Kamis, 22 Agustus 2013

3 Way Holiday Camera Shootout Part 7, Ergonomics


Lumix G6 with 14-140mm lens
 
Summary of ergonomic concepts applicable to cameras   Ergonomics is the study of designing equipment and devices that fit the human body, it's movements and it's cognitive abilities.
Camera operation can be considered in four Phases, Setup,  Prepare, Capture and Review. Ergonomics devolves to Holding, Viewing and Operating in each of these Phases but particularly Capture Phase in which there is the highest requirement to carry out specific actions in a limited time.
General Observations  Each of these cameras offers at least acceptable ergonomics and none is without fault.
Holding  The lighter cameras are easier to hold than the D5200.  They require less constant support under the lens by the left hand and less gripping force by the right hand.  The D5200 and V2 each have a reasonable handle but a poorly located and shaped thumb support. The G6 allows the right hand to adopt a holding posture which is closer to the ideal "half closed, relaxed" position which I described in the post on functional anatomy of the human hand. There is enough space on the D5200 for a better thumb support which could be like that typically seen on Canon DSLR's. This would mean re-arranging control modules but that would not be difficult. I have also designed and built a mockup with the same dimensions as the V2 but with a much more user friendly layout.
Overall the most comfortable and secure kit to hold is the G6 followed by the V2 then the D5200.
Viewing  The modern electronic camera has complex viewing requirements. The user has to preview/review the image in the eye level viewfinder and also on the Monitor. In addition a user selectable menu of camera data must be visible on or beneath the eye level and monitor image. It is desirable that the viewfinder and monitor be configured to look the same and present the same data in the same format. This makes for a seamless segue from one to the other. In this regard, the mirrorless cameras have an advantage.
In my experience a fully articulating monitor (as found on the G6 and D5200) can be very useful. But performance with D5200 monitor view is sluggish.
In bright sunny conditions the D5200 optical viewfinder (OVF) provides the most appealing subject preview with the best shadow detail but the camera data can be almost invisible. Image playback is not available on an OVF.
In bright sun the G6 EVF is rather contrasty with blocked up shadows but the camera data are always easy to read.
The V2 EVF presents a slightly soft blue tinted image which is adjustable for brightness but nothing else. The V2 eyecup is a bit small, allowing light to impinge on the viewing eye, making clear preview difficult.
In Low light levels  The D5200 OVF gets quite dark. The EVF's on the two MILC's gain up in low ambient light to present a steady bright view in all conditions. In extremely dark conditions the G6 EVF is subject to jitter when panning but that is uncommonly seen in regular photographic practice.
In any conditions the very functional and fully articulated monitor of the G6 is  useful and practical. I have found that having become accustomed to this type of monitor on several Lumix cameras over the last two years I do not want to go back to a camera with less functional monitor live view or a non articulated or just pivoting monitor.
So the D5200 and V2 each have their viewing strengths but overall the G6 provides the best viewing experience, followed by the V2 then the D5200.

