Imaging Resource posted their full Panasonic 25mm f/1.7 review:
Panasonic has done very well with this lens: for the price point, you get a very sharp, very capable lens that’s easy to use. If the kit lens isn’t fast for your needs, the Panasonic 25mm ƒ/1.7 would be an excellent companion.
Ok, this is going to create some discussions here. We often see MFT vs APS-C camera comparisons but nobody every tried this until today: TheOnlinePhotographer (Click here) compared Micro Four Thirds vs. medium format film and the conclusion is:
“Image quality is a multidimensional thing, some of which can be quantified and some not. Still, by no measure of image quality does a good Micro 4/3 camera and lens perform more poorly than a good medium format film rig, and by some measures it performs considerably better. My overall subjective evaluation is that the aggregate image quality of Micro 4/3 today, in film terms, falls midway between 6×7 medium format and 4×5-inch large format.
Almost everyone you can find who is still arguing that Micro 4/3 can’t match up to professional film has not done substantial amounts of serious work in both media. I believe the technical term is ‘talking through one’s hat.’“
Surprised to read that? Me yes!
Subjective assessment of images taken at other focal lengths implied image sharpness was maintained up to about 250mm, after which it began to tail off a little. However, images were still nice and sharp at 400mm and judicious application of unsharp masking before printing yielded excellent results.
Some people may think AU$2199 is a lot to pay for a fairly specialised lens. However, we feel this lens represents excellent value for money, particularly when compared with similar lenses for DSLR cameras, which weight several kilograms more and cost at least four times the price of Panasonic’s 100-400mm f/4.0-6.3 lens.
I’ll say it up-front: the Panasonic 100-400mm really surprised me. I wasn’t expecting the lens to be that sharp at all focal lengths and the fastest apertures. Although I used 300mm and 400mm most of the time for my wildlife photos, I also found it helpful to be able to pull back to 100mm. It can be an excellent choice not only for birds and wildlife but also for outdoor sports and other applications where a long lens is required.
The resolution (in lp/mm) of the Panasonic 100-400 mm is so high that a 24-megapixel camera with a larger sensor takes pictures that aren’t any sharper. You will not be bothered by vignetting and distortion. Thanks to the built-in image stabilization, you have a quiet viewfinder image when you shoot by hand, are less likely to get a motion-blurred shot in low light and get quiet video recordings. The robust construction and the extra sealing against dust and splashwater make this super-telephoto zoom perfectly suited for use under the most extreme conditions. Micro-43 users had to wait a long time for this lens, but it is worth the wait. This is an absolute winner.
Really a great lens!