Panasonic Lumix G 25mm F1.7 ASPH
The Panasonic Lumix G 25mm F1.7 ASPH is a fixed focal length interchangeable camera lens announced by Panasonic on September 2, 2015.
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| Maker | Panasonic |
|---|---|
| Lens mount(s) | Micro Four Thirds |
| Part number | H-H025E |
| Technical data | |
| Type | Prime |
| Focus drive | Stepper motor |
| Focal length | 25mm |
| Focal length (35mm equiv.) | 50mm |
| Crop factor | 47° |
| Aperture (max/min) | max f1.7 min f22 |
| Close focus distance | 0.25 metres (0.82 ft) |
| Max. magnification | 0.14 (0.28x 35mm equvivalent) |
| Diaphragm blades | 7 |
| Construction | 8 elements in 7 groups |
| Features | |
| Manual focus override |  No |
| Weather-sealing | No |
| Lens-based stabilization | No |
| Aperture ring | No |
| Physical | |
| Max. length | 52 millimetres (2.0 in) |
| Diameter | 61 millimetres (2.4 in) |
| Weight | 125 grams (0.276 lb) |
| Filter diameter | 46mm |
| History | |
| Introduction | 2015 |
| Retail info | |
| MSRP | 249.99 USD USD |
It has a stepper-motor autofocus and electronic aperture control. The focus ring is not mechanically connected to the lens elements, which means that the manual focus is also controlled through the autofocus motor. The focus ring has a variable transmission dependig on how fast it is turned.
It is a product in the Micro Four Thirds system. That means it is fully compatible with every Micro Four Thirds camera body, not just Panasonic, but Olympus, Xiaomi, Kodak and Blackmagic cameras as well. This also means that it is made for cameras with a 17.3 x 13 mm (FourThirds) image sensor, which has a 2x crop compared to 35mm cameras. Therefore this lens has an equvivalent focal length of 50mm.
This lens has an 'HD' badge on it, which means its capable of high quality video recording with silent and smooth autofocus.
It has 8 lens elements in 7 groups. 2 of them are aspherical, which are used to maintain image quality while using less elements. There is also one ultra-high refleciton element.
The lens has a 7-blade aperture diagram for stopped-down background blur quality.
The minimum focus distance is 25 centimeters (0.25 m / 0.82 ft) and the maximum magnification is 0.14x (0.28x 35mm equvivalent) of this lens, so it is not a macro lens at all.
The Panasonic 25mm F1.7 lens is available in two colors: black and silver.