May 4th, 2012

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Pushing the flash sync of the Olympus OM-D E-M5 Micro Four Thirds camera

Friday, May 4th, 2012

The new Olympus OM-D E-M5 Micro Four Thirds camera is great for lots of reasons, but one of them is that it has easily the BEST flash capabilities of ANY Micro Four Thirds camera, or for that matter, ANY mirrorless camera currently available.

Unlike the Panasonic cameras prior to the GH-3, it has remote TTL flash capability, much better control over manual flash output, the TTL flash metering appears to work perfectly with legacy lenses, you can over-ride the flash sync speed* and the flash sync with new flashes is a lovely 1/250th second.

The Fuji X-Pro1 with its lovely sensor only has flash sync of 1/180th sec, no remote TTL flash system as I understand it, and has major trouble with autofocus or manual focus in low light conditions where you would be most needing flash, and of course, no image stabilisation on any of the only 3 lenses available.

The Sony NEX cameras persist with Sony/Minolta proprietary hot shoe which is not compatible with every other manual hotshoe ever made, and flash sync only 1/160th sec.

The Samsung NX cameras have flash sync of 1/180th second, but no remote TTL flash that I am aware of.

Most of the EM-5 features also exist on the current Olympus PEN cameras except the nice fast flash sync of 1/250th second.

Another benefit of the identical Micro Four Thirds and Four Thirds hotshoe pin layout is that they can both use the Canon off-camera TTL cord as this is TTL pin compatible for use as a off-camera TTL cord to an OLympus flash unit – fantastic if you also happen to use Canon gear as I do!

But being who I am, I like to see what happens when I push the system, because sometimes you want full output flash at faster shutter speeds (not just Super FP or HSS flash which saps your flash output dramatically as you increase shutter speed!).

On the Panasonic GH-1 there was no way I could push it like I have always been able to do on my Olympus dSLRs, and now with the E-M5 – by using a manual flash only adapter in the hotshoe which then connects to your flash in non-TTL mode, you can trick the camera software to allow any shutter speed not just a shutter speed up to the “flash sync”.

The downside, is that as you increase the shutter speed, you get increasing vignetting along the top of the frame from the flash exposure due to the mechanical focal plane shutter obscuring the sensor during the flash exposure.

However, if you are shooting a portrait outdoors in the sun with camera rotated into vertical portrait mode, and you position your subject to the opposite side of where the vignetting is occuring (and preferably have no close objects which will only be partly lit by the flash, as this would betray our little trick and spoil the photo), you can succesfully use this technique very nicely indeed to get results that are otherwise not possible.

So here are the test shots of a wall to demonstrate the increasing vignetting when using an Olympus FL-36R flash:

1/250th sec
1/250th sec (above)

1/320th sec
1/320th sec

1/400th sec
1/400th sec

1/500th sec
1/500th sec

The hotshoe adapter could also be a non-TTL radio trigger device, or a MiniTTL PocketWizard set to non-propietary mode which ignores the TTL pins.

The main reason for doing this is to effectively make your flash more powerful when trying to use it in bright sunlight as a fill in flash, and at the same time, the faster shutter speed allows wider apertures for your portraits, although you will almost certainly still need to use a ND or at least a polarising filter to further assist in getting a wide aperture in bright sunlight at ISO 200.

Food for thought.

 

 

 

The incredible Olympus OM-D E-M5’s hand held low light performance plus a high image quality wearable camera system! No more back pack, good bye tripod!

Friday, May 4th, 2012

Today was the 1st day I had the opportunity to take my new Olympus OM-D E-M5 Micro Four Thirds camera for a walk in the city.

It was a heavily overcast, wet day, and I decided I would catch the train in, leave my backpack at home, and carry my camera kit in my jacket pockets as well as carry a full size umbrella, just to see how it would go.

I took the E-M5, Olympus 12mm f/2.0, 17mm f/2.8 pancake, and 45mm f/1.8 lenses (I can’t wait until the 75mm f/1.8 comes out in about July!).

I could easily have also taken the Olympus 14-42mm collapsible kit lens in another pocket, they are all so light and compact.

I must say, this was the 1st time, I have been able to carry 3 lenses and such a high quality camera with me in my jacket pockets and would-be assailants would be none the wiser!

I have just downloaded Lightroom 4.1 RC so I could play with the Olympus RAW files, and being late at night now, I decided just to upload one untouched file other than being opened in Lightroom and resized and compressed for the web, and this is the one below top demonstrate how fantastic the hand holdable low light capabilities of this camera.

For this shot it was about 3 hours AFTER sunset, in the middle of a very dark alley, looking through my 12mm f/2.0 lens in the EVF the image was dark as the light levels were BELOW what the EVF is designed for (I didn’t put the Live Boost on, nor resort to iAUTO, both of which would have made the EVF brighter). The wall was lit by a distant lamp.

I was hand holding the camera at the end of a cold walk in the night air (~10degC), and the camera had no problems rapidly autofocusing on the graffiti on the wall even though it was so dark (I have the AF illuminator OFF as well !!).

So here is the untouched shot to give an idea of how sharp it is at f/2.0, ISO 800 and exposure 1/2 a second hand held – yes you read correctly half a sec hand held!!

Of course, I could have bumped ISO to 1600 and allowed a more reliable 1/4 sec exposure, but here is my one and only attempt at half a second on this shot before I caught the train home:

WARNING: this photo is NOT meant to have any artistic or photographic merit other than to show half-second hand held photos ARE possible!

12mm hand held at half sec exposure
When you can hand hold shots at 1/3rd a second reasonably reliably, it means you can get reasonable night street shots with moving headlights, as well as being able to do moving water shots such as waterfalls in case you forget your tripod.

For hand holdable low light wide angle at 24mm focal length in 35mm terms with AF, you just can’t do this with a Nikon or Canon cropped sensor dSLR to this degree and for this price.

For a start neither Canon nor Nikon make a 24mm equivalent prime lens for their cropped sensor dSLRs so you have to go for a zoom lens at f/4 (f/2.8 if you go Sigma), or the super expensive 14mm f/2.8 pro lens would be the closest prime, and in neither situation do you have image stabilisation.

And don’t even think about even putting the lens in your jacket pocket let alone a camera and 3 lenses.

When I was walking around and it was lightly raining, I just turned the camera with the lens downwards as these lenses are not weatherproof like the E-M5.

I just wish Olympus did not follow Canon’s lead and put a stupid ON/OFF switch at bottom rear of the camera, as I had to use 2 hands to turn it on, while for the most part I could just walk around and control everything with my right hand while my left hand held the umbrella up.

The other tricky time is trying to change lenses in the wet, it would be nice to have a 3rd hand as I was always worried I might drop one of the 3 items I was juggling.

Wouldn’t it be nice if Olympus made all these components TOUGH like their compact camera series!!

Very happy indeed so far with this camera.

It has its foibles but it is such an amazing camera for its size and the lenses are just so lovely, and the AF so fast, the foibles are insignificant in comparison.