azr
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Moin,
ich habe auf Facebook folgenden Beitrag gelesen, und finde ihn extrem informativ.
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I own both cameras and the are both fantastic.
The A1 has advantages of FPS, focusing speed, truly useful silent shutter, better 8k video, less rolling shutter.
A7RV advantages, ai AF chip, expanded tracking presets, flippy screen movement.
Here is info about how the AF system works. It is a lot more than just the FPS difference of 10 or 30 FPS.
Difference between A1, A9III, A7RV
The A7RV can take great photos of moving subjects like surfing, but you should know that there are significant differences in both the sensor technology and AF systems and performance, between the A7 line and the Faster cameras designed for this type of photography. These faster cameras are the A9, A9II, A9III and A1.
First is the sensor. The Sony A1 (A9, A9II, A9III) all have stacked sensors, this allows images to move off the sensor 10x faster than regular sensors. This also allows much faster AF. A regular Sony camera adjusts AF (and AE) two times for each shot taken. So up to 20 times a second at 10FPS, these are all A7 variations and generations.
The A9II (and A9 from 2017) adjusts AF (and AE) three times for each shot taken. So up to 60 times a second at 20FPS.
The A1 adjusts AF (and AE) four times for each shot taken. So up to 120 times a second at 30 FPS. The brand new A9III, adjusts AF and AE two times for every shot taken and it shoots at 120 Frames a second, so it is evaluating and adjusting AF (and AE) 240 times a second.
Now let’s look at focusing system software (and new hardware in a few models). Focusing, especially tracking and eye AF capability has been significantly improved since the 3rd generation cameras.
The new Top level is called Real-time Recognition AF, it is in the A6700, A7RV, A7CII, A7CR and the A9III. It is a huge upgrade; the eye AF is so fast and so sticky. You also have expanded subject detection presets for Humans, birds, animals, animal or birds, insects, cars, trains, airplanes. These cameras have not only newer software, but they also have a new hardware element, a new ai AF chip that handles all AF. This helps make everything faster as all AF is now off the main cpu, allowing it to do other operations faster.
One step down is Real-time Tracking. It is in the A1, A9II, A9, A7RIV, A7SIII, A7IV, A7C. This option gives useful and capable Tracking for humans, birds, animals.
All other cameras use various Eye AF or just an AF system built like a DSLR camera.
So even though the A7RV has the newest AI AF chip, newest software and special presets for things like bird, animal, human, insects, planes, trains and automobiles, it just can’t compete with the A1, or any model of A9, past the first couple photos. I often say my A7RV will find the subject faster than my A1, but as soon as the subject moves it gets behind based on its slower AF system and FPS. By the time the A7RV has taken 5 photos, it has evaluated and adjusted AF 10 times. In that space of time the A1 would have shot 15 photos and evaluated and adjusted AF 60 times. The A9III would have shot 60 photos and evaluated and adjusted AF 120 times.
The A9III adds the AI Chip, software and special presets to the stacked sensor and even throws in a global shutter to be the absolute best for this type of photography. There are lots of advantages to the Global shutter, but I won’t go into it for this discussion. The A9III will be the best at tracking anything moving (or still for that matter).
All three cameras have a couple of disadvantages compared to the other two. The A9III disadvantages: Lower dynamic range with base ISO of 250. Less capability to crop in later with only 24mp. The A1 disadvantages, older body with only a tilting screen, one generation older AF system. The A7RV disadvantages, no stacked sensor and only 10FPS, significantly behind the other two in tracking fast moving subjects.
All three are fantastic cameras and you would probably be happy with any of them. But you should know how the cameras are different
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Für mich klingt das alles gut nachvollziehbar. Stimmt das soweit - auch bezogen auf die Fokussierung pro Bild?
ich habe auf Facebook folgenden Beitrag gelesen, und finde ihn extrem informativ.
====
I own both cameras and the are both fantastic.
The A1 has advantages of FPS, focusing speed, truly useful silent shutter, better 8k video, less rolling shutter.
A7RV advantages, ai AF chip, expanded tracking presets, flippy screen movement.
Here is info about how the AF system works. It is a lot more than just the FPS difference of 10 or 30 FPS.
Difference between A1, A9III, A7RV
The A7RV can take great photos of moving subjects like surfing, but you should know that there are significant differences in both the sensor technology and AF systems and performance, between the A7 line and the Faster cameras designed for this type of photography. These faster cameras are the A9, A9II, A9III and A1.
First is the sensor. The Sony A1 (A9, A9II, A9III) all have stacked sensors, this allows images to move off the sensor 10x faster than regular sensors. This also allows much faster AF. A regular Sony camera adjusts AF (and AE) two times for each shot taken. So up to 20 times a second at 10FPS, these are all A7 variations and generations.
The A9II (and A9 from 2017) adjusts AF (and AE) three times for each shot taken. So up to 60 times a second at 20FPS.
The A1 adjusts AF (and AE) four times for each shot taken. So up to 120 times a second at 30 FPS. The brand new A9III, adjusts AF and AE two times for every shot taken and it shoots at 120 Frames a second, so it is evaluating and adjusting AF (and AE) 240 times a second.
Now let’s look at focusing system software (and new hardware in a few models). Focusing, especially tracking and eye AF capability has been significantly improved since the 3rd generation cameras.
The new Top level is called Real-time Recognition AF, it is in the A6700, A7RV, A7CII, A7CR and the A9III. It is a huge upgrade; the eye AF is so fast and so sticky. You also have expanded subject detection presets for Humans, birds, animals, animal or birds, insects, cars, trains, airplanes. These cameras have not only newer software, but they also have a new hardware element, a new ai AF chip that handles all AF. This helps make everything faster as all AF is now off the main cpu, allowing it to do other operations faster.
One step down is Real-time Tracking. It is in the A1, A9II, A9, A7RIV, A7SIII, A7IV, A7C. This option gives useful and capable Tracking for humans, birds, animals.
All other cameras use various Eye AF or just an AF system built like a DSLR camera.
So even though the A7RV has the newest AI AF chip, newest software and special presets for things like bird, animal, human, insects, planes, trains and automobiles, it just can’t compete with the A1, or any model of A9, past the first couple photos. I often say my A7RV will find the subject faster than my A1, but as soon as the subject moves it gets behind based on its slower AF system and FPS. By the time the A7RV has taken 5 photos, it has evaluated and adjusted AF 10 times. In that space of time the A1 would have shot 15 photos and evaluated and adjusted AF 60 times. The A9III would have shot 60 photos and evaluated and adjusted AF 120 times.
The A9III adds the AI Chip, software and special presets to the stacked sensor and even throws in a global shutter to be the absolute best for this type of photography. There are lots of advantages to the Global shutter, but I won’t go into it for this discussion. The A9III will be the best at tracking anything moving (or still for that matter).
All three cameras have a couple of disadvantages compared to the other two. The A9III disadvantages: Lower dynamic range with base ISO of 250. Less capability to crop in later with only 24mp. The A1 disadvantages, older body with only a tilting screen, one generation older AF system. The A7RV disadvantages, no stacked sensor and only 10FPS, significantly behind the other two in tracking fast moving subjects.
All three are fantastic cameras and you would probably be happy with any of them. But you should know how the cameras are different
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Für mich klingt das alles gut nachvollziehbar. Stimmt das soweit - auch bezogen auf die Fokussierung pro Bild?
