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Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH Overview



Introduction

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH (H-X2550) is a brand new quick telephoto zoom lens for the Micro 4 Thirds digicam system. It’s the world’s first telephoto zoom lens to supply a most aperture of f/1.7 all through its vary.

That includes silent, high-speed focusing due to a 240fps high-speed inside focus drive system, the mud/splash/freeze-resistant Panasonic 25-50mm lens presents a flexible focal vary of 50-100mm in 35mm phrases.

Optically it is comprised of 16 parts in 11 teams, together with one aspherical lens, three ED (Additional-low Dispersion) lenses and one UHR (extremely excessive refractive) lens, and has 9 diaphragm blades which assist give the aperture a rounded form.

The Leica DG 25-50mm has a de-clicked aperture ring for simpler video recording, and there is additionally a conventional focus clutch mechanism which allows prompt AF/MF switching and correct guide focusing.

This lens has been designed to completely match the Leica DG Vario-Summilux 10-25mm F1.7 ASPH lens, with the pair successfully functioning as eight conventional mounted focal size lenses (20mm / 24mm / 28mm / 35mm / 50mm / 75mm / 85mm / 100mm) while providing the identical or an excellent larger degree of high quality.

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens is priced at £1,799.99 / $1,799.99 within the UK and the US, respectively.

Ease of Use

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

Given the quick most aperture of f/1.7 on supply all through the zoom vary, the Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH is unsurprisingly massive and heavy for a Micro 4 Thirds lens, measuring 127.6mm / 5.02inch in size and weighing 654g / 1.44lb, which is about the identical measurement and weight because the 10-25mm F1.7 lens.

Not like the 10-25mm lens, although, zooming is inside, so the lens barrel would not extends when zooming out from 25mm to the 50mm focal size.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

The lens has a spotlight clutch mechanism relatively than an AF/M change for selecting the focusing mode.

When the focusing ring is pushed ahead, the lens is locked into autofocus mode.

When the focusing ring is pulled again, the focusing distance scale with depth-of-field markings is revealed and you’ll manually focus with the lens – very neat.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

Word that it is a focus-by-wire lens which makes use of a stepping motor. There are arduous stops at each ends of the 0.28m/0.92ft to infinity focusing vary, however no depth of area scale on the barrel.

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens presents silent focusing, making it good for video recording. In use, we discovered the AF system to be very fast, correct and dependable on the flagship Panasonic GH5 II digicam.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH has a conventional aperture ring on the lens barrel, which lets you set the aperture in 1/3 steps, full with aperture markings on the lens barrel. The aperture can also be proven within the viewfinder or on the LCD display as you modify it.

The relatively skinny aperture ring toggles between auto aperture management (the ring is ready to A) or guide aperture management (the ring is ready to one of many aperture values).

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

The aperture ring proved to be properly damped in use, though as a result of the ring is declicked, the lens is healthier suited to video use than for stills, because it’s troublesome to set the aperture precisely to one of many 1/third values with out having to double-check it first by way of the viewfinder or rear LCD display.

The 77mm filter thread doesn’t rotate on focus, which is sweet information for customers of polarisers and graduated impartial density filters.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH has a lens mount is, fortunately, product of metallic. The lens additionally boasts a mud and splash-proof design and is even freeze-proof all the way down to -10C, though Panasonic stops wanting calling it absolutely weatherproof.

Usefully the lens comes with an excellent high quality spherical lens hood with a button to lock it into place and launch it. Panasonic additionally embrace a material storage bag within the field.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

Focal Vary

On the 25mm finish of the zoom vary, the lens has a diagonal angle of view of 47°, equal to that of a 50mm lens in a 35mm system.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

25mm

On the 25mm finish, the angle of view is 24°, which is similar as that of a 100mm lens on a 35mm full-frame digicam.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

50mm

Chromatic Aberrations

Chromatic aberrations, sometimes seen as purple or blue fringes alongside contrasty edges, usually are not an issue with the Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

25mm

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

50mm

Distortion

There may be just about no distortion seen at both finish of the zoom vary.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

25mm

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

50mm

Gentle Fall-off

With the Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens set to its most aperture of f/1.7, you’ll be able to see some gentle fall-off within the corners, however nothing too extreme.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

25mm

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

50mm

Macro

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens has a most 0.21x magnification ranking and is ready to focus at 0.28m / 0.92ft away from the topic on the 25mm focal size and 0.31m/1.02ft on the 50mm focal size.

Sunstars and Flare

The Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH produces very good sunstars when stopped-down to f/16, as proven beneath.

The lens is kind of vulnerable to flare when taking pictures immediately into the solar, although, even with the lens hood fitted.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

Bokeh

Bokeh is a phrase used for the out-of-focus areas of {a photograph}, and is often described in qualitative phrases, comparable to easy / creamy / harsh and so forth.

Within the Leica DG Vario-Summilux 25-50mm F1.7 ASPH lens, Panasonic have employed a diaphragm with 9 rounded blades, which has resulted in very good bokeh, no less than in our opinion.

Nonetheless, recognising that bokeh analysis is subjective, we’ve supplied a number of examples in your perusal.

Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH
Panasonic Leica DG Vario-Summilux 25-50mm F1.7 ASPH

Sharpness

With a purpose to present you ways sharp this lens is, we’re offering 100% crops on the next pages.

We will be happy to hear your thoughts

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