Full frame sized imageLenses 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 AFLenses with ultrasonic focusing mechanism tend to be quiter and faster than traditionally focusing lenses. No stepping motor AFLenses 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 usedLow Dispersion lens elements help to reduce chromatic aberration. Not stabilizedImage 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. Internal FocusingInternally focusing lenses don't change their size while setting focus. |
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The PENTAX smc P-FA 135mm F2.8 (IF) is a great portrait lens as it allows a comfortable distance between the photographer and subject. It allows for a shallow depth of field and is ideal for working in low-light conditions. It features an internal focus system to make focusing smoother and faster, and is treated with the acclaimed smc coating for maximum light transmission, sharp definition, and high contrast while minimizing flare and ghost imaging.
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Available mount(s) | Pentax K |
Application(s) | Portrait, Sports |
Category(s) | Telephoto prime |
Multiplier | 1× |
Stabilizer | no |
Focal length | 135 mm (prime) |
Lens construction | 8 elements in 7 groups |
Angle of view |
35mm: 18° digital: N/A |
Number of blades | N/A |
Maximum aperture | f/2.8 |
Minimum aperture | f/22 |
Minimum focusing distance | 70 cm |
Magnification | N/A |
Filter size | 52 mm |
Size | ∅ 63 × 79 mm |
Weight | 375 g |
Notes |
built-in lens hood |
AF speed | N/A |
AF sound | |
Internal focusing | yes |
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 | S80-120 (not included) |
Lens hood | N/A |
Tripod adapter | N/A |
Discontinued | yes |