The Panasonic Lumix 20mm f/1.7 Aspheric G-Series Lens, a Micro Four Thirds system large-diameter wide-angle f/1.7 20mm (40mm in 35mm camera equivalent) manual focus pancake-style lens. The lens operates a unique manual focus system which drives the focusing group indirectly via the lens's autofocus motor. The feel of the manual focus ring remains the same whether the camera is set to auto or manual focus which can be problematic in some shooting scenarios. The advantage is that turning the manual focus ring quickly makes very fast initial adjustments, but then turning it slowly allows very fine focusing.
This lens produces bright photos with a dramatic soft focus even in dimly lit locations. Its compact, easy-to-carry size is also ideal for capturing everyday scenes and snapshots.
| Performance | |
|---|---|
| Focal Length |
20 mm Comparable Four Thirds and Micro 4/3 Focal Length: 40 mm |
| Aperture |
Maximum: f/1.7 Minimum: f/16 |
| Camera Mount Type | Micro Four Thirds |
| Format Compatibility | Micro Four Thirds |
| Angle of View | 57° |
| Minimum Focus Distance | 7.92" (20 cm) |
| Magnification | 0.13x |
| Maximum Reproduction Ratio | 1:7.69 |
| Groups/Elements | 5/7 |
| Diaphragm Blades | 7 |
| Features | |
|---|---|
| Image Stabilization | No |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | 46 mm |
| Dimensions (DxL) | Approx. 2.48 x 1.81" (6.30 x 4.60 cm) |
| Weight | 3.5 oz (99 g) |
REVIEW SNAPSHOT®
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Most Liked Positive Review
Excellent in low light, perfect for GF1
This lens goes perfectly with my Panasonic GF1. At 20mm (40mm equivalent), it is many times faster than my Panasonic 14-45mm micro 4/3 lens at the same focal length and yet ...Read complete review
This lens goes perfectly with my Panasonic GF1. At 20mm (40mm equivalent), it is many times faster than my Panasonic 14-45mm micro 4/3 lens at the same focal length and yet still wide enough to be useful for everyday photos. It weighs about the same as the other lens (less than one pound), despite being so compact.
This lens is so much faster than the 14-45mm that you will be able to shoot at ISO 100 what would take ISO 800 or higher with the 14-45mm. It's an excellent lens for indoor lighting and low-light conditions.
The only downsides I have encountered are slight vignetting and slight coma at maximum aperture. Above f/2.0 these minor issues are diminished. Not a big deal.
Note also that the auto focus mechanism makes some noise, which may be audible when taking video with sound. This has not been a problem for me, but YMMV. Manual focusing is an option.
Since Panasonic's other micro 4/3 lenses take 52mm filters, I use a B+W 46mm to 52mm (lens to filter) step-up ring to make this one compatible (you will need to add a 52mm lens cap, of course). I recently switched to B+W filters for the build quality (brass rings!) and the exceptional lens coatings which eliminate flare and are easy to clean.
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Most Liked Negative Review
Compact and reasonable quality
There aren't too many options for fast primes for micro 4/3rds. This is a nice little compact and lightweight 40mm equivalent that performs similarly to most of the cheap 50mm f/1.8 primes out...Read complete review
There aren't too many options for fast primes for micro 4/3rds. This is a nice little compact and lightweight 40mm equivalent that performs similarly to most of the cheap 50mm f/1.8 primes out there at substantially higher cost. On my G2 it tells me to switch out of AF-C into AF-S focus mode when I put it on the camera. The lack of ability to allow continuous focus at shallow DOF makes it much more difficult to get the focus right and thus makes the wide open shooting less effective. However, the quality of the image is reasonably good provided you can get the critical focus at the right point.
The lens is difficult to mount and unmount since it's so short and Panasonic did not give any kind of grippy thing on the barrel to assist with twisting it on. Consequently my fingers slip and I find it more difficult to put on or remove than any lens I've ever owned.
Another, surprising thing for me is that this is the only Lumix lens I've bought thus far that doesn't come with a lens hood. I imagine that's to keep it looking as tiny as possible and because the lens isn't physically long enough to flip the hood around for storage. I imagine the lack of a hood will lead to reduced contrast and a higher level of flare when shooting in heavily side lit situations.
If you have a need for a fast prime in the bag then this is really the only current option. Optically it is superior to the kit lens (14-42) but no where near the Lumix 7-14 or Leica 45 macro.
When another fast prime becomes available I will probably consider it and swap this one out. It does fill a need but doesn't stand out to me in any way other than its diminutive size.
Reviewed by 370 customers
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Compact and sharp, a little gem for micro 4/3 cameras. Images rival my Canon 60D. Limited only by the m4/3 sensor.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
I love the bokeh of this lens when used wide open and it makes for some great photos.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
It is a good len. I use it on Olympus EPL-2, I don't find the tightness as describe in other forum.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
The lens is so much better than the lens that came with my Panasonic Lumix GF3. The quality and focus makes all the difference in the cameras ability.
