Focus Mode: One Shot vs Servo
p.1 #1Focus Mode: One Shot vs Servo
Ok, so I've always used one shot as the default and servo for sports or when I know the distance is changing quickly. From film SLR's this is what I have always done. I do recall in those dim dark ages that servo was flaky with the very limited focus points (maybe I should say point singular since I'm not sure my first SLR had more than one). I always refocus between shots, so not like I keep a static point and use it no matter what happens.
BUT it occurred to me last night - I have no idea why all of a sudden this came to me - maybe I should be shooting people and general stuff with servo now days that the eye detect is so damn good. Obviously not landscapes nor on a tripod or alike but otherwise everything.
Have I had a stroke and this is just a really bad idea or have I been hiding under a rock since Y2K?
Am I guilty of not moving as the tech has moved?
What do you all do now (presuming a modern mirrorless)?
BUT it occurred to me last night - I have no idea why all of a sudden this came to me - maybe I should be shooting people and general stuff with servo now days that the eye detect is so damn good. Obviously not landscapes nor on a tripod or alike but otherwise everything.
Have I had a stroke and this is just a really bad idea or have I been hiding under a rock since Y2K?
Am I guilty of not moving as the tech has moved?What do you all do now (presuming a modern mirrorless)?
Jul 15, 2026 at 04:30 PM
p.1 #2Focus Mode: One Shot vs Servo
I always use servo with BBF for everything. There was a time many years ago when AF servo might cause a lens to oscillate around a focus position, so people avoided it.
EBH
EBH
Jul 15, 2026 at 04:37 PM
p.1 #3Focus Mode: One Shot vs Servo
I used to operate in the mode described when the 5D3 was my main camera. When I jumped to the R5, I was completely blown away with the AF capability improvements. I started to rethink how I shot and change a number of parameters. One of them was the switch to servo. I now rarely go to one shot.
BTW, because I started to do more sports (kids got to the right age) and wildlife (combination of R5 and COVID) I got addicted to burst mode to the point of using 15-20fps 100% of the time. I've since toned down, but still mostly keep the camera in the low-speed continuous shooting mode and adjust to high speed for sports and wildlife.
I also use 100% electronic shutter. There are some drawbacks, but once I experienced silent shooting I decided to make the switch and haven't looked back.
These transitions didn't happen all at once. One Shot to Servo was somewhat quick since it was part of the whole AF improvements fun. The transition to burst modes came with wildlife and sports, then bled into eveything and got out of control. Now I use 15-20fps for sports/wildlife, except for special occasion where I might crank it up to 30-40fps and for most eveything else I keep it at 3-5fps.
I moved to electronic shutter after a bit over a year of using the R5. I was afraid of all the rolling shutter distortion, DR loss, etc, that many discussed all over the web. But I noticed that after a year with the R5, my shutter count was as high as the 5D3 I had used for 6 years. So I decided to use ES for bursts. The rolling shutter and/or DR issues weren't that bad and I just loved to have sighlent shooting! I am now at 100% ES, even with my R7!
I've more recently moved to Auto ISO with EV compensation (which I end up using less and less).
As tech evolves, it is fun to figure out new ways of shooting.
That said, there are times that I just love the old tech, no matter how much better the new tech is supposed to be. While many of my friends talk about the joys of self-driving cars (or heavily assisted driving) I insist on driving a stick.
BTW, because I started to do more sports (kids got to the right age) and wildlife (combination of R5 and COVID) I got addicted to burst mode to the point of using 15-20fps 100% of the time. I've since toned down, but still mostly keep the camera in the low-speed continuous shooting mode and adjust to high speed for sports and wildlife.
I also use 100% electronic shutter. There are some drawbacks, but once I experienced silent shooting I decided to make the switch and haven't looked back.
These transitions didn't happen all at once. One Shot to Servo was somewhat quick since it was part of the whole AF improvements fun. The transition to burst modes came with wildlife and sports, then bled into eveything and got out of control. Now I use 15-20fps for sports/wildlife, except for special occasion where I might crank it up to 30-40fps and for most eveything else I keep it at 3-5fps.
I moved to electronic shutter after a bit over a year of using the R5. I was afraid of all the rolling shutter distortion, DR loss, etc, that many discussed all over the web. But I noticed that after a year with the R5, my shutter count was as high as the 5D3 I had used for 6 years. So I decided to use ES for bursts. The rolling shutter and/or DR issues weren't that bad and I just loved to have sighlent shooting! I am now at 100% ES, even with my R7!
