Panasonic Lumix G 25mm F1.7 ASPH

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Panasonic Lumix G 25mm F1.7 ASPH

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 (0.28× 35mm equivalent)
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 mm (2.0 in)
Diameter	61 mm (2.4 in)
Weight	125 grams (0.276 lb)
Filter diameter	46 mm (1.8 in)
Accessories
Lens hood	Panasonic SYQ0570
History
Introduction	September 2015
Retail info
MSRP	249.99 USD

The Panasonic Lumix G 25mm F1.7 ASPH is a fixed focal length interchangeable camera lens announced by Panasonic on September 2, 2015.

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 depending 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 × 13 mm (FourThirds) image sensor, which has a 2× crop compared to 35mm cameras. Therefore, this lens has an equivalent 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 eight lens elements in seven groups. Two of them are aspherical, which are used to maintain image quality while using less elements. There is also one ultra-high reflection element.

The lens has a seven-blade aperture diagram for stopped-down background blur quality.

The minimum focus distance is 25 cm (0.25 m; 0.82 ft) and the maximum magnification is 0.14× (0.28× 35mm equivalent) 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.

• 

  The Panasonic Lumix G 25mm F1.7 ASPH opens up to a fairly wide, f/1.7 aperture, which makes it capable of low-light shooting with relatively fast shutter speeds and low sensitivities.

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  The Panasonic Lumix G 25mm F1.7 ASPH mounted on an Olympus OM-D E-M10 Mark II camera body

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  The Panasonic Lumix G 25mm F1.7 ASPH lens with its lens cap on

References[]

• http://www.dpreview.com/products/panasonic/lenses/panasonic_25_1p7_asph/specifications