On the left, Nikon 1 V2. On the right my wooden mockup with the same dimensions.  This has raised shoulders and a completely revised user interface with JOG lever, providing excellent ergonomics.
Operating  Modern electronic or hybrid mechanical/electronic cameras (like DSLR's) are very complex machines. This poses a challenge to designers. How can they pack into the device the multitude of functions and capabilities which are expected these days while maintaining a user interface which ordinary humans can understand and operate efficiently ?
I will just mention some of the highlights and problems with each camera as a full discussion of operating characteristics would be too complex for this blog post. I have posted detailed discussion about analysis of camera operation in early posts on this blog.
 D5200  In eye level view operates reasonably efficiently.
ISO can be adjustable via the Fn button if it is so tasked. But the Fn button is difficult to locate by feel. The D5200 implements ISO/Auto ISO in a fashion which I find strange and frustrating. In the Shooting Menu, or My Menu if so allocated, you can select to switch Auto ISO On or Off.  If  set  On then you cannot set a specific ISO via the Fn button or the menu.  You have to switch Auto ISO Off.
In the other two cameras the Auto ISO setting is contiguous with specific ISO settings which is a much more coherent arrangement.
Exposure Compensation is available via the +/- button behind the shutter button. With some practice this is easy enough to find by feel.
Direct Focus Area control is available on the Multi Selector. This is easily accessible to the right thumb and this function works well, except that the active AF area is confined to the central part of the frame. MILC's can use the whole frame.
AF start can be allocated to the AE-L/AF-L back button in proper DSLR fashion. But this capability is oddly implemented. If AF start is allocated to the back button, it is disabled from the shutter button. I can more or less see the logic of this but in practice I find it irritating and I don't like cameras which irritate me.
If you want to adjust Image Quality, AEB, WB, Focus Mode, AF Area Mode, Meter Pattern or Flash Mode you have to stop using the OVF, lower the camera, open the monitor (if it was closed) press the [i] button, press the [i] button again then scroll around to your desired setting with the Multi Selector, make the adjustment then return to eye level viewing. This workaround is partly a consequence of operational constraints built into the basic SLR design and partly a result of the "semi-beginner-style" user interface of the D5200.
 Compare this to the G6  which can be user configured to be able to make a comprehensive list of adjustments by feel, while continuously viewing through the EVF.

Nikon 1 "V3" mockup being held in the right hand. I needed my left hand to make the photo. I rate this as being the smallest camera size which can accommodate a fully ergonomic shape and control module layout.
V2  The designers of the V2 have deliberately restricted the number and range of features, functions and adjustments available. This is not such a bad approach as it makes the camera the easiest of the three to set up and learn to operate effectively. It can manage most of the requirements of most beginner to enthusiast users. The dials are well designed and turn with the right amount of  resistance and clicky feel. The V2 is a vast improvement over the incomprehensibly crippled V1. The F button could be implemented much better if it was configured like the Q Menu on current Lumix cameras.
I have designed and built a wooden mockup camera having the same dimensions as the V2. This is a proof of concept exercise which shows that within the dimensional envelope of the V2 it is possible to design a fully featured pro style camera with excellent ergonomic efficiency.
G6  My interest in ergonomics was provoked by Panasonic's first "G-Micro" camera, the G1, which superficially looks like and is aimed at the same user demographic as the G6.  But I found the G1 to be a really frustrating thing to operate with many ergonomic deficiencies. The G6 shows that the details of user interface implementation are of the utmost importance. The G1 was, in my view, an ergonomic kludge while the G6 is a pleasure to use for the snapshooter or expert alike. Press the [iA]  button for  a simple point-and-shoot user experience. Or switch to one of the user control modes, access the Fn button options and build a camera with a sophisticated user interface designed to individual requirements.
All the functions which need to be adjusted in Capture Phase can be made with the eye to the viewfinder, by feel, without breaking the flow of image capture activity.
The downside of this sophistication is that the G6 is more daunting for the novice at the Setup phase of use.
So the G6 is the most efficient camera to operate, followed by the V2 then the D5200.
Comment about ergonomics, DSLR-vs-MILC  A well designed and implemented MILC can provide a streamlined, integrated user interface which no DSLR can match due to the presence of the flipping mirror. This was one of the very best ideas of mid 20th century mechanical camera design but it is unable to seamlessly integrate the complex requirements of a modern, multi view, multi function electronic camera device.
Sony tried to deal with this problem with it's SLT (Single Lens Translucent) range of DSLR style cameras. These cameras have a fixed mirror which allows about 60% of the incoming light to reach the sensor and the remainder to reflect up to the PDAF module in the hump. This technology does provide operational and ergonomic benefits over the standard DSLR type. However these cameras are forever stuck with a mirror sitting between the lens and sensor, blocking a substantial part of the light, gathering dust and preventing reduction of the flangeback distance. It appears from rumor sites that Sony will probably move it's entire interchangeable lens camera lineup to MILC type quite soon.

Ergonomics, ranking

1. G6/14-140mm

2. V2/10-100mm

3. D5200/18-200mm

Next, Video User Experience

 

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