Posted 20 hours ago

Panasonic Lumix G 20mm/F1.7 Pancake Lens

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I don't have the 17mm. However the 20mm has better IQ scores on Dxomark. Also the EM1 seems to correct the CA and is not known to suffer banding. Many posts agree that the AF is slow and noisy. For stills this has not ben a problem for me. It is a pity that comparison doesn't fix the field of view rather than the camera position - all the 20mm shots are about 15% larger as a result which complicates comparing resolved detail.

A thirty-second exposure as the sun sets behind lower Manhattan. The weather was odd that day, and sunset had a sort of apocalyptic feel. On an Oly body the aperture ring don't even work, and the 20mm may randomly produce banding at high ISO, so there's that.I have a GM1 paired with 14/2.5. Perfect street setup. Love the 14/2.5 warmer colors - nice for low-light/indoors group photos. Same problem there (FoV difference) but my verdict is clear anyway. Interestingly, Ming Thein (who is an excellent photographer and whose test shots I much appreciate) came to different conclusions based on the same images. Here are my comments on his comments for those interested:

Ever since the time of introduction, the LUMIX GH6 gained high attention and have been acclaimed after its release to the market not only from the conventional GH users but also from the new GH users worldwide. The GH6 is planned to “evolve” with firmware updates to further enhance its performance and usability for professional video creators, as previously announced. With this update, it is possible to load low compression and high quality data directly to the PC without transcoding for smooth NLE(non-linear editing) I went with the 20mm for its size when used with GF7/GM1/ GM5. It certainly isn’t a fast focusing lens but for my usage speed doesn’t matter. I’ll be keeping it, unlike the 25mm f1.7. I handled the 15mm, it is much deeper but offers more by way of direct control rings. The 15mm is much more expensive. The 14 f2.5 is the most compact option, but like the 12-32 there's no lens hood for it; I don't know if a hood exists for the 20mm but doubt it.Image quality seems to be a bit of a toss-up between the two, although on these forums it seems like the 15mm garners more praise. The 20mm is smaller, but the 15mm doesn't appear significantly longer... And use both. The difference is I half press with the 20. It's at most a half second. I got great shots at our family Christmas dinner with it. Works fine at 1.7 and great at 2.0. Color and sharpness for both lenses are excellent. The difference in focal length is sufficient for me to justify both. This is where the tide starts to turn in Panasonic’s favor. I performed several real world tests with both lenses and, as you can see from the results in this post, the Panasonic beats the Olympus in just about every aspect of image quality. It is sharper, it has nicer bokeh, and I find the colors more pleasing although there isn’t a major difference between the two. Both lenses have problems with Chromatic Aberrations and blooming but that is nothing surprising for the M43 format. In the end, I have to give this category to the Panasonic as it edged out the Olympus in every comparison shot that was taken. Panasonic 20mm shot at 1/400 sec, f1.7 Olympus 17mm shot at 1/320sec, f1.8 100% crops from the images above. Olympus is on the left, Panasonic is on the right. Olympus 17mm shot at 1/500sec, f8 Panasonic 20mm shot at 1/500sec, f8 100% crops from the images above. Olympus is on the left, Panasonic is on the right. Olympus 17mm shot at 1/1250sec, f1.8 Panasonic 20mm shot at 1/1600sec, f1.7 100% crops from the images above. Olympus is on the left, Panasonic is on the right. Olympus 17mm shot at 1/200sec, f1.8 Panasonic 20mm shot at 1/200sec, f1.7 100% crops from the images above. Olympus is on the left, Panasonic is on the right. Panasonic 20mm shot at 1/125sec, f5.6 Olympus 17mm shot at 1/125sec, f5.6 100% crop of the images above. Olympus is on the left, Panasonic is on the right.

It's been discussed ad nauseam, so you can probably use the search tool and find plenty of opposing viewpoints if you're in a hurry (not that I'm whining about another thread on the subject, or I wouldn't be commenting). They're cheaper than PL 15/1.7 but also work well as hybrid Still/Video lens as well. 20/1.7 is good STILL photo lens, but not a hybrid video lens. You're satisfaction with 20/1.7 highly depends on how much video you shoot. In term of AF speed, all other 4 lens focus faster than 20/1.7. 20/1.7 is one of the oldest M43 lens and AF motor hasn't been improved. Shooting assist functions including V-Log L View Assist, Luminance Spot Meter, and Zebra Pattern can be used during RAW output. It is possible to assign [HDMI RAW data output] function to the Fn button and users can directly turned it ON or OFF from the camera. Through the firmware updates, Panasonic proposes future-ready solutions for more flexible filmmaking workflow using mirrorless cameras.It can detect the eyes / face at a 2x faster recognition cycle speed and human / animal at a 5x faster recognition cycle speed. These subjects can be detected even they appear in approximately half the size. *Comparison between before and after updating the firmware.

Shooting assist functions including Luminance Spot Meter, Zebra Pattern can be used during RAW output. I prefer the FOV of the 20mm over the 25mm for the so-called "normal" focal length, but own both a P20 and an O25. They are both sharp, but the O25 renders colors more pleasing to my eye.The AF complaints regarding the 20mm are absolutely NOT overblown if you intend to shoot with C-AF or want AF during video recording. The lens supports neither of those features. The review mentioned noise, which is more of a concern to me, as that could ruin its ability for video. Working together with ATOMOS, a global company that creates innovativetechnologies and cloud services forfilmmakers everywhere, the new firmware enables the output of up to 5.8K / 29.97p and C4K / 119.88p RAW video data over HDMI to be recorded as Apple ProRes RAW on ATOMOS NINJA V and NINJA V+devices.

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