I've more recently moved to Auto ISO with EV compensation (which I end up using less and less).
As tech evolves, it is fun to figure out new ways of shooting.
That said, there are times that I just love the old tech, no matter how much better the new tech is supposed to be. While many of my friends talk about the joys of self-driving cars (or heavily assisted driving) I insist on driving a stick.
Jul 15, 2026 at 09:25 PM
p.1 #4Focus Mode: One Shot vs Servo
I haven't use One Shot probably since... I can't remember. At least very far back into the DSLR days, if not film. With mirrorless, I see no need for it based on equipment capabilities and how I use the equipment. I also use back buttons to activate AF rather than half-pressing the shutter release, which when a back button is released, it effectively locks focus.
For sure with people photography, shallow depth of field and subject/face/eye detection/tracking in dynamic situations (camera and/or subject not stationary), Servo is necessary.
For sure with people photography, shallow depth of field and subject/face/eye detection/tracking in dynamic situations (camera and/or subject not stationary), Servo is necessary.
Jul 15, 2026 at 09:55 PM
p.1 #5Focus Mode: One Shot vs Servo
I think if you are using centre spot AF - focus/recompose then spot focus is the default setting. If it’s sport or kids running around, or pets (anything that moves!! ) then AiServo is king…especially now with eye tracking.
Remember the AiFocus??
That never worked for me. I once accidentally set AiFocus at son’s football match -moments concentration relapse - came away with 1700 blurred shots.
Needless to say I HATE AiFocus now… utterly useless.
Remember the AiFocus??
That never worked for me. I once accidentally set AiFocus at son’s football match -moments concentration relapse - came away with 1700 blurred shots.
Needless to say I HATE AiFocus now… utterly useless.
Jul 15, 2026 at 10:17 PM
p.1 #6Focus Mode: One Shot vs Servo
I switched to nearly full-time use of servo with an initial point selected when I got the R6, my first mirrorless. I use single shot occasionally if the particular subject is causing the servo to wander off the intended point. Single point does still have an advantage in very low light if you have exposure preview enabled. In this case, the servo AF sees what you see, which if very dark, will cause it to struggle. Single shot AF will blip the exposure just long enough to obtain focus.
Jul 15, 2026 at 10:22 PM
p.1 #7Focus Mode: One Shot vs Servo
Guess I'm the odd man out as I still use one-shot and single point much of the time on my R7 and R6 MK II, but then I'm mostly shooting static subjects like landscapes and macro. Servo wanders around too much and, thus, I reserve its use for more fleeting subjects like moving critters 'n bugs. I customized the AF-ON button to toggle between servo and one-shot.
Jul 16, 2026 at 03:16 AM
p.1 #8Focus Mode: One Shot vs Servo
On the R5II, I have the AF On button programmed to engage non-AI servo tracking (so just continuous focus at the focus point), and one of the adjacent function buttons to engage eye AF. I have the other button set up to toggle between single shot and servo, but to date, all it really does is annoy me as I inadvertently turn off continuous AF. I think I've used non-continuous AF less than 5 times since purchasing the camera.
Jul 16, 2026 at 06:39 AM
p.1 #9Focus Mode: One Shot vs Servo
Like others, I use rear-button focusing and have programmed the AF-On button for One Shot single point AF, and the AE-Lock button for AI Servo AF with full area tracking + eye tracking. Lets me move back and forth smoothly enough for most things.
I probably cling to One Shot / Single Point as my *primary* mode out of long habit with DSLRs though.
If I am shooting sports, however, I usually set the AF-On button for AI Servo with single point + expansion points, at least for the duration of the event.
I probably cling to One Shot / Single Point as my *primary* mode out of long habit with DSLRs though.
If I am shooting sports, however, I usually set the AF-On button for AI Servo with single point + expansion points, at least for the duration of the event.
Jul 16, 2026 at 09:12 AM
p.1 #10Focus Mode: One Shot vs Servo
Gochugogi wrote:
Guess I'm the odd man out as I still use one-shot and single point much of the time on my R7 and R6 MK II, but then I'm mostly shooting static subjects like landscapes and macro. Servo wanders around too much and, thus, I reserve its use for more fleeting subjects like moving critters 'n bugs. I customized the AF-ON button to toggle between servo and one-shot.
Please clarify what you mean by 'wanders around too much' because back in the DSLR era, Canon's AI Servo mode used to oscillate focus a fair amount when used on stationary subjects, though it improved greatly with more recent DSLR models. Are you saying this is what you're seeing with your mirrorless cameras, too (not holding consistent focus on a static subject)? Or did you mean that subject recognition and tracking doesn't reliably stick to and the focus point is moving off the intended subject? If this, then I would be more likely to agree because it seems that at least with Canon, when a subject that is being tracked around the frame stops moving, after a few seconds the camera decides it needs to look for something new to latch onto.
