The Pentax SMC FA 77mm f/1.8 Limited is a high-performance, fast-aperture prime lens for Pentax K-mount cameras. Key features include:
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115mm-equivalent focal range after sensor crop factor
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Excellent for portraiture
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Advanced optical design for high-quality images
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Durable metal build
Excellent for Portraiture. When mounted to an APS-C DSLR, the Pentax SMC FA 77mm f/1.8 Limited has a 35mm-equivalent focal length of 115mm, making it a perfect portrait-length lens.
High-Quality Construction. As one of Pentax’s Limited-series lenses, it offers a high-quality metal build, complete with manual aperture ring and focus distance scale. Its f/1.8, nine-blade aperture allows you to capture images with a very shallow depth-of-field with pleasing out-of-focus highlights. It features a built-in metal lens hood, keeping lens flare at bay.
| Angle of View |
31.5° |
| Aperture |
f1.8-22 |
| Autofocus |
Autofocus |
| Brand |
Pentax |
| Compatibility |
Crop and Full Frame |
| Diameter |
2.9″ |
| Dimensions |
Length: 1.9″ |
| Filter Size |
49.0mm (non-rotating front element) |
| Filter Style |
non-rotating front element |
| Focal Length |
77.0-77.0 |
| Focusing System |
Extending front (non-rotating) |
| Groups/Elements |
6/7 |
| Hood Included |
Yes |
| Hood Type |
built-in |
| Image Stabilization |
No |
| Item Type |
Lens |
| Lens Type |
Normal Range |
| Low Dispersion Elements |
0 |
| Max Aperture |
1.8 |
| Maximum Magnification |
0.14x |
| Minimum Aperture |
22.0 |
| Minimum Focusing Distance |
2.3feet |
| Mount |
Pentax K |
| Weather Resistant |
No |
| Weight |
0.59 lb. |
| Zoom Method |
N/A |










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