Panasonic Lumix G 20mm F/1.7 ASPH

Written by Digital Photo Guru on May 10th, 2010

Panasonic Lumix G 20mm F/1.7 ASPH


Last updated (09 May’10):
- Review by SteveHuffPhoto.com

Panasonic Lumix G 20mm F/1.7 ASPH is a compact and lightweight “pancake” lens announced September 2009 as the companion of the Lumix DMC-GF1 Micro Four Thirds camera (also can be used with Olympus PEN systems). The lens features 20mm ‘perfect normal’ fixed focal length; fast F1.7 maximum aperture, ‘Focus by wire’ manual focus system, with Ultra-thin, lightweight design. The lens measures 63mm diameter x 25.5mm length (2.5 x 1.0 in) and weighs approx. 100g (3.5 oz)

Panasonic-Lumix-G-20mm-F1.7-ASPH
Overall Rating: 4.5 out of 5 stars | Latest Price Info

Expert Reviews

Panasonic Lumix G 20mm F1.7 ASPH Reviews

SLRGear reviews the Panasonic Lumix G 20mm F1.7 ASPH and writes;
“With excellent results for sharpness, resistance to chromatic aberration and essentially no distortion, Panasonic has done well with the 20mm ƒ/1.7, and we’ve been having fun shooting with it. For a really compact shooting package, the lens is a worthwhile investment.”
Rating: 4.5 out of 5 stars

SteveHuffPhoto.com reviews the Panasonic Lumix G 20mm F1.7 ASPH and writes;
“The Panasonic 20 1.7 is a lens I can easily recommend. I do not see anyone not liking it. This may be old news as this lens has been out for a while and there are probably a million reviews out there for it already. I just wanted to throw my take in to the mix in a “real world” kind of way. .”
Rating: N/A

Photoreview.com.au reviews the Panasonic Lumix G 20mm F1.7 ASPH and writes;
“Imatest showed it to be capable of high resolution through its aperture range, with the highest performance being between f/3.2 and f/7.1…Edge sharpness was generally very good and lateral chromatic aberration was negligible across all aperture settings”
Rating: N/A

Photozone.de reviews the Panasonic Lumix G 20mm F1.7 ASPH and writes;
“The build quality of lens is excellent and we’d certainly like to see more of this in future lenses. The focus-by-wire approach (manual focusing) may be odd at first but you should be able to used to it in no time. The AF performance is very good. “
Rating: N/A

User Opinions

Panasonic Lumix G 20mm F1.7 ASPH User Reviews

Great Lens, | Rating: 5 out of 5 stars
“The 20mm pancake lens is great for use on the GF1. It makes the camera into a near perfect street shooter, and it’s also good for parties or social gatherings where your inconspicuous gear profile will allow you to snap a lot of candid shots. The f/1.7 allows for shooting in low light and produces some beautifully shallow depth of field. Images are are extremely sharp, and I’ve had no problems with flare after several weeks of usage. I’m perfectly happy with it as my only prime. “ – by RS

Very fast, compact lens ever used | Rating: 4 out of 5 stars
“This is a very fast, with pretty big aperture which you can still shot fast at night. The build quality is good too. Like this lens very much. “ – by L. Ma “flyingpalm”

So small, and very sharp!, | Rating: 5 out of 5 stars
“I bought the 20 1.7 to go with my Panasonic GF1 and GH1 cameras, and this lens has not disappointed! It is so small and light, and the image quality is fantastic! I mostly use it with my GF1 as that combo is my go everywhere camera, but it also does visit my GH1 at times. The lens is sharp and contrasty, and the AF is quite fast even given that the lens does have to move some to focus. This lens has become a classic in the micro 4/3 world!” – by A. Chng

best lens for m4/3 | Rating: 5 out of 5 stars
“i’m impressed with this lens and have read all the good things about it, not yet a negative. get this lens if you have a m4/3 system. or rather you owed it to yourself to get this lens if you have e-p1, e-p2 or gf1. this lens is a perfect pairing with my gf1 for everyday chores and travel with me anywhere. “ – by A. Chng

