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Pentax smc FA 20-35mm f/4.0 AL

Pentax smc FA 20-35mm f/4.0 AL 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.

 

No 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.

 

No Low Dispersion lens element is used

Low Dispersion lens elements help to reduce chromatic aberration.

 

Not stabilized

Image stabilization helps to reduce blur caused by hand shake, especially at high focal length or in low light situations. Image stabilization can give 1 to 3 stop advantage over none stabilized lens, based on the reciprocal rule.

The smc P-FA Zoom 20mm-35mm f/4 AL compact zoom lens covers angles of view from an ultra-wide 94° at the 20mm setting to a wide 63° at 35mm. It incorporates two aspherical lens elements to reduce distortion and produce sharp, crisp image reproduction. Like all PENTAX-FA lenses, it is treated with PENTAX's acclaimed smc coating for maximum light transmission, sharp definition, and high contrast, while minimizing flare and ghost imaging. Extremely flexible, this lens is ideal for shooting panoramic landscapes and tall buildings.

Pentax smc FA 20-35mm f/4.0 AL Specification

Available mount(s) Pentax K
Application(s) Landscape, Interiors, Architecture
Category(s) Wide angle zoom
Multiplier
Stabilizer no
Focal length 20 - 34 mm (1.7× zoom)
Lens construction N/A
Angle of view 35mm: 94-63°
digital: N/A
Number of blades N/A
Maximum aperture wide: f/4 tele: f/4
Minimum aperture wide: f/22 tele: N/A
Minimum focusing distance 30 cm
Magnification 0.16×
Filter size 58 mm
Size ∅ 69.5 × 68 mm
Weight 245 g
Notes
AF speed N/A
AF sound
Internal focusing N/A
Internal zoom N/A
Fix front lens N/A
Mount type N/A
Weather sealed N/A
Drop in filter N/A
Ultrasonic AF no
Stepping motor AF no
APS-C sized circle no
Low dispersion lens element no
Hard case N/A
Soft case N/A
Lens hood N/A
Tripod adapter N/A
Discontinued yes
Pentax smc FA 20-35mm f/4.0 AL Specification

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