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Pentax smc FA 20mm f/2.8

Pentax smc FA 20mm f/2.8 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 PENTAX smc P-FA 20mm lens offers outstanding versatility and is perfectly suited for architectural and outdoor photography. Weighing a mere 9 ounces, its compact and lightweight dimensions make it ideal for traveling. Like all PENTAX lenses, the smc P-FA 20mm F2.8 wide-angle lens is treated with the acclaimed smc coating for maximum light transmission, sharp definition, and high contrast while minimizing flare and ghost imaging.

Pentax smc FA 20mm f/2.8 Specification

Available mount(s) Pentax K
Application(s) Interiors, Architecture
Category(s) Wide angle prime
Multiplier
Stabilizer no
Focal length 20 mm (prime)
Lens construction 10 elements in 9 groups
Angle of view 35mm: 94°
digital: N/A
Number of blades N/A
Maximum aperture f/2.8
Minimum aperture N/A
Minimum focusing distance 24 cm
Magnification 0.12×
Filter size 67 mm
Size ∅ 70 × 44 mm
Weight 255 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 S70-70 (not included)
Lens hood MH-RB67 (not included)
Tripod adapter N/A
Discontinued yes
Pentax smc FA 20mm f/2.8 Specification

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