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.

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 ...

Superb lens, images are sharp, nice contrast and colour. My favourite Canon lens was the 70-200 f2.8 L IS; this lens is a great match at equivalent focal length. Have printed images from lens at A3 - no issues that I can detect. Nice and light and complete zoom is within the barrel. Terrific lens.

Consistent Output; Durable; Lightweight; Quick Focus; Sharp Focus; Weather sealed

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.

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.

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

Panasonic announced its Lumix G X VARIO 35-100mm f/2.8 / POWER O.I.S. lens in mid-September 2012 as a 'companion' to the Lumix G X Vario 12-35mm f/2.8 ASPH lens, which was released earlier in the year. Like the 12-35mm lens, it is splash- and dust-resistant.

Handling and features Performance Verdict Specification Covering angles of view equivalent to the popular 70-200mm range on a 35mm camera, this lens boasts a constant fast f/2.8 maximum aperture, internal focusing and zoom, optical stabilisation and a nano surface lens coating to help suppress the...

Excellent sharpness; Low distortion; Weather sealed build; Fast focusing; Constant f/2.8 aperture; Effective image stabilisation; Compact size for a telephoto zoom

Sharpness towards the edges of the frame could be better (although perfectly adequate for most purposes

The LUMIX G VARIO 35-100mm F2.8 is the best telephoto zoom for the Micro Four Thirds system. It offers a classic 35mm focal range with a fast maximum aperture in a relatively tiny and lightweight package, backed-up by excellent image quality throughout the focal range.Also on offer are the best...

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!