When I graduated from college, I was equipped for two professions. I could be an electrical engineer; I had a BSEE to testify to my training, and summer and part-time jobs gave me a limited amount of experience. I could have been a photographer; I had no formal training, but eight years of working on… [Read More]
Thoughts on long-lens photography
Before electronic first-curtain shutter (EFCS), long-lens (which I’ll define as 300mm and over on a full-frame 35mm camera) photography was usually about wildlife and sports. For those activities ultimate sharpness wasn’t the prime concern. Those who attempted SLR landscape photos were usually frustrated by camera motion, even with the mirror locked up. With mirrorless cameras… [Read More]
EFCS in the real world with the Nikon 200-400 f/4 on the D810
Yesterday I posted a set of pictures with the Nikon AF-S 200-400 mm 1:4G lens on the Nikon D810. The images were intended to get an handle on center and corner sharpness of that lens with a distant subject at various f-stops. I made the images for yesterday’s post at ISO 640, about a stop… [Read More]
Testing the Nikon 200-400mm f/4
I’m trying to find a zoom lens that works well for distant landscapes, sometime stitched, sometimes not. My initial experiments with the Nikon AF-S Nikkor 200-400 mm 1:4G were unsuccessful. However, after testing the known sharp Nikon AF-S 400mm f/2.8 under similar conditions and finding blur traceable to thermal atmospheric turbulence, I was ready to… [Read More]
EFCS without atmospheric effects
Yesterday, I did some testing of the Nikon 400mm f/2.8 lens on the Nikon D810 with and without EFCS, and didn’t see much difference. I went back and looked at the MTF testing I did with the D810 and the 400/2.8, and there wasn’t much difference at shutter speed faster than 1/125 second. So I… [Read More]
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