C-AF fact vs myth?

...and there is your quandary. If C-AF is your main work, DSLR's is what you need for now. M43rds doesn't cut it yet.
Based on three and a half year old camera?
And despite what people are actually doing with the camera. I won't claim to know how it measures up to a camera I have no intention of owning. I can say that it seems to perform at least as well as the last DSLR I owned (Nikon D5000). If I were still using Nikons, I'd probably have one of the descendants of that camera. I don't think it would do a better job than the E-M1 for amateur sports and I find M43rds a lot more useful for nearly everything else I shoot.

The biggest difference is that I own a much higher quality group of lenses, because, if you shop around, you can get good deals and they are much smaller. I have the 12-40 Pro and 40-150 Pro, plus a small set of nice primes and the 1.4 teleconverter. With the one stop difference between M43 and APS C, Nikon just doesn't have the equivalent F4 long zoom.
Let me correct one thing, I didn't realize that Nikon how has a 70-200 F4 zoom. It was released after I made the switch to M43.
 
I do not know how to reply. I do not know why to use C-AF - as an ignorant person, I never use it.

Recently I've traveled a little through AL and BC, and I took some, I guess similar to your request, photos. Of course, my photos are rather snaps, but I never felt deficiency of S-AF with small AF box. Here is a sample taken in Calgary (I have more of the same), and I firmly believe that you will do much better after few trials.

2fcc01a86e814a45ac5b1732b71fc342.jpg

--
Camera in bag tends to stay in bag...
 
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...and there is your quandary. If C-AF is your main work, DSLR's is what you need for now. M43rds doesn't cut it yet.
Based on three and a half year old camera?
No.

I have access to most cameras that come on the market.

The ones you see on my gear list are the ones i liked and paid for. ;-)
 
IBIS- ON or OFF?
If the goal is to maintain high-enough shutter speeds as to freeze action, I would disable IBIS. That being said, I can't really say I've run into problems by leaving it active. If in your shooting situation you are more dependent on panning with a slower shutter speed I would consider its use more seriously.
-If I am using a super-tele (which readily increases camera shake) I think it may be prudent to leave IBIS on (Auto S1 or AUTO 1 [panning]).
Just have to try for your shooting conditions.
In my limited experience shooting BIF and DIF (dogs in flight) IS end up blurring images at shutter speeds above about 1/500.
 
Settings that most agree on;

9 point AF box

-on other sites there are a lot of folks using single point.
This is because the E-M1 is completely brainless regarding subject recognition. The point to the 9-box mode is supposed to be it could use any of the 9, but that exposes the fact that the E-M1 has absolutely no subject recognition outside of the amazingly-effective face-detect mode. It has no means to choose between the 9 options, and thus you are better of in the single-point mode. Of course it's pretty difficult to hold that single box on your target long enough to get the shot, which is why I rate the E-M1's C-AF as almost useless, regardless of how it appears on a spec-sheet or how 'fast' it is.
It's not that bad Steve. I had a very high success rate (80-90 %) last winter on the few occasions I went out. I simply dredged the web for some common C-AF settings and applied them to my camera. All luck Yes. *I was extra lucky to have lots of light though. I used C-AF and C-AF+T with H and L burst rate no difference....high success rate for each.

Wow...that was easy I thought. I was made to wonder what all the C-AF fuss/complaining was about.

This winter things were not the same so far. First day was Sunny but I did not have the camera set right plus user error. wrong settings and I inadvertently moved my 9 point box well off from center. I normally do not wear gloves but I did this day.

Second day I thought there was too much time wasted culling/deleting OoF images from previous day so I used L burst rate. It was then that I noticed my 9 point box was not centered. Results were a little better but not good. it was completely over cast. From the two days I never got anything near what I got last year. Last year was a fluke so now I am trying to make sure i got my ducks in a row and understand what, how, and when to do instead of simply applying other's setting.

I was now wondering 'what the heck am I doing wrong now?

After doing another more in-depth round of web dredging I re-visited my camera's settings and found the C-AF lock on High. I am only guessing I did that by mistake or a f/w update did it. I think the High C-AF lock setting was the cause of my low success rate this time around. To be honest I have no idea what that setting was last year.
Actually, your experiences here illustrate the problem that is driving me - and I am sure many others- crazy. The sheer, mutli-layer complexity of the menu system and almost endless configuration options make it very difficult to be sure one has everything set up right and FAR too easy to mess up by inadvertently changing one or more of them.

