As a long-time digital photographer, I feel compelled to chime in here. Today's modern digital cameras have some amazing technology built right into the camera's internal processors that control all those many functions.
Most days I will set the camera's shutter speed to "auto", and pick an f-stop to set my anticipated "depth of field" to give me control over what will be in focus when the finished image is captured and processed within the camera. Other times I will set the shutter speed and let the camera's internal processors determine the lens opening (f-stop). Beyond that, modern lenses for digital cameras have their own tiny microprocessors built in so the lens can communicate with the camera body to help eliminate shake and vibrations. These lenses are not inexpensive, but they can actually work very well to give the photographer greater creative choices.
Much of that equation depends on the photog's assignment - what he or she envisions the challenges they might encounter. My camera settings will vary accordingly - a posed fashion model vs a fighter jet zooming by at 400 mph, for example. I've done high fashion, air shows, public events, and wildlife in the field. The human behind the lens makes some of those calculations, but the camera itself contributes much to the creative process these days.
Just my $0.02 - worth exactly what you paid for it.
I'm not sure what you're implying and I'm not going to assume. But I too shoot almost exclusively in aperture priority (non-photo people: I pick the F stop, camera decides shutter speed, same as guy above)
It's extremely rare for cameras (of any brand and model) to pick 1/8000, even on a bright sunny day unless ISO is bumped up high (by the photographer). And if ISO was set to "auto", the chances of 1/8000 being selected is as good as zero because the camera is going to lower ISO first to something like 100, 125 or 160 (as low as it'll go on most cameras) before it increases shutter speed.
And there's no reason to bump up ISO when conditions are brightly lit unless you explicitly want to increase shutter speed. Any photographer worth squat is going to lower ISO on a sunny day because even with ISO 100, the shutter speed is going to be something like 1/1000 to 1/2000 anyway which is fast enough to capture all sorts of moving subjects including race cars.
What I'm trying to say is, getting the shutter speed up to 1/8000 was a deliberate choice made by the photographer who took the Trump shot. And just like the OP X post, I'd ask "Why?" unless he was expecting something very fast moving to happen.
Typically, the higher the ISO, the higher the noise - that will be true within any closed system. Quality optics and imagers with large cells and high quantum efficiency will allow shorter exposure times with the same ISO.
In any case, you are correct. A typical high end camera system will pick ISO's that favor picture quality. A photographer will pick settings for the moment.
On a side note, many moons back I had a project where they wanted to know if we could image a fast moving object (on industrial equipment) and I was able to get to an effective shutter speed of 1/2000000. The camera couldn't do it - that required specialized lighting. Jitter in the system required a camera shutter of around 1/20000.
As a long-time digital photographer, I feel compelled to chime in here. Today's modern digital cameras have some amazing technology built right into the camera's internal processors that control all those many functions. Most days I will set the camera's shutter speed to "auto", and pick an f-stop to set my anticipated "depth of field" to give me control over what will be in focus when the finished image is captured and processed within the camera. Other times I will set the shutter speed and let the camera's internal processors determine the lens opening (f-stop). Beyond that, modern lenses for digital cameras have their own tiny microprocessors built in so the lens can communicate with the camera body to help eliminate shake and vibrations. These lenses are not inexpensive, but they can actually work very well to give the photographer greater creative choices. Much of that equation depends on the photog's assignment - what he or she envisions the challenges they might encounter. My camera settings will vary accordingly - a posed fashion model vs a fighter jet zooming by at 400 mph, for example. I've done high fashion, air shows, public events, and wildlife in the field. The human behind the lens makes some of those calculations, but the camera itself contributes much to the creative process these days. Just my $0.02 - worth exactly what you paid for it.
I'm not sure what you're implying and I'm not going to assume. But I too shoot almost exclusively in aperture priority (non-photo people: I pick the F stop, camera decides shutter speed, same as guy above)
It's extremely rare for cameras (of any brand and model) to pick 1/8000, even on a bright sunny day unless ISO is bumped up high (by the photographer). And if ISO was set to "auto", the chances of 1/8000 being selected is as good as zero because the camera is going to lower ISO first to something like 100, 125 or 160 (as low as it'll go on most cameras) before it increases shutter speed.
And there's no reason to bump up ISO when conditions are brightly lit unless you explicitly want to increase shutter speed. Any photographer worth squat is going to lower ISO on a sunny day because even with ISO 100, the shutter speed is going to be something like 1/1000 to 1/2000 anyway which is fast enough to capture all sorts of moving subjects including race cars.
What I'm trying to say is, getting the shutter speed up to 1/8000 was a deliberate choice made by the photographer who took the Trump shot. And just like the OP X post, I'd ask "Why?" unless he was expecting something very fast moving to happen.
Typically, the higher the ISO, the higher the noise - that will be true within any closed system. Quality optics and imagers with large cells and high quantum efficiency will allow shorter exposure times with the same ISO.
In any case, you are correct. A typical high end camera system will pick ISO's that favor picture quality. A photographer will pick settings for the moment.
On a side note, many moons back I had a project where they wanted to know if we could image a fast moving object (on industrial equipment) and I was able to get to an effective shutter speed of 1/2000000. The camera couldn't do it - that required specialized lighting. Jitter in the system required a camera shutter of around 1/20000.
I'm so old I still remember the day I traded in my pterodactyl chisel box for a canon 35mm.
LOL. I worked with digital cameras before they hit the consumer market.
Edit - maybe I should qualify that statement. VCR video cameras were all the rage then, so technically....not quite true.
Times have changed a lot over the last 30-40 years.