The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 8-25mm F4 Pro and the Panasonic 10-25mm F1.7 ASPH for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Panasonic 10-25mm F1.7 ASPH is the longer of the two lenses at 128mm. The Olympus ED 8-25mm F4 Pro with a length of 89mm, is 39mm shorter. Besides being longer, the Panasonic 10-25mm F1.7 ASPH also has a larger diameter of 88mm compared to the Olympus ED 8-25mm F4 Pro's 77mm diameter.
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Below you can find a scaled side-by-side image of Olympus ED 8-25mm F4 Pro and Panasonic 10-25mm F1.7 ASPH to get a better idea of how their sizes compare in real life.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Olympus ED 8-25mm F4 Pro weighs 411g, which means it is 279g (40%) lighter than the Panasonic 10-25mm F1.7 ASPH which has a weight of 690g.
Below you can find the dimension and weight table of the Wideangle Zoom Lenses in Micro Four Thirds Mount for size comparison purposes.
Ultra-Wideangle Lenses in Micro Four Thirds Mount for Size Comparison
Filter Threads
The Olympus ED 8-25mm F4 Pro has a filter size of 72mm whereas the Panasonic 10-25mm F1.7 ASPH has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Olympus ED 8-25mm F4 Pro:
And these are the 77mm filters that we recommend for the Panasonic 10-25mm F1.7 ASPH:
Lens Mounts
Both the Olympus ED 8-25mm F4 Pro and the Panasonic 10-25mm F1.7 ASPH has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-1 II, Panasonic G9 II and OM System OM-5.
Focal Range
Olympus ED 8-25mm F4 Pro has a focal range of 8-25mm and
3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
16-50mm when used on a FourThirds format camera.
On the other hand, the Panasonic 10-25mm F1.7 ASPH has a focal range of 10-25mm and 2.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 20-50mm when used on a FourThirds format camera.