This blog is a user's perspective on the Micro Four Thirds camera system. Read more ...

Lens Buyer's Guide. Panasonic GH4 review.

My lens reviews: Olympus 9mm f/8 fisheye, Lumix G 12-32mm f/3.5-5.6, Leica 25mm f/1.4, Lumix X 12-35mm f/2.8, Lumix X 35-100mm f/2.8, Sigma 30mm f/2.8, Sigma 19mm f/2.8, Lumix X PZ 14-42mm f/3.5-5.6, Lumix X PZ 45-175mm f/4-5.6, Olympus M.Zuiko 45mm f/1.8, Panasonic Lumix G 100-300mm f/4-5.6, Panasonic Leica Lumix DG Macro-Elmarit 45mm f/2.8 1:1 Macro, Panasonic Lumix G 45-200mm f/4-5.6, Panasonic Lumix G 20mm f/1.7 pancake, Panasonic Lumix G 14mm f/2.5 pancake, Panasonic Lumix G HD 14-140mm f/4-5.8, Panasonic Lumix G HD 14-140mm f/3.5-5.6, Panasonic Lumix G 8mm f/3.5 fisheye, Lumix G 7-14mm f/4, Samyang 7.5mm f/3.5 fisheye, Tokina 300mm f/6.3 mirror reflex tele, Lensbaby 5.8mm f/3.5 circular fisheye lens
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Thursday 29 December 2011

AF speed comparison, Lumix G 45-200mm vs Lumix X 45-175mm

The Lumix X PZ 45-175mm f/4-5.6 has the "HD" designation, and it does have the newer "X"branding, indicating that it is a premium lens. I have already seen that it performs better in terms of optical qualities than the older Lumix G 45-200mm f/4-5.6 lens. But what about the focus speed?

I tried to put a figure at about 1 meter distance, close to the minimum focus distance of both lenses. Then I timed the focus. The camera had just been turned on, meaning that the lens is at "close to infinity" focus at the start of the experiment. There is a fair amount of light, with daylight coming in through a window.

Here are the results:

And in a table:

Focal length
Lumix G 45-200mm
Lumix X 45-175mm


In my tests, the newer Lumix X PZ 45-175mm does focus faster than the older Lumix G 45-200mm lens. The older lens was very fast focusing already, so this is a good achievement.

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