Guess I'm the odd man out as I still use one-shot and single point much of the time on my R7 and R6 MK II, but then I'm mostly shooting static subjects like landscapes and macro. Servo wanders around too much and, thus, I reserve its use for more fleeting subjects like moving critters 'n bugs. I customized the AF-ON button to toggle between servo and one-shot.
Please clarify what you mean by 'wanders around too much' because back in the DSLR era, Canon's AI Servo mode used to oscillate focus a fair amount when used on stationary subjects, though it improved greatly with more recent DSLR models. Are you saying this is what you're seeing with your mirrorless cameras, too (not holding consistent focus on a static subject)? Or did you mean that subject recognition and tracking doesn't reliably stick to and the focus point is moving off the intended subject? If this, then I would be more likely to agree because it seems that at least with Canon, when a subject that is being tracked around the frame stops moving, after a few seconds the camera decides it needs to look for something new to latch onto.
Jul 16, 2026 at 09:23 AM
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p.1 #11Focus Mode: One Shot vs Servo
Many years ago, back to my Elan7E film camera, I asked Canon rep. which modes best to use between One Shot, IA Focus, and IA Servo for different shooting scenarios. They advised me to just leave the camera in IA Servo and that's what I've done for any and all types of subjects with SLR's, DSLR's and now ML, without any problems or regrets.
Jul 16, 2026 at 09:35 AM
p.1 #12Focus Mode: One Shot vs Servo
rscheffler wrote:
Please clarify what you mean by 'wanders around too much' because back in the DSLR era, Canon's AI Servo mode used to oscillate focus a fair amount when used on stationary subjects, though it improved greatly with more recent DSLR models. Are you saying this is what you're seeing with your mirrorless cameras, too (not holding consistent focus on a static subject)? Or did you mean that subject recognition and tracking doesn't reliably stick to and the focus point is moving off the intended subject? If this, then I would be more likely to agree because it seems that at...Show more →
For example, when shooting product images, servo continuously focuses instead of locking, resulting in slightly different points of sharpness—not what I want. I normally disable subject and eye tracking for static subjects as it often focuses on the wrong detail (something brighter or closer). I just want to place a single AF square on the desired point of focus and have it lock, rather than searching and/or refocusing. When using a tripod, I often just use MF as it's faster to get what I want in focus, rather than forcing the camera not to automate.
Gochugogi wrote
Guess I'm the odd man out as I still use one-shot and single point much of the time on my R7 and R6 MK II, but then I'm mostly shooting static subjects like landscapes and macro. Servo wanders around too much and, thus, I reserve its use for more fleeting subjects like moving critters 'n bugs. I customized the AF-ON button to toggle between servo and one-shot.For example, when shooting product images, servo continuously focuses instead of locking, resulting in slightly different points of sharpness—not what I want. I normally disable subject and eye tracking for static subjects as it often focuses on the wrong detail (something brighter or closer). I just want to place a single AF square on the desired point of focus and have it lock, rather than searching and/or refocusing. When using a tripod, I often just use MF as it's faster to get what I want in focus, rather than forcing the camera not to automate.
Jul 16, 2026 at 11:53 AM
p.1 #13Focus Mode: One Shot vs Servo
Ok... so looks like I have to push that rock I'm under out of the way... maybe I have to put it in front of the "get off my grass" sign I honestly have no clue why it suddenly dawned on me - it's not like I didn't know the focus system was a different level on ML. While I have eye detect on, I've probably not come far enough from my prev body (5D2). I don't think I could have moved to general use servo on that 5D2 - it was fine but I think it would have had far more misses than I got from one shot.
Hey, I'm not doing focus and recompose so gota be a plus. Making the change and lets see how I go learning a new trick. Thx all...
I honestly have no clue why it suddenly dawned on me - it's not like I didn't know the focus system was a different level on ML. While I have eye detect on, I've probably not come far enough from my prev body (5D2). I don't think I could have moved to general use servo on that 5D2 - it was fine but I think it would have had far more misses than I got from one shot.Hey, I'm not doing focus and recompose so gota be a plus. Making the change and lets see how I go learning a new trick.
Thx all...Jul 16, 2026 at 03:08 PM
p.1 #14Focus Mode: One Shot vs Servo
I normally use one shot, but the most dynamic thing I usually shoot is a person's portrait, so it serves me well enough.
