FL-YFL5028 / FL-YKL5028
| Format size | 45mm Image Circle | |
| Focal length | 50 mm | |
| Maximum aperture ratio | 1：2.8 | |
| Iris range | 2.8-22 | |
| Mount |
F-mount (bayonet mount) FL-YFL5028 K-mount (PENTAX bayonet mount) FL-YKL5028 |
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Field of view |
4,096×7μm | 57 mm (Magnification: 0.5x) |
| 7,450×4.7μm | 70 mm (Magnification: 0.5x) | |
| 4,096×10μm | 81 mm (Magnification: 0.5x) | |
| Minimum b distance | 0.25 m (Magnification: 0.5x) | |
| Back focal length | 36.99 mm | |
| Filter size | 62 P=0.75 mm | |
| Dimensions |
φ72×56.8 mm（FL-YFL5028） φ72×57.8 mm（FL-YKL5028） |
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Min.~Max. Magnification |
∞ 〜 0.5X | |
| Weight | 370 g | |
| Remarks |
Focus: Lock Screw Iris: Click stop. Not for photographic cameras. |
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