This is a 70-200mm equivlent lens, stuffed with the best optical technology Panasonic has to offer: LUMIX G X 35-100mm F2.8: Key Features Lens Construction: 18 elements in 13 groups (2 ED lenses , 1 UED lens) Nano Surface Coating: Yes Mount: Micro Four Thirds mount Optical Image Stabilizer: Yes (POWER O.I.S.) Focal Length: f=35-100mm (35mm camera equivalent 70-200mm) Aperture Type: 7 diaphragm blades / Circular aperture diaphragm Maximum Aperture: F2.8 Minimum Aperture: F22 Closest Focusing Distance: 0.85m / 2.8ft Maximum magnification: Approx. 0.1x / 0.2x (35mm camera equivalent) Diagonal Angle of View: 34°(Wide) to 12°(TELE) Filter Size: 58mm / 2.3in Max. Diameter: Approx 67.4mm / 2.7in Overall Length: Approx. 99.9mm / 3.9in (from the tip of the lens to the base side of the lens mount) Weight: Approx. 360g / 12.7oz (excluding lens cap, lens rear cap and lens hood) Standard Accessories: Lens front cap, Lens hood, Lens rear cap and lens storage bag)
Overview

Description by Panasonic:

Specifications
Initial Price: 
$1300
Release Date: 
09/2012

Panasonic Lumix G X Vario 35-100mm f/2.8 ASPH POWER O.I.S Lens review by Ivo Freriks at Camera Stuff Review: Given the optical performances and the high quality of construction, this lens is certainly not expensive.

The Lens was tested with  Olympus E-M5 and Panasonic GH3 body. 

"The Panasonic 35-100 mm delivers sharp images across all focal lengths from full aperture to aperture 8. Above that, the resolution decreases as a result of diffraction. This is the best micro-43 zoom lens we have reviewed to date, with the Panasonic 12-35 mm yielding more or less equivalent results (but at a different focal length range). In the graph with Imatest values at the right below, you can see how beautifully high and constant the resolution is. The images are measurably sharper in the center, with the maximum being located at aperture 4 to 5.6. Nevertheless, with the naked eye, the difference in resolution between the corners and the center is not visible." . . . read more

Panasonic Lumix G X Vario 35-100mm f/2.8 ASPH lens video review by David Thorpe: Center sharpness is excellent across the frame, and if you stop down a bit-or two, it will be sharp across the 35-100mm range, corner to corner.

The Panasonic Lumix GX Vario 35-100mm f2.8 ASPH Zoom Lens Review

The lens was tested by David on a GH3 body:

I find distortion in unnoticeable right through the range, and Chromatic Aberration is minimal-its pretty much not there.
To Sum up, this is a valuable addition to the micro 4/3 photographer's armory, and for many of those, this lens paired to the 12-35mm will be all the glass that they would ever need. You'll have the equivalent of a 24mm wide angle to 200mm tele, all at a constant f/2.8 in just two small optics. Add a weather sealed body like the Olympus OM-D, or the Panasonic GH3, and the result is a very capable and versatile outfit using just 3 items of gear. In so far as it matters, its a really good looker. Focusing speed is lightning quick, especially with the firmware upgraded to the current 1.1 version. It has . . . read more

Panasonic GH3 review and user experience multi-part review at Sound Image Plus: This thing is different, it is the future, it is a DSLM (and i love it). Also: Nikon D600 & D800 for sale.

"Next two days are supposed to have some sunshine so I'll hopefully get some more decent opportunities to run the outfit through its paces. However this camera already ticks more boxes for me than anything else I've ever bought, so I am expecting great things. Its pretty obvious that there has been some serious input into this by photographers, something that hasn't always been in evidence with some previous Panasonic m4/3 cameras. Those dark days of the

. . . read more

Panasonic LUMIX G X VARIO 35-100mm F2.8 Review at Frugal Film Makers: Fast and sharp, coupled with the 12-35mm it is twice nirvana.

"I have to say it has been worth the wait.  This lens will get a lot of use by me.  Panasonic pulled out all the stops on this one as well.  Is as good as we thought it might be?  Yes!  What more could we ask for?  Some are saying the price is to high, but this is a “luxury” lens like the one from the other guys.  Their’s is much bigger, heavier and expensive.  What we get for this expense is a lens that bring MicroFourThirds into the big leagues with it professionalism with a fast tele zoom.

When Panasonic showed the prototype of this lens they also showed a 12-35mm F2.8. O.I.S.  This new wonder tele zoom . . . read more

Lumix G X Vario 35-100mm f/2.8 ASPH lens review by Jordan Steele at Admiring Light: This lens finally brings a top tier telephoto zoom to the Micro 4/3 system, and I can definitely recommend this lens for the serious Micro 4/3 shooter. A great lens.

As micro 4/3 zoom lenses go, the 35-100mm f/2.8 is among the sharpest,

The Lens was tested with Panasonic GX1 and Olympus E-M5 bodies.

"The cons list above may seem a bit nitpicky to some. Especially the last point, so let me explain. The image quality of this lens is outstanding, and the lens is a worthy addition to the Micro 4/3 lineup. However, compared with the newest 70-200mm lenses from Canon and Nikon, it’s not quite going to match those stellar optics. Instead, I’d say it’s on the level of something like the original Canon 70-200mm f/2.8L IS. So, very, very good, but not flawless. Considering it’s $1,000 less than those new Canon and Nikon lenses, though, I can forgive this. Still, it’s a pricey lens at $1,499, and will really only cater to those who know they need an f/2.8 telephoto zoom in this range. . . . read more

Panasonic 35-100 f/2.8 X OIS lens First Impression at Lens Rentals: Excellent wide, 'meh' tele end.

Maybe they set the bar too high, even though they used some of the best m43 cameras around, the E-M5 and the G5 to aid in the evaluation of this new 70-200mm equivalent lens:

"Well, it didn’t quite meet my expectations, at least not at the 100mm end which is where my main interest was. But I’d set the bar pretty high. . . . read more

Panasonic Lumix G X Vario 35-100mm f/2.8 Asph OIS Lens Review at EphotoZine

Excerpt:

"Distortion is well controlled at either end of the zoom range with only 0.58% barrel and 0.31% pincushion distortion detected by Imatest at 35mm and 100mm respectively. The distortion pattern is uniform across the frame, so any . . . read more

Panasonic LUMIX G X VARIO 35-100mm F2.8 Review at the Photography Blog

The price may be bringing tears to the eyes, but the performance is really up there with the good 70-200mm f2.8 group:

"Optically the lens is a great performer. At all focal lengths, wide open at f/2.8 the center sharpness is perfectly acceptable, but for edge sharpness it's best to stop down by two f-stops for optimum results. Chromatic aberrations are only noticeable . . . read more

Panasonic Lumix G X 35-100mm F2.8

f2.8, nano coating, stabilizer, metal construction, UED and ED elements, yup, that's the same recipe as the current top of the line 70-200mm lenses on offer at the top of the competition. Available from November.

Panasonic Press Release . . . read more

Panasonic 12-35mm and 35-100mm Lenses found @ CES by PBlog

"Panasonic have unveiled two new concept lenses, the 12-35mm and 35-100mm, at CES 2012.

Being shown under glass, the Lumix 12-35mm (24-70mm equivalent) and 35-100mm (70-200mm equivalent) are both Power O.I.S lenses with maximum apertures of f/2.8, and they accept 58mm filters.

Other than a prominent sign stating “Concept Lens” behind each one, there’s no other information on if or when they will see the light of day." . . . read more

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