The Pentax SMC FA 645 120mm f/4 Macro is macro/short-telephoto length lens that’s compatible with the . Key features include:
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True 1:1 macro capability
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15.4-inch minimum focusing distance
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Excellent for portraiture
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Advanced optical design for high-quality images
Dedicated Macro Lens. With 35mm focal length equivalent to 94mm after the sensor crop-factor, the 120mm f/4 Macro offers users true 1:1 macro capability. It has a 15.4-inch minimum focusing distance, with a focus-limit switch for setting the focusing distance range to increase autofocus speed. Additionally, it enables the lens to be very useful as a portrait lens.
Optics. The 120mm f/4 Macro features an extra-low dispersion element that minimizes chromatic aberrations and provides sharp, high-contrast images. It uses a floating mechanism and an independently moving aperture mechanism to maximize out-of-focus areas.
Please Note. This is a legacy lens that was originally designed for medium-format film cameras. We’ve noticed that it tends to slightly front- or back-focus, so you’ll want to make sure you microfocus adjust before you start shooting.
| Aperture |
f/4-32 |
| Autofocus |
Autofocus |
| Brand |
Pentax |
| Compatibility |
Medium Format |
| Diameter |
3.25″ |
| Dimensions |
Length: 4.33″ |
| Filter Size |
67.0mm (nonrotating front element) |
| Filter Style |
nonrotating front element |
| Focal Length |
120.0-120.0 |
| Groups/Elements |
7/9 |
| Hood Included |
Yes |
| Hood Type |
PH-RBD67 |
| Image Stabilization |
No |
| Item Type |
Lens |
| Lens Type |
Telephoto |
| Low Dispersion Elements |
1 |
| Max Aperture |
4.0 |
| Maximum Magnification |
1x |
| Minimum Aperture |
22.0 |
| Minimum Focusing Distance |
1.3feet |
| Mount |
Pentax 645 |
| Weather Resistant |
N/A |
| Weight |
1.54 lbs. |
| Zoom Method |
NA |










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