I suppose that the best flash, like the best camera, is the one you have with you. In that case, there’s a lot to be said for that dinky little flash that lives on top of the Nikon D810’s prism housing. On the other hand, it doesn’t stick up very far when you turn it… [Read More]
Archives for July 2014
Autofocus on the Nikon D810
I don’t have equipment to quantitatively test the dynamics of autofocus systems. It has been my experience that the dynamics are what differentiate one phase detection AF system from another, for the most part. Properly adjusted — and, if necessary, tweaked for each lens and distance range — they all seem to focus about as accurately,… [Read More]
EFCS results with a 400mm f/2.8 lens on a D810
Next up, in the series of lenses that I’m using for EFCS testing on the D810: the Nikon AF-S 400mm f/2.8 D II. Not a VR lens; the one just before the Canon patents ran out. I started at f/5 at 1/500 and worked down in 1/3 stop intervals. The results, measured for horizontal edges:… [Read More]
EFCS results with Nikon 70-200 on the D810
I posted sharpness test results with and without EFCS with the Zeiss 135mm f/2 APO-Sonnar here. EFCS seemed to make a significant difference at shutter speeds from a few tenths of a second to a hundreth or so. Some people have reported no improvement with common zoom lenses. I thought I’d try the AF-S Nikkor… [Read More]
EFCS on the Nikon D810
Before I get to how the electronic first curtain shutter (EFCS) on the D810 works, it will be instructive to look at how the all-mechanical focal plane shutter operates. Here’s a photograph of an analog oscilloscope with the time base set to 0,5 milliseconds/division. EFCS was disabled, and the shutter speed was 1/1000 second: … [Read More]
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