The Panasonic Lumix G X Vario 35-100mm F2.8 ASPH. ($1,499.99 direct)($741.67 at Amazon UK) is pro-level zoom for Micro Four Thirds cameras. It covers a 70-200mm field of view in terms of full-frame 35mm photography, equaling the classic range that is the go-to lens for many a wedding and event photographer. Panasonic's take on the design isn't perfect—the edges could be a bit sharper—but it's optically stabilized and compact. It's pricey, but if you're a Micro Four Thirds shooter and are looking for a lens of this type, it's the best option on the market at this time. Olympus plans to release a 40-150mm f/2.8 zoom as part of its line of pro-grade lenses late next year, but based on the prototype it's a much larger lens, and no details have been revealed about pricing. The lens measures just 3.9 by 2.7 inches (HD), weighs 12.7 ounces, and uses the same 58mm filters as its wide-angle sibling, the Lumix G X Vario 12-35mm F2.8 ASPH.($741.67 at Amazon UK). It's an internal zoom design...

The Panasonic Lumix G X Vario 35-100mm F2.8 ASPH. is a wide-aperture telephoto zoom for Micro Four Thirds cameras, but its performance suffers at the edges of the frame.

Optical stabilization; Maximum f/2.8 aperture; Useful zoom range; Compact; Internal zoom design; No noticeable distortion; Protected from dust and moisture

Some edge softness; Pricey

Tack sharp, fast, constant aperture, constant physical length throughout the zoom range, very small for its specs, effective in-lens IS, even with an Oly OM-10. This is an amazing lens.

I own the DSLR version of this lens, the 70-200 2.8. While this lens isn't on the same level, it's an amazing lens for any micro 4/3 telephoto needs. It's sharp and light weight. Autofocus speed is fine, though with this lens and my m43 cameras, it's not fast enough for sports and fast action.

This is just amazing! The size is very similar to a can of soda (without the lens hood attached, still very similar if reversed for carrying around) and has a 70-200mm equivalent field of view. It works really well and is very responsive.

Sharp edge to edge at any focal length, very fast autofocus, excellent contrast and colors, small and light-weight. The lens has internal focus and zoom (not change its size). I use the lens on Olympus OMD E-M1 and the results is real profesional.

ligth-weight; very sharp; fast autofocus; excellent contrast & colors; OIS,etc

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The Panasonic Lumix G X Vario 35-100mm F2.8 ASPH. is a wide-aperture telephoto zoom for Micro Four Thirds cameras, but its performance suffers at the edges of the frame.

Optical stabilization; Maximum f/2.8 aperture; Useful zoom range; Compact; Internal zoom design; No noticeable distortion.

Some edge softness.

I have been testing this lens for a few days on my Lumix G5 and have found it doesn't take badly shot photos or videos and magically transform them into masterpieces!, but when you take very good photos and video they looks amazing!

Micro-Four-Thirds (MFT) may offer the most extensive mirrorless lens system but even so it has one significant shortcoming - professional-grade MFT tele-zoom lenses are rare. Very rare. Essentially, ambitious users have the choice between ... well ...

Very good material, but the lens is better... Is very clear the photos are really amazing. It was a very good quality/price buy.

Excellent quality, both optically and build. Small fraction of the size and weight of the equivalent for a full frame camera. There is no current competative product at this quality, size & weight.