Pentax DA* 300mm lens
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 | |
| Maker | Pentax |
|---|---|
| Technical data | |
| Type | Prime |
| Focal length | 300mm |
| Focal length (35mm equiv.) | 450mm |
| Aperture (max/min) | f/4 / f/32 |
| Close focus distance | 140 centimetres (55 in) |
| Max. magnification | 0.24x |
| Diaphragm blades | 9 |
| Construction | 8 elements in 6 groups |
| Features | |
| Manual focus override |  Yes |
| Ultrasonic motor | Yes |
| Weather-sealing | Yes |
| Unique features | Quick-shift focus, SP (Super Protect) coating, filter window, detachable tripod mount |
| Application | Supertele |
| Physical | |
| Max. length | 184 millimetres (7.2 in) |
| Diameter | 83 millimetres (3.3 in) |
| Weight | 1,070 grams (38 oz) |
| Filter diameter | 77mm |
| Accessories | |
| Lens hood | PH-RBK 77 mm |
| Angle of view | |
| Diagonal | 5.4 ° |
| Retail info | |
| MSRP | 1,399.95 USD |
The smc PENTAX-DA* 1:4 300mm ED [IF] SDM is a supertele prime lens for Pentax K-mount. It uses Pentax' silent SDM motor for autofocus on compatible cameras (K10D[1] and K200D upwards), and has Quick Shift Focus to allow manual adjustments in autofocus mode.
