No, I´m not going to use both D800E and OM-D. This was just one of my reality checks. It is nice to check every now and then what´s going on with various brands and systems. I did not want have the subject as D800E versus OM-D because this also is not about that. There is no single camera of which I could say that it is made for me. There are a few cameras I could be perfectly happy with, if there were no other choices. Both of these two overlap my needs but differently, and I wanted to know to what extent and how differently.
One of obvious differencies between these cameras is physical size and weight. The image above shows them with lenses which give (almost) equal angles of view: Nikon 35mm f/1.4 G AF-S and Olympus M.Zuiko Digital 17mm f/1.8. Both are the best native "35mm" prime lenses from respective brands for these bodies.
The difference by 2X for focal lengths in these lenses shows that there is also the same difference between image size on sensor. The area of OM-D sensor is roughly one quarter of D800E sensor size. Respective sensor sizes in pixels are 6144 x 4912 pixels for Nikon (36 megapixels) Nikon and 4608 x 3456 pixels (16MP) for Olympus. Sensors have different aspect ratios, 3:2 for Nikon and 4:3 for Olympus. Because of different aspect ratios final images are cropped a bit differently and actual resolutions are dependent on this cropping. I would say that D800E has roughly 37% more linear resolution to start with when compared to OM-D. True relationship with image quality is dependent on many factors including filters on sensor, the lens and of course users´s shooting and post-processing technique.
I have used Nikon FF DSLRs long enough to be happy with D800E from the start. There´s "nothing" to it. It´s just like a Nikon should be. Olympus OM-D has become pretty much an extension of my right hand. D800E couldn´t become so much used because of weight and size. For me this is the difference, not handling as such but size and weight. Every extra lens makes the disparity only more favorable for OM-D.
This is the situation now. If I were still an advertising photographer I would go for more resolution and Nikon´s excellent 85mm PC-E lens. Nikon has also better AF tracking, but I don´t need it.
This is what I´m interested in. Final image quality with RAW images opened in latest Lightroom.
I posted in January a blog on diffraction. There D800E was my example for two reason: diffraction is easy to see because of huge resolution but also it is not such a problem as common "wisdom" says. I´m not going to duplicate those crops from image center here.
Here is my test targets as shot with D800E:
I shot the same with OM-D so that the subject ie. those targets take the same area of frame. Lets compare what happens in corner targets, which are far from extreme corners.
Above is D800E 35mm at f/8 and below OM-D 17mm at f/4. Nikon D800E crop is 100% and OM-D crop has been enlarged to the same size. Why these apertures? Because that´s my most used depth of field and DOFs are equal when D800E is closed down two steps more than OM-D.
Now, check Nikon 35mm center performance in my previous post. The difference is quite obvious to what is seen here with Nikon 35mm lens. Even here D800E crop is slightly sharper or should I say cleaner than the enlarged OM-D crop but the difference is neglible for any practical need. There is a test of Nikon 35mm f/1.4 G lens at photozone.de. They tested with Nikon D3x. D800E only amplifies the difference between center and corner performance.
In this example ISOs are at 100 for Nikon and 200 for Olympus, these are studio shots on tripod. I shoot normally hand held. To keep shutter speeds the same I would need then to raise my ISO for Nikon to 800 if OM-D is at 200 in order to have same DOF. Actually this would not be a problem for Nikon in this kind of situation. ISO 800 suffers only slightly. The difference is even not worth producing here. What happens though is that D800E loses it´s lead in dynamic range, which can´t be seen with this kind of target. According to dxomark.com these two cameras would have practically the same dynamic range at ISO 200/800 setup. The same is true for tonal range and color sensitivity. The only real difference between these cameras with these lenses would be resolution in the center of frame. (Structures in grayscale is not sensor noise, this structure comes from printed target).
I prepared print size files for you to print and see. Nikon crops are from the center of frame and, lazy as I am, OM-D crop is the same off-center as above. M.Zuiko 17mm has quite even performance over the frame. In print size A3 there is no visible difference in print between images or test target from these two cameras.
Also size A2 prints are quite similar with normal everyday subject, but with this kind of target the higher resolution of D800E (above) can just possibly be seen on glossy paper. It depends on printer, paper etc. Make a 6 by 6.1 cm and 300 ppi background in Photoshop. Copy and drop the above crop from A2 print file into it. Print with your printer. Any difference?
This is an image file for a crop from A1 print. Make a 6 by 8,7 cm and 300 ppi background in Photoshop. Copy and drop the above image file into it. Print with your printer. Any difference?
Pixel peeping on screen and reading numbers on some test sites is easy. Knowing what matters in real life and what doesn´t (and how much or how little) is a lot harder. These examples above show that the absolutes are not valid in real life, and these examples are still far from real life and in favor of the one which has the better starting point.
In real life hand held photography there is one more thing which forces these cameras closer to each other. It is in-body image stabilization (IBIS) which OM-D has.
What we have here is again D800E above and OM-D below, but this time I´m shooting hand held in a dim light. Exposure for OM-D is 1/13 s at f/4 and ISO 200 with IBIS on. I can get sharp images with a ratio of 9/10. To get sharp images with D800E, I had to set shutter speed at 1/30 s at f/8 and raise ISO accordingly to 2000. Now my test gave me sharp images with a ratio of 3/10. Sharp and sharp... Well, this is what I get at these parameters. This goes to show the power of IBIS. Besides of sharpness there are other things to consider, at ISO 2000 D800E has fallen below OM-D in dynamic range and color accuracy. IBIS keeps you going within the sweet spot of OM-D for a long time.
Technically, if you are striving for the most detailed images, Nikon D800E is far better than OM-D. It has more resolution, wider dynamic range and higher color accuracy. But then also you must be up to task because this goodness does not come for free for the careless shooter. You must use tripod, you must use only the best lenses inside their best performance envelope. Small things mean suddenly a lot if you want keep the performance up. On the other hand D800E has plenty. You can give away a lot and still get great images.
My D800 pluses compared to OM-D
- lots of resolution, dynamic range and color accuracy to start with
- better viewfinder in bright daylight
- possibility to have shorter DOF
My OM-D pluses compared to D800E
- size and weight
- IBIS helps keeping ISO low and dynamic range up
- better exposure metering (ETTR) with a practical gain of at least 1EV in DR
If I were a hardcore dedicated landscape photographer or still an advertising photographer, I would take D800E. While I am not, D800E does not give me anything above OM-D in practical shooting and in my print range of A3 to A1. It would not make my images any worse either. It only is bigger and heavier and it would strip me from many shooting opportunities which a smaller system gives just by being smaller and handier to have with me.