A great lens can make a camera. When you pay this price you expect the quality to be there.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
I just bought an Olympus m4/3 and opted for this lens over Olympus' own 17mm. What a good decision it was! I can take photographs indoors and at night without a flash with the fast little guy. With a UV filter it isn't so "pancake" anymore but it is still much thinner than the other lenses I'm using.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Used for low light photography, indoor and street. Great results. Just slightly slow to focus, but really not a problem for me.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
I love this lens - it is now the default lens I leave on my camera.
I can't get enough of the wonderfully shallow depth-of-field that the large aperture gives, and even though there's no image stablization built into this lens, it is easy to hand-hold in low light even at low ISO and still get nice sharp shots.
That this lens is so small and lightweight is just icing on the cake.
The only downside of this (and, presumably any other pancake-style lens) is that it's a little hard to get on and off the camera, since it's so small there's little area to grab when twisting it on or off.
Other than that, this is a fantastic lens, perfect for everyday use, especially indoors under less-than-ideal lighting.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
great item.
affordable price, convenience compact size.
fast focusing.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Awesome lens, sharp and beautiful, with nice bokeh. My primary lens on my camera. Only downside is a slower focus speed, but the images that come out of it is totally worth it.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Slightly tough to attach to my EPL1, but overall this lens is fantastic. Sharp even at f1.7!
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
This lens is pretty sharp so far I got nice pictures out of it the only thing missing is OIS and for video it sometimes loses focus for a few seconds when taping even with the new firmware other than that cannot complain does what it needs fast lens hardly ever need to use flash and compact on my GX1
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
OK. So I was a camera store in England and the proprietor raved about this lens. What the heck, its just money so I bought it.
Its everything they say it is. Small, lightweight, crisp results from the superb optics. I was curious if it would work with my Lumix GH1 (another satisfied B&H purchase), especially in the automatic mode.
And, by the rating you'll see it worked seamlessly.
So if you want a good, versatile lens, want to reduce your load in weight and size, this lens fits the bill. Speaking of the bill, it really is a value buy in my opinion. Thanks Panasonic.
Now work on improving your telephoto lens which hasn't fared well in the reviews. Move to this standard and I'd buy that too.
B&H should have a pointer to filters that fit this 20 mm form factor (e.g. UV) to protect the investment. The guide indicates they can get sticky.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
I had read about how great this small, fast prime lens was, and it was even better than I expected. It has far better image quality than the kit 14-42 lens that came with my E-PM1, and can be used wide open with only minimal loss of quality. Great for low light situations and intimate shots of young children. The focussing isn't as quick as newer m.zuiko mft lenses, but the wide aperture allows for fast shutter speeds to capture kids in action.
While I don't shoot many movies, the noise of the lens focusing is definitely noticeable on video - I would recommend manual focusing if this is an issue.
B&H was fast and easy to deal with. While shipping to Canada via purolator is very economical, they are probably the most incompetent shipping option to Canada - the lens arrived in canada 2 days after I ordered it, but through a series of mishaps with Purolator, I didn't get the lend until a week later! Canadians, keep on top of the shipper or be prepared to wait a bit for your order!
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Although its aperture is not as large as 25mm f1.4, its f1.7 is large enough IMO. Besides, for indoor environment, 20mm is more acceptable than 25mm. The color and sharpness are also satisfying. I like my choice.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
It allow light to enter in the camera. You can take very good picture also in low light sittuations without flash need
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Great for indoor portrait photography. Beautiful bokeh. Using this for my GF1 -- since it is so fast, lack of stabilization is not noticeable. Makes the Lumix considerably more compact, and much better than the kit lens. Worth every penny.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Now that I've discovered this lens for my GF3 I found myself not reaching for it but keeping it on my camera all the times, as a matter of fact I am selling my kit lens 14-42mm.
small and matches with the camera well also because of the pop-up flash not suitable with long zooms like 45-200mm and even with the kit lens obstructing with flash light somehow. This is a winner and well constructed.
The only con I could see is it doesn't make toast for me in the morning.lol.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
This lens, the panasonic 20mm f/1.7, is the best compliment to the kit lens. I use it for everything except changeable focal length and macro. The camera is much smaller with the small lens and is pocketable to make it much more usable.
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
I am commercial photographer - I wanted something that I could use on a small 4/3 system camera for casual use - Lens is fast focus and sharp
this is great for when you want quality but don't want to carry around a big camera
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Comments about Panasonic Lumix 20mm f/1.7 Aspheric G- Series Lens:
Since it's introduction since 2009, this pancake lens still remains a hit with micro-4/3 users. Why? because it's small, and incredibly sharp. Only downside I can think of about this lens and the reason why I had to repurchase it recently also comes down to size. My original lens had the misfortune of pealing out of my camera bag on to a stone railing like a loose coin and roll its way into a scum filled pond. That was the end of my relationship with my first lens but not my love affair with this baby. Now that I finally upgraded to my new lumix body, I wanted to make it up with her cuz, boy is this lens beautiful.
She's not the fastest AF lens in the stable anymore but this lens is still in center sharpness next to the Leica Summilux 25mm f/1.4. Her slim lithe profile and her other perky friend the 14mm f/2.5 are instant hits. Just keep them out of the hot tub.
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