Specification
| Mount | M42x1 |
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| Focal length, mm | 300 |
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| Maximum aperture | f/4.5 |
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| Angle of View | 15° |
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| Minimum focusing distance | 0.3 m |
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| Filter size | 88 mm |
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| Construction | 4 elements in 3 groups |
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| Center/edge resolution | 25/18 line pairs per millimeter |
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| Dimensions, (DxL) | 98x240 mm |
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| Weight, kg | 1.73 |
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Tair-3 4.5/300