Optically Excellent. Not that great on Olympus!, | Rating: 4 out of 5 stars
“This lens is excellent optically. The fast 1.7 aperture is just the best you can get right now for micro 4/3 systems. I am hoping more fast lenses arrive but in the mean time this is the one to own. The lens is not as ‘pancake’ as everyone says. To top that off, the lens cap is the thickest cap I have ever seen. I really wish they had a cap similar to the Olympus kit lens. The Olympus kit lens has a very thin cap. Because of this, the lens with cap is just not that much smaller than the original kit lens. Manual focus works fine, but for me the feel is too slow. See the manual focus is controlled electronically. First you have to adjust the mode on the camera, then you turn the focus ring, then you wait for the camera to use the focus motors to set the desired focus. Keep in mind that this is a fixed lens, meaning it can’t zoom. The reason to buy this lens is to be able to take pictures indoors without using a flash and to have more creative control over the background blur. “ – by John D. Biggs “tech guru”

Great image quality from a very small lens | Rating: 5 out of 5 stars
“I bought the Panasonic G1 with the kit lens and then started reading all the great reviews about this lens. I love how small it is. It adds almost no weight to the G1 so you can walk around with It all day without your neck getting sore. I love my Canon 50 F1.4 lens but the view is a little narrow on my Canon 40d. This lens, on the G1, is is the perfect focal length for me. The G1 has a crop factor of 2 so this lens becomes a 40. Just a little wider than a “normal” lens. The resolution remains high at almost all apertures. 1.7 is pretty sharp so you can use the entire aperture range and still get good quality. “ – by David A. Morehead

The best lens for Olympus Pen E-PL1 | Rating: 5 out of 5 stars
“I’m the usual compact-camera-user-wanting-better-low-light-pictures (and faster focus…)
And I’m not interesting in a relatively huge, heavy DSLR. I got this and the E-PL1 and can’t believe how good this combination is. Haven’t opened the manual yet, but in less than 5 minutes I was taking pictures that are impossible with any compact (other than maybe the (now kinda old) Panasonic LX3). The camera is very good in its own right, but THIS LENS is the primary reason. “
– by Eric “EY2″

Amazing | Rating: 5 out of 5 stars
“With this little Panasonic 20 1.7 lens you have a high quality lens . You can do low light, shallow depth of field, and get great results. Amazing… “ – by A Kid’s Review

More user opinions | Write your opinion

Features & Specifications

Panasonic Lumix G 20mm F1.7 ASPH Features & Specifications

Panasonic unveiled a new pancake interchangeable lens called the LUMIX G 20mm / F1.7 ASPH. (35mm camera equivalent: 40mm) as a new member of the LUMIX G Micro System. The new LUMIX G 20mm / F1.7 ASPH. Features a dramatic compactness and light weight despite its F1.7 brightness allowing a beautiful soft focus for photos to be even more impressive.

Comprising of seven lenses in 5 groups, the new lens system uses two aspherical lenses most effectively to minimize both distortion and chromatic aberrations, achieving super high resolution corner to corner. The versatile 20mm of focal distance (Equivalent to 40mm on a 35mm film camera) is suitable for 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 soft focus. When mounted on the 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, more 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 new LUMIX G 20mm / F1.7 ASPH. lens also features a highly reliable metal mount, and uses multi-coated lens elements that minimize ghosts and flare to further enhance its optical performance.

Specifications

- LUMIX G 20mm / F1.7 ASPH. (35mm camera equivalent: 40mm)
- Lens Construction 7 elements in 5 groups (2 Aspherical lenses)
- Mount Micro Four Thirds mount
- Optical Image Stabilizer No
- Focal Length f=20mm (35mm camera equivalent 40mm)
- Aperture Type 7 diaphragm blades / Circular aperture diaphragm
- Aperture F1.7
- Minimum Aperture F16
- Closest Focusing Distance 0.2m / 0.66ft
- Maximum magnification Approx. 0.13x / 0.25x (35mm camera equivalent)
- Diagonal Angle of View 57°
- Filter Size φ46mm / 1.81 in
- Max. Diameter φ63mm / 2.48 in
- Overall Length Approx. 25.5mm / 1.00 in (from the tip of the lens to the base side of the lens mount)
- Weight Approx. 100g / 3.53oz
- Standard Accessories Lens Cap, Lens Rear Cap, Lens Storage Bag

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