Wednesday, September 16, 2015

Lumix DMC-GX8 - Dual I.S.

I.S. (Image Stabilisation) in a camera or lens can permit the use of shutter speed 2 to 5 stops SLOWER, but still result in SHARP PICTURES.

When I was starting in photography many years ago, I was told...

“The rule of thumb to determine the slowest shutter speed possible for hand-holding without noticeable blur due to camera shake is to take the reciprocal of the 35 mm equivalent focal length of the lens, also known as the "1/mm rule". For example, at a focal length of 125 mm on a 35 mm camera, vibration or camera shake could affect sharpness if the shutter speed was slower than 1/125 second.”  - Wikipedia

In the good old film days, we stick to this rule; for example, with a 300mm telephoto, we will not use a speed slower than 1/250 to get sharp result. Just to make sure, we also shoot at 1/500.

What happen if there is only enough light to allow F4 (max aperture) and 1/60 for the ISO 400 film you are using?  No, you have no tripod and monopod either, what then?

Fast forward to present...


To understand the concept and the working of IS, I suggest you read this excellent write up.

The mechanism of an image stabilisation can be found in either the lens or built into the camera.

Panasonic however, gone a step further and includes their IS in most their lenses and a few cameras! As you can see from the picture above, their POWER O.I.S. in the lens can be switch on and off even. Their earlier version was known as MEGA O.I.S.

Many photographers are excited when they discover the GX8 have it's own stabiliser build in, when the newly launch camera is use with a POWER O.I.S. lens; you effectively enjoy DUAL IS technology!

I believe this is the FIRST TIME any manufacturer offer this SIX AXIS (4 in camera and two from lens) stabilisation!

At the moment, the following SIX Lumix lenses are able to work with the GX8 to deliver dual IS.

- Lumix G 14-140mm f/3.5-5.6 Power OIS
- Lumix G 14-42mm f/3.5-5.6 II ASPH Mega OIS
- Lumix G macro 30mm f/2.8 ASPH Mega OIS
- Lumix G  X VARIO 12-35mm f/2.8 ASPH Power OIS
- Lumix G X VARIO 35-100mm f/2.8 ASPH Power OIS
- Lumix G Leica DG Nocticron 42.5mm f/1.2 Power OIS

According to Panasonic if all goes to plan, 80% of Panasonic's lenses will be compatible with this system by the end of 2015.

When a compatible Lumis lens is mounted on the GX8, you will see the "DUAL shaking hand" icon on the rear display.

However, if a none IS lens is used, the GX8 will just activate the built in stabiliser in the camera body and display only the "BODY shaking hand" icon.

In the case of those Lumix lenses that possess IS but NOT compatible (at the moment), the camera is smart enough to switch off the in body IS and use only the OIS in the lens.

When that happen, you will see the "LENS shaking hand" icon on the rear screen.

To test the effectiveness of the DUAL I.S., I shot some night scene around Wellington Queen's Wharf.

All the shots were hand held, the GX8 was fitted with the Lumix G  X VARIO 12-35mm f/2.8 ASPH Power OIS lens.

All the shots above were exposed at ISO 800, maximum aperture of F2.8 and 1/8 second. The last one is a 100% from the seascape, I think that is bloody awesome for a ONE EIGHTH SECOND hand held shot!  The DUAL I.S. rock! 

At 1/25 it was so rock steady, who needs a tripod?  ;)

With thanks ** Lumix DMC-GX8 and Lumix 12-35 F2.8 courtesy of Panasonic New Zealand. 


LUMIX DMC-GX8 - Last Words..

1 comment:

Anonymous said...

Have you tried shooting at 1/4 sec.?
I've been getting a 95%+ success rate at 1/4 sec. shooting with the Nocticron on the GX8 with Dual IBS. I'm sure you can do at least as well with the 12-35.