Nikon D850 vs Nikon D810A
Nikon D850 vs Nikon D810A
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Nikon D850
While on recent trip to Japan -- with one stop being a visit with Nikon to attend the award ceremony for Nikon's annual Photo Contest -- Dave Etchells had a chance for an exclusive interview and Q&A session with top Nikon engineering and marketing staff in Tokyo to discuss, among other things, the all-new Nikon D850. In typical IR fashion, we will, of course, bring you the full in-depth interview in short order, but we wanted to pull out relevant excerpts from the interview as it pertained to the D850.
When shooting in DX mode, the D850's AF system has exactly the same coverage as it does on the D500.
When we asked whether the D850 would support different AF fine-tuning adjustments based on aperture (to handle lenses with spherical aberration, that shift their focus point slightly when stopped down) or for wide and tele focal lengths on a zoom, Nikon replied that they're aware of user requests in this area and are studying the feasibility, but it sounds like it won't be possible to add this capability to existing cameras via firmware updates.
The D850 has very strong features for video recording, but when we asked if they would be positioning the D850 as a go-to camera for primarily video users, they replied that they still consider still photography as the camera's main focus. They did very specifically want to cater to the increasing number of traditionally still shooters who are now also shooting video, though, so treated video recording as a very important use case. (We were interested to learn that dual still/video shooting by professionals is much more common in the US than in other parts of the world. We didn't ask, but are curious why that would be so much the case .)
One significant feature of the D850 that we discussed with Nikon is its ability to shoot 4K video with no horizontal cropping. This is a big benefit for video shooters!
When recording Full HD video, the Nikon D850 offers the option of electronic vibration reduction. This is accomplished by using a bit less than the full sensor to create the video image.
Given the huge buffer size on the Nikon D850, we wondered how long it would take to clear it to the memory card. The D850 supports the very fast XQD memory cards, so we asked how long it would take to clear the giant buffer when using one of them.
Nikon D810A
While Canon seems to have taken a page from Nikon's playbook with its twin versions of the 5DS and 5DS R (one with and without an anti-aliasing filter) like the D800 and D800E, Nikon's now using one from Canon's. Enter the Nikon D810A, a new astrophotography-specific variant of the 36.3-megapixel, full-frame D810.
Similar to the astrophotography version of Canon's popular 60D -- the Canon 60Da -- the D810A take a similar approach in that the camera includes a modified version of the infrared cut filter that sits atop the image sensor. The D810A's special IR cut filter has been been specially tweaked to allow for better transmittance of the hydrogen alpha wavelength -- in other words, greater sensitivity of the 656 nanometer wavelength of light, according to Nikon -- which will help the camera capture more of the red hues of far-off nebulae and constellations than the standard D810 can
Given the specialized nature of this modified IR cut filter, Nikon does not recommend using the D810A for general-purpose photography -- although, you'd be more than welcomed to, just be ready for the reddish cast in the resulting photos.
Apart from the new IR cut filter, the Nikon D810A is mostly identical, both physically and technologically, to the standard D810 model, although there are a couple of firmware changes. The D810A utilizes the same 36.3-megapixel, full-frame CMOS sensor paired with the fast EXPEED 4 image processor, as well as the sturdy magnesium alloy body, vibration-reducing mirror mechanism, optional electronic first-curtain shutter, and the bright 1,229K-dot, 3.2-inch LCD screen.
The firmware changes to the D810A are, naturally, related to its astrophotography focus. The D810A includes a new Long Exposure Manual Mode, which provides an increased range of slow-to-very-slow shutter speeds.
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