Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 ASPH. POWER O.I.S. Lens

Model: H-RS100400

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Weight 2.17 lb (985 g)
Dimensions (DxL) Approx. 3.27 x 6.75" (83 x 171.5 mm)
Filter Thread Front: 72 mm


Format Compatibility Micro Four Thirds
Angle of View 12° - 3.1°
Minimum Focus Distance 4.27' (1.3 m)
Magnification 0.25x
Elements/Groups 20/13
Diaphragm Blades 9, Rounded
Focal Length 100 - 400mm Comparable 35mm Focal Length: 200 - 800 mm
Aperture Maximum: f/4 - 6.3Minimum: f/22
Camera Mount Type Micro Four Thirds

Packaging Info

Package Weight 3.55 lb
Box Dimensions (LxWxH) 12.3 x 5.9 x 5.7"


Tripod Collar Yes Fixed - rotating
Autofocus Yes
Image Stabilization Yes
Expert Reviews
Imaging resource.34355410
1 October 2016

Best lens I ever bought in my life. No more comments! Note: the "stiff" zooming is caused by the customer's mistake: the lens is supplied with its zoom-lock-ring put into the "lock"-position. Please, unlock, turning it to the left (anti-clockwise).

User Reviews
B h photo.32817553
3 weeks ago

This lens, after having used it on a wildlife shooting trip to South Africa and Botswana for two months on a Panasonic GH 4 body for video and stills, was disappointing my expectations and sometimes even frustrating.

B h photo.32817553
3 weeks ago

Optically this lens exceeds my expectations; which is why I give it 5 tars. However some of the design features I question. 1. The lock and unlock switch really doesn't work that well and it's confusing when your locked or unlocked. 2. Has anyone used this lens in winter?

B h photo.32817553
31 October 2016

I photograph birds primarily. I can't afford an 800mm prime. This lens on my micro 4/3rds camera gets me close. I have been using it for a week and have had no problems.

B h photo.32817553
22 September 2016

Three years ago I decided to switch from a Canon DSLR with an APS-C sensor body to an Olympus OM-D E-M1 micro 4/3 body. My favorite subjects were wildlife using a Canon 600mm, f4 lens.

B h photo.32817553
19 September 2016

I felt that this was a bit of a risky purchase, based on some early reviews regarding zoom stiffness and of course the usual M43 skeptics. This lens was meant as an upgrade for the Panasonic 100-300, which has been a serviceable lens for the past couple of years, used with OM-D 5 and now a 5 MkII.

B h photo.32817553
4 September 2016

I bought this lens to complete my kit and use with my GX8; I had previously tried some of the Panasonic 100-300 options, but found them lackluster. So I decided to give this a whirl, and am I glad I did!I admit, when I first received it, I wasn't particularly impressed.

B h photo.32817553
31 August 2016

I have been very pleased with this lens. It is amazingly compact for it's range and reach, and very light as well. I like the cleverly designed tripod foot and controls. Optically it is quite good.It tested very well for me.

B h photo.32817553
26 August 2016

Fantastic image quality at all f stops including wide open. Perfectly balanced for mtf bodies, well build, and build to go were you go, hot cold, rain of snow. I have problem taking this lens out in any weather.

B h photo.32817553
12 August 2016

One star because I found the lens to be unusable...the zoom action was way too stiff. Basically, youset the focal length and you are stuck with that setting. I have other zooms, the Leica Lumix 12-35, the Leica lumix 35-100, the pany 45-200 and the pany 100-300.

B h photo.32817553
3 August 2016

Optically, this lens surprised me and it is better than I expected it would be. At 400mm wide open, I don't really notice much difference, center to edge, on a GX8 shooting at distant mountain scenes.

Product Highlights
  • Micro Four Thirds System
  • 200-800mm (35mm Equivalent)
  • Aperture Range: f/4 to f/22
  • 1 Aspherical ED, 1 UED and 2 ED Elements
  • High-Speed 240 fps AF, Focus Limiter
  • POWER O.I.S., Dual I.S. Compatibility
  • Built-In Rotating Tripod Collar & Hood
  • Weather-Resistant Construction
  • Rounded Nine-Blade Diaphragm
Average Expert Score
Average User Score
In The Box
  • Panasonic Leica DG Vario-Elmar 100-400mm f/4-6.3 ASPH. POWER O.I.S. Lens
  • Front and Rear Lens Caps
  • Lens Storage Bag
  • Limited 1-Year Warranty
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