Jul 16, 2026 at 03:11 PM
p.1 #15Focus Mode: One Shot vs Servo
EB-1 wrote:
I always use servo with BBF for everything.
I've played with that in the past and it's just not working with my brain. Plus, my better half often grabs my camera, so it's hard to retrain two people at once.
PinholeR5 wrote:
I also use 100% electronic shutter. There are some drawbacks, but once I experienced silent shooting I decided to make the switch and haven't looked back.
I've moved completely to electronic first but not ready to use 100% electronic only. I do have it set on a custom setting with 3 frame +1.3/0/-1.3 to use in churches and alike - I like the silence in that sort of setting but it also allows a poor mans HDR in post which is sometimes really useful. With 40fps, the 3 frames almost always have zip movements between them.
I always use servo with BBF for everything.
I've played with that in the past and it's just not working with my brain. Plus, my better half often grabs my camera, so it's hard to retrain two people at once.
PinholeR5 wrote:
I also use 100% electronic shutter. There are some drawbacks, but once I experienced silent shooting I decided to make the switch and haven't looked back.
I've moved completely to electronic first but not ready to use 100% electronic only. I do have it set on a custom setting with 3 frame +1.3/0/-1.3 to use in churches and alike - I like the silence in that sort of setting but it also allows a poor mans HDR in post which is sometimes really useful. With 40fps, the 3 frames almost always have zip movements between them.
Jul 16, 2026 at 03:19 PM
p.1 #16Focus Mode: One Shot vs Servo
robstein wrote:
I've played with that in the past and it's just not working with my brain. Plus, my better half often grabs my camera, so it's hard to retrain two people at once.
Back in the late 90s I recall it was the only practical and quick way to avoid manually switching AF between single shot and continuous/servo.
EBH
EB-1 wrote
I always use servo with BBF for everything.Back in the late 90s I recall it was the only practical and quick way to avoid manually switching AF between single shot and continuous/servo.
EBH
Jul 16, 2026 at 04:28 PM
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p.1 #17Focus Mode: One Shot vs Servo
Using AF-C/Servo became the default for most new cameras years ago, at least when using subject detection, as there's really not much penalty to doing it that way.
Jul 16, 2026 at 04:45 PM
p.1 #18Focus Mode: One Shot vs Servo
Gochugogi wrote:
Please clarify what you mean by 'wanders around too much' because back in the DSLR era, Canon's AI Servo mode used to oscillate focus a fair amount when used on stationary subjects, though it improved greatly with more recent DSLR models. Are you saying this is what you're seeing with your mirrorless cameras, too (not holding consistent focus on a static subject)? Or did you mean that subject recognition and tracking doesn't reliably stick to and the focus point is moving off the intended subject? If this, then I would be more likely to agree because it seems that at least with Canon, when a subject that is being tracked around the frame stops moving, after a few seconds the camera decides it needs to look for something new to latch onto.For example, when shooting product images, servo continuously focuses instead of locking, resulting in slightly different points of sharpness—not what I want. I normally disable subject and eye tracking for static subjects as it often focuses on the wrong detail (something brighter or closer). I just want to place a single AF square on the desired point of focus and have it lock, rather than searching and/or refocusing. When using a tripod, I often just use MF as it's faster to get what I want in focus, rather than forcing the camera not to automate.
OK, thanks for the explanation and that makes sense. I find for such situations (static scenes), it's also very dependent on the size of the focus point. Generally I switch to spot point whereas for typical people/event coverage I use single point with four-point surround to initiate focus acquisition and then let subject/face/eye tracking take over if the situation benefits from it.
robstein wrote:
Ok... so looks like I have to push that rock I'm under out of the way... maybe I have to put it in front of the "get off my grass" sign I honestly have no clue why it suddenly dawned on me - it's not like I didn't know the focus system was a different level on ML. While I have eye detect on, I've probably not come far enough from my prev body (5D2). I don't think I could have moved to general use servo on that 5D2 - it was fine but I think it would have...Show more →
IMO 5DII was still in the era when AI Servo on static subjects could be unreliable. The camera thinking the subject should be moving and constantly oscillating the focus slightly. IIRC there were plenty of complaints about the 5DII's AF performance relative to the 1D series.
