flare control
- Fast, quiet autofocus via DC motor suits sports and wildlife
- 19 elements in 16 groups including four super-low dispersion glass elements
- 77 mm filter thread accepts standard accessories and includes hood PH-RBM77
Specifications
| Brand | PENTAX |
|---|---|
| Part | 21330 |
| Type | Telephoto Zoom Lens |
| Color | Black |
| Diameter | 77 mm |
| Focus Type | Auto Focus |
| Focal Length | 70 - 200 mm |
| Aperture | Maximum: f/2.8 Minimum: f/22 |
| Camera Mount | Pentax K |
| Angle of View | 34.5°-12.5° (w/ PENTAX DSLR) |
| Minimum Focus Distance | 3.9' (1.2m) |
| Magnification | 0.13x |
| Lens Construction | 19 elements in 16 groups |
| Filter thread (Diameter) | 77 mm |
| Specifications | DIAPHRAGM CONTROL: Fully Automatic NUMBER OF APERTURE BLADES: 9 APERTURE BLADES Rounded (70mm f/2. 8 200mm f/5.6) TRIPOD ADAPTER: O-TM80 HOOD: PH-RBM77 OBJECTIVE CAP: O-LC77 CASE: Lens Case HS110 - 230 NOTES: HD Coating, SP (Super Protect) Coating, Aero-Bright coating, Quick-shift Focus, All Weather construction |
| Autofocus | Yes |
| Features | PENTAX intermediate range zoom lens for versatility in capturing distant subjects in all weather conditions. Ideal for sports, landscape, wildlife and outdoor applications. Shoot discreetly with in-lens, direct current (DC) Auto Focus motor operation for smooth & quiet performance. Treated with state-of-the-art HD (High Definition) technology; a high grade, multi-layer coating, allowing the user to capture crisp, high-contrast images free of flare and ghosting, even under demanding lighting conditions. ED (Extra-low Dispersion) glass lens elements deliver clear, high resolution image |
| Dimensions | 3.60" x 8.00" (W x L) |
| Weight | (W/O HOOD): 61.90 oz. (W/ HOOD): 64.70 oz. (W/ HOOD AND TRIPOD MOUNT) 71.20 oz. |
Questions about this item
How often will the 77 mm filter thread need cleaning or replacement?
The 77 mm thread accepts standard protective filters; clean the front element only when dust or smudges affect image quality, using a blower and microfibre cloth.
What limits continuous shooting with the constant f/2.8 aperture across the 70-200 mm range?
The lens maintains f/2.8 throughout the zoom, so the practical limit is the camera body's buffer capacity and shutter durability, not the lens aperture.
How much heat or noise does the DC autofocus motor produce during all-day use?
The built-in DC motor runs quietly and generates minimal heat; the lens barrel stays near ambient temperature even during extended autofocus operation.
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