It’s a special filter on the sensor, which makes the transition between pixels smoother, and this way improves the quality of color rendering in certain shooting situations.
The engineers also removed the opticallow pass filter(OLPF), which further sharpens the images (with a risk of moiré on some periodic textures.)
However, amoiré pattern is more hypothetical because you’re unlikely to encounter this effect in real-life shooting.
Initially, an experiment without a filter was first carried out on D800E.
Nikon realized that no one was experiencing any significant issues and the sensor without the filter went to the masses in the form of Nikon D810 (and D7100 too, by the way).
Having no low-pass filter does such a good job that the photos are sharp even with the lenses that aren’t very sharp.
What I like about this camera as well is that the shutter noise is quiet, you practically don’t hear it when shooting.
(If you’re familiar with D7100, then you’ll have an idea how quiet it is.)
About Burst Rate, Autofocus, Video and ISO
Thanks to the EXPEED 4 processor that the camera received, its burst rate is 5 frames per second at a high resolution (compare it with the 4 fps of the last model), and up to 7 fps at a lower resolution.
The fact is, the frame rate corresponds to the one on D700, so it makes D810 pretty much universal.
The standard frame rate is 8-9 fps in high RAW + JPEG resolution and up to 20 frames in JPEG. It’s pretty good for a camera with such resolution, the image buffer is pretty large.
Is the Nikon d810 good for sports?
Even though 5 fps is pretty low for a full-frame camera, it’s still enough for shooting wildlife and sports related events. (See my pro tip below on how to increase your number of frames per second.)
You can shoot pretty much anything at a rate of 5 fps.
But if it’s something sports-related, then just switch your camera to DX mode so that it gives you extra frames per second (one or two, depending on whether you are using an additional battery pack or not).
What about autofocus?
In terms of the autofocus system, it hasn’t changed.
It’s the same Nikon Multi-CAM 3500FX with 51 focus points and 15 cross-over sensors, which makes autofocus very fast and accurate.
And still there have been improvements in their algorithms. There is now an automatic focusing on a group of points.
There’s a wide range of autofocus possibilities:
fine-tuning of all points and the possibility of selecting a zone;
adequate tracking autofocus;
perfectly working 3D tracking;
I mean the face tracking autofocus is so great that you won’t even want to get off the auto mode. 3D tracking and dynamic area autofocus almost always “hit the target” from the first shot.
In Live View mode, contrast autofocus works – it’s not as fast but it’s just as accurate.
The tracking autofocus definitely improved, and it’s something that will especially appeal to videographers or hybrid shooters.
Speaking of videography.
The video capabilities in D810 had also been modernized.
What I am trying to say here is that this Nikon DSLR is fully adapted for professional videoshooting with its Full HD recording at a rate of up to 50p/60p.
A thing called Picture Control “Flat” was realized especially for videographers, which gives them the maximum of color correction capabilities for post-processing.
To record audio, you can use external stereo microphones, and during recording itself, you can actually monitor the sound using headphones.
Last but not least, video-recording can be done onto a memory card, an external recorder using an HDMI connector, or both.
What about ISO?
The maximum ISO threshold is up to ISO 12800, and in the “Hi 2” mode you can now take photos with ISO of up to 51200.
With such characteristics, there is no need for high-aperture lenses. The minimum ISO now is not ISO 100, as was seen in D800, but ISO 64 (in the “Lo 1” it’s ISO 32).
Overall, the images at high ISO, let’s say 10 000, look absolutely amazing.
Yes, you’ll see a bit of noise but it’s definitely tolerable.