For mirrorless I find I prefer to have one back button set to 'old school' DSLR-style single point AF without subject detection/tracking and another back button assigned to the same but with subject detection/tracking enabled. Mirrorless AF performance and behavior is such now that focus via shutter release half-press is more viable than it used to be in part because of how well subject recognition and lock-on can work. It will pick up the eye(s) of your subject and hold focus on them even when there are obstructions between you and the subject that would have normally made 'dumb' DSLR AF immediately refocus on the nearer obstructions instead. That was the strength of BBF back then - you'd release the back button and AF would stop and not refocus while the shutter release was half or full pressed. DSLRs gradually became a bit more sophisticated so that you could assign how quickly the AF system would try to jump to or ignore a passing obstruction (sudden change in focus distance). But it wasn't 'smart' in that it actually recognized the intended subject and would stick with them. Here mirrorless is not perfect. That capability works best when the intended subject is unique in the image. IME it doesn't work well with things like team sports where many athletes in the composition might be wearing the same uniforms, helmets, etc. You still need to recognize the system's capabilities and weaknesses.
If you don't want to go back button AF activation, you can assign those buttons to toggled subject detection/tracking on/off so that you can still benefit from DSLR style non-subject tracking and mirrorless style subject tracking via half-pressing the shutter release. You can also assign the back buttons to lock/hold focus while pressed, etc.
rscheffler wrote
Gochugogi wrote
Guess I'm the odd man out as I still use one-shot and single point much of the time on my R7 and R6 MK II, but then I'm mostly shooting static subjects like landscapes and macro. Servo wanders around too much and, thus, I reserve its use for more fleeting subjects like moving critters 'n bugs. I customized the AF-ON button to toggle between servo and one-shot.OK, thanks for the explanation and that makes sense. I find for such situations (static scenes), it's also very dependent on the size of the focus point. Generally I switch to spot point whereas for typical people/event coverage I use single point with four-point surround to initiate focus acquisition and then let subject/face/eye tracking take over if the situation benefits from it.
robstein wrote:
Ok... so looks like I have to push that rock I'm under out of the way... maybe I have to put it in front of the "get off my grass" sign
I honestly have no clue why it suddenly dawned on me - it's not like I didn't know the focus system was a different level on ML. While I have eye detect on, I've probably not come far enough from my prev body (5D2). I don't think I could have moved to general use servo on that 5D2 - it was fine but I think it would have...Show more →IMO 5DII was still in the era when AI Servo on static subjects could be unreliable. The camera thinking the subject should be moving and constantly oscillating the focus slightly. IIRC there were plenty of complaints about the 5DII's AF performance relative to the 1D series.
For mirrorless I find I prefer to have one back button set to 'old school' DSLR-style single point AF without subject detection/tracking and another back button assigned to the same but with subject detection/tracking enabled. Mirrorless AF performance and behavior is such now that focus via shutter release half-press is more viable than it used to be in part because of how well subject recognition and lock-on can work. It will pick up the eye(s) of your subject and hold focus on them even when there are obstructions between you and the subject that would have normally made 'dumb' DSLR AF immediately refocus on the nearer obstructions instead. That was the strength of BBF back then - you'd release the back button and AF would stop and not refocus while the shutter release was half or full pressed. DSLRs gradually became a bit more sophisticated so that you could assign how quickly the AF system would try to jump to or ignore a passing obstruction (sudden change in focus distance). But it wasn't 'smart' in that it actually recognized the intended subject and would stick with them. Here mirrorless is not perfect. That capability works best when the intended subject is unique in the image. IME it doesn't work well with things like team sports where many athletes in the composition might be wearing the same uniforms, helmets, etc. You still need to recognize the system's capabilities and weaknesses.
If you don't want to go back button AF activation, you can assign those buttons to toggled subject detection/tracking on/off so that you can still benefit from DSLR style non-subject tracking and mirrorless style subject tracking via half-pressing the shutter release. You can also assign the back buttons to lock/hold focus while pressed, etc.
Jul 16, 2026 at 10:54 PM
p.1 #19Focus Mode: One Shot vs Servo
5D II had weak AF. The 1Ds III was already out for about a year prior. Unfortunately the cheapness of the 5D II effectively killed the 1Ds series since they both had the same resolution.
EBH
EBH
Jul 24, 2026 at 12:12 PM
p.1 #20Focus Mode: One Shot vs Servo
We all use what we are comfortable with. Back in the 7D days I found AI Servo next to useless so went to one shot centre point AF off the back button. I had the lens adjusted for very slight front focus and found that worked well for birds and moving subjects. Now with the R6 the huge improvements in AF mean that I use servo AF for everything off the shutter button set to low speed continuous.. Still use the mechanical shutter.
Jul 24, 2026 at 10:51 PM