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Pentax smc HD D FA 15-30mm f/2.8 ED SDM WR

Pentax smc HD D FA 15-30mm f/2.8 ED SDM WR lens
Pentax smc HD D FA 15-30mm f/2.8 ED SDM WR lens
 

Full frame sized image

Lenses that create APS-C sized image are designed for digital only. They cannot be used on cameras that have image sensor larger than the APS-C format. These lenses are not suitable for film cameras either.

 

Ultrasonic AF

Lenses with ultrasonic focusing mechanism tend to be quiter and faster than traditionally focusing lenses.

 

No stepping motor AF

Lenses with stepping motor focusing mechanism are better for contrast based focusing, and are quiter and faster than traditionally focusing lenses.

 

One or more Low Dispersion lens element is used

Low Dispersion lens elements help to reduce chromatic aberration.

 

Metal mount

Cheaper lenses are usually equipped with plastic mount, while more expensive, professional lenses have metal mount. In general, metal mounts are more durable, and a good thing to have when lenses are changed a lot. When a camera is used mainly with one lens, the material of the lens mount is not that important.

 

No Internal Zoom

Internally zooming lenses don't change their size while focal length is changing.

 

The front lens is fixed

The fixed front lens is not rotating during zoom and/or focusing. This allows the photographer to use petal shaped lens hood. Fixed front lenses also make the use of polarization filters a lot easier.

 

Weather Sealed

Weather sealed lenses are protected from dust and water. While they are not water proof, these lenses can be used in rain and other humid environments. Some sealings only provide protection against dust or water, not both. Sealing is only available when the lens is used on a similarly weather sealed camera body.

Pentax smc HD D FA 15-30mm f/2.8 ED SDM WR Specification

Available mount(s) Pentax K
Application(s) Landscape, Interiors, Architecture
Category(s) Wide angle zoom
Multiplier
Stabilizer N/A
Focal length 15 - 30 mm (2× zoom)
Lens construction 18 elements in 13 groups
Angle of view 35mm: 111-72°
digital: 86-50°
Number of blades 9
Maximum aperture wide: f/2.8 tele: f/2.8
Minimum aperture wide: f/22 tele: f/22
Minimum focusing distance 28 cm
Magnification 0.2×
Filter size N/A
Size ∅ 98.5 × 143.5 mm
Weight 1040 g
Notes
AF speed N/A
AF sound
Internal focusing N/A
Internal zoom no
Fix front lens yes
Mount type metal
Weather sealed yes
Drop in filter N/A
Ultrasonic AF yes
Stepping motor AF no
APS-C sized circle no
Low dispersion lens element yes
Hard case N/A
Soft case N/A
Lens hood N/A
Tripod adapter N/A
Pentax smc HD D FA 15-30mm f/2.8 ED SDM WR Specification

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