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Technical Details
- Compact and lightweight pancake lens with f/1.7 maximum aperture
- 2 Aspherical elements for a superb optical performance
- Multi-coated lens elements reduce ghosting and flare
- Contrast AF system support
- Circular aperture diaphragm and durable metal mount
- Suitable for a wide variety of occasions with focal length of 40mm (35mm equivalent)
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Product Description
Manufacturer's Description
The LUMIX G 20mm / F1.7 ASPH., is a compact interchangeable lens based on the Micro Four Thirds System standard. It features a bright maximum aperture of f1.7 allowing a shallow depth of field to separate your subject from the background for even more impressive photographs.
Comprising of 7 elements in 5 groups, the lens system also employs 2 aspherical lenses to minimize both distortion and chromatic aberrations, achieving a high corner to corner resolution.
The versatile focal length of 40mm (35mm camera equivalent) is suitable for a wide variety of occasions from daily snapshots including sceneries like sunsets and dimly lit indoor shots to the deliberately creative shots taking advantage of its beautiful depth of field capability.
When mounted on LUMIX G Micro System Cameras, the LUMIX G 20mm / F1.7 ASPH. allows use of the advanced contrast AF system which includes a Face Recognition function, for more convenient and enjoyable shooting.
Seven blades give the aperture a rounded shape that produces an attractively smooth effect in out-of-focus areas when shooting at larger aperture settings. The lens also features a durable metal mount and uses multi-coated lens elements that minimize ghosting and flare to further enhance its optical performance.
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Customer Reviews
Most Helpful Customer Reviews
12 of 12 people found the following review helpful
The best lens for the Micro Four Thirds System. Fast, sharp, small, light, fast autofocus. The best kit is with a Panasonic GF1 o GF2: it's like having a smaller Leica with a normal lens.
41 of 43 people found the following review helpful
Amazon Verified Purchase
This lens has been lauded in many reviews - it's probably *the* must-have lens for M43 camera users.
I use it on my Olympus PEN E-P1 and my wife's Panasonic G2; on either camera it transforms the overall size making them both look and feel much smaller. Focus speed is OK, though I must say it seems a bit slower to focus on the G2 than the PEN for some reason - after the last firmware upgrade the PEN has got much snappier in this respect.
In use the 20mm gives a 40mm equivalent on a traditional film SLR (or Full frame DSLR) which isn't quite standard lens length and the extra field of view can lead to distortions if used without care on portrait shots though it's not that wide for landscapes either! Having said that having a prime lens makes you think more about your shots and you'll get picture you just wouldn't with a lazy old zoom.
One of the top benefits of this lens is the super wide (for M43!) 1.7 aperture. This Makes it good for low light photography and in some conditions enables you to get a nice blurry background. This is especially nice on the PEN as it has in camera stabilisation, there is no OIS on the Lumix 20mm. Chromatic aberrations isn't an issue on the PEN and the G2 removes any it finds it automatically, so zoom users that get annoyed with purple fringing will be happy too.
So, this is a compact lens that is pin-sharp and great for low-light pics and makes some M43 cameras almost pocketable. Five stars without question.
I use it on my Olympus PEN E-P1 and my wife's Panasonic G2; on either camera it transforms the overall size making them both look and feel much smaller. Focus speed is OK, though I must say it seems a bit slower to focus on the G2 than the PEN for some reason - after the last firmware upgrade the PEN has got much snappier in this respect.
In use the 20mm gives a 40mm equivalent on a traditional film SLR (or Full frame DSLR) which isn't quite standard lens length and the extra field of view can lead to distortions if used without care on portrait shots though it's not that wide for landscapes either! Having said that having a prime lens makes you think more about your shots and you'll get picture you just wouldn't with a lazy old zoom.
One of the top benefits of this lens is the super wide (for M43!) 1.7 aperture. This Makes it good for low light photography and in some conditions enables you to get a nice blurry background. This is especially nice on the PEN as it has in camera stabilisation, there is no OIS on the Lumix 20mm. Chromatic aberrations isn't an issue on the PEN and the G2 removes any it finds it automatically, so zoom users that get annoyed with purple fringing will be happy too.
So, this is a compact lens that is pin-sharp and great for low-light pics and makes some M43 cameras almost pocketable. Five stars without question.
25 of 26 people found the following review helpful
I'm a professional photographer but when not working I just use a trusty 1st gen. Olympus EP-1 with the Olympus 17mm pancake lens and VF-1 Viewfinder - it's great for informal snapshots and holidays - when you really don't want to be burdened by photo gear - or feel every holiday is a busman's holiday! I was very happy with this combo, until I tried this Panasonic 20mm f/1.7.... What can I say about this lens which has not already been said? I find it so sharp, the f/1.7 aperture so useful and its compact form so convenient that it has transformed my tiny Olympus camera system from something good into something very very good!
You can use this lens in low light at f/1.7 or use that big aperture to isolate your subject from its background to great affect. Oh and with the Olympus Pen cameras you get Vibration Reduction built into the the camera body too, so you now have a super bright f/1.7 lens with Vibration reduction - how is that for low light snaps? Amazing!
What's more, if you have the optical viewfinder (VF-1) which came as part of the original Olympus kit and is apparently matched to the 17mm lens, you may have found it showed much less than the 17mm lens was actually capturing - i.e. the lens was wider than the viewfinder. Stick this 20mm on your EP-1 (or any other m4/3rds camera) and the view out with the VF-1 is actually more accurate! It still has the usual parallax error on close subjects of course but it is a much better match for this lens.
Downsides? It costs a fair bit compared to DSLR lenses of the same sort - e.g. the Nikon 35mm f/1.8 for DX or 50mm f/1.8 for FX and it doesn't come with a lens hood. Some might say the 40mm equivalent focal length is neither one thing nor another - not wide not zoomy! Really though all that it does it force you to be creative with your compositions, and surely that is the sort of photography these little micro 4/3rds cameras are designed for?
Its a fit and forget lens for me... I see my Olympus + this lens + the VF-1 Viewfinder as a superb compact digital camera system.
You can use this lens in low light at f/1.7 or use that big aperture to isolate your subject from its background to great affect. Oh and with the Olympus Pen cameras you get Vibration Reduction built into the the camera body too, so you now have a super bright f/1.7 lens with Vibration reduction - how is that for low light snaps? Amazing!
What's more, if you have the optical viewfinder (VF-1) which came as part of the original Olympus kit and is apparently matched to the 17mm lens, you may have found it showed much less than the 17mm lens was actually capturing - i.e. the lens was wider than the viewfinder. Stick this 20mm on your EP-1 (or any other m4/3rds camera) and the view out with the VF-1 is actually more accurate! It still has the usual parallax error on close subjects of course but it is a much better match for this lens.
Downsides? It costs a fair bit compared to DSLR lenses of the same sort - e.g. the Nikon 35mm f/1.8 for DX or 50mm f/1.8 for FX and it doesn't come with a lens hood. Some might say the 40mm equivalent focal length is neither one thing nor another - not wide not zoomy! Really though all that it does it force you to be creative with your compositions, and surely that is the sort of photography these little micro 4/3rds cameras are designed for?
Its a fit and forget lens for me... I see my Olympus + this lens + the VF-1 Viewfinder as a superb compact digital camera system.
Most Recent Customer Reviews
I only wish Sony could make a lens this small AND fast for the...
I only wish Sony could make a lens this small AND fast for the excellent NEX system! Is it possible to fit via an adapter to an NEX-5n?
Published 10 days ago by Brian Hrodgar
What a lens! Impressed
I bought the 20 f/1.7 as a gamble to see how good the prime is. Well it is great to be honest and you wouldn't worry too much about the price tag. Read more
Published 20 days ago by Jay Menon
I wasn't a believer
When I first read about this lens I wondered how it could be as good as it is reviewed. A recent trip to the US uncovered a few deals but the reality is that no-one had it in... Read more
Published 25 days ago by David Taylor
Great Lens
All the good things written about this lens are true.
I also noted the noise the aperture ring makes is a bit loud but that is only an issue for video
Highly recommend
I also noted the noise the aperture ring makes is a bit loud but that is only an issue for video
Highly recommend
Published 27 days ago by CraigS
Great ! Should be on your short list
This used to be THE lens to get to accompany a micro four thirds camera body. It is better than the Olympus 17mm 'pancake' lens and sharper and smaller than the micro four thirds... Read more
Published 29 days ago by Dr. M. Cinnirella
Best lens for the Panasonic G2
I have a G2 and since I brought this lens I haven't fitted either of the other two lens that I have. This 20mm is simply the best. Read more
Published 1 month ago by Hermes
Veryy Good Lens
This is alovely little lens for the M. 4/3 system. Probably as sharp as you ca get at this sensor size. recommended
Published 2 months ago by mbshrekito
Great Lens but focus a little slow and noisy
This has pretty much been a permanant attachment to my G3 camera as it has a great focal length. The lens is very sharp as everyone else has commented and I love having the fast... Read more
Published 3 months ago by Stuart Duncan
Totally fantasticlLittle gem of a lens!
Just purchased this lens yesterday and kicking myself that I didn't rush out and buy it during the cashback promotion period which just ended last weekend! Read more
Published 4 months ago by Steve W, Manchester UK
quality
I bought this lense as a gf-1 kit a few years ago and I am always impressed with the quality it gives. Read more
Published 4 months ago by R. Gibson
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