I note that even Friedman, whose book is quite good, gives up at a certain point (the little lever that also drove Wrotniak crazy).
 
...and there is your quandary. If C-AF is your main work, DSLR's is what you need for now. M43rds doesn't cut it yet.
I suspect that you are wrong about the with the EM1ll. There are some examples of very good CAF on line now.

And apparently even tracking now works quite well. The manager of the last surviving photo store in Saskatoon (a city of almost 250,000 that once had four) and his wife are talented nature photographers. He just started using the three EM1ll's he bought for the two of them and confirms what you say about the AF. And also that the tracking is excellent. Perhaps not quite up to Nikon's latest, but very usable
 
Settings that most agree on;

9 point AF box

-on other sites there are a lot of folks using single point.
This is because the E-M1 is completely brainless regarding subject recognition. The point to the 9-box mode is supposed to be it could use any of the 9, but that exposes the fact that the E-M1 has absolutely no subject recognition outside of the amazingly-effective face-detect mode. It has no means to choose between the 9 options, and thus you are better of in the single-point mode. Of course it's pretty difficult to hold that single box on your target long enough to get the shot, which is why I rate the E-M1's C-AF as almost useless, regardless of how it appears on a spec-sheet or how 'fast' it is.
It's not that bad Steve. I had a very high success rate (80-90 %) last winter on the few occasions I went out. I simply dredged the web for some common C-AF settings and applied them to my camera. All luck Yes. *I was extra lucky to have lots of light though. I used C-AF and C-AF+T with H and L burst rate no difference....high success rate for each.

Wow...that was easy I thought. I was made to wonder what all the C-AF fuss/complaining was about.

This winter things were not the same so far. First day was Sunny but I did not have the camera set right plus user error. wrong settings and I inadvertently moved my 9 point box well off from center. I normally do not wear gloves but I did this day.

Second day I thought there was too much time wasted culling/deleting OoF images from previous day so I used L burst rate. It was then that I noticed my 9 point box was not centered. Results were a little better but not good. it was completely over cast. From the two days I never got anything near what I got last year. Last year was a fluke so now I am trying to make sure i got my ducks in a row and understand what, how, and when to do instead of simply applying other's setting.

I was now wondering 'what the heck am I doing wrong now?

After doing another more in-depth round of web dredging I re-visited my camera's settings and found the C-AF lock on High. I am only guessing I did that by mistake or a f/w update did it. I think the High C-AF lock setting was the cause of my low success rate this time around. To be honest I have no idea what that setting was last year.
Actually, your experiences here illustrate the problem that is driving me - and I am sure many others- crazy. The sheer, mutli-layer complexity of the menu system and almost endless configuration options make it very difficult to be sure one has everything set up right and FAR too easy to mess up by inadvertently changing one or more of them.
Yep...it's (C-AF) taking some that's for sure but I think when I come out of this tunnel I'll be at the right end (or at least close enough to it) ;)
I note that even Friedman, whose book is quite good, gives up at a certain point (the little lever that also drove Wrotniak crazy).

--
erichK
saskatoon, canada
Photography is a small voice, at best, but sometimes one photograph, or a group of them, can lure our sense of awareness.
- W. Eugene Smith, Dec 30, 1918 to Oct 15, 1978.
http://erichk.zenfolio.com/
http://www.fototime.com/inv/7F3D846BCD301F3
underwater photos:
http://www.scubaboard.com/gallery/showgallery.php/cat/500/ppuser/5567
 
again for your time and your thoughts about the theory of C-AF. what a trip.

I'm sure I can get out 'there' now with confidence to set up the camera accordingly and knowingly.

Fun ;)
 
i read there was certain condition(s) where the PDAF outling did show in the display i just do not recall what the conditions are right now.
It displays as a fine black frame and shows de facto when a 4/3 lens is mounted and IIRC in C-AF + high burst when an m4/3 lens is mounted, although I'd have to double-check that last bit.
i was reading threads from all ages of the EM1 and dealing with EM1 w/m4/3 and EM1 w/4/3 lenses. a jungle of info.

i've learned there are exif tools that show (X,Y, axis points) what AF point was used to capture and whether or not AF was ON or OFF for capture. there is a fella who posted what all the points were regarding the AF points on screen.
I'd love to have easy access to this info for QA/QC efforts after each shoot. Knowing where the camera focused (chain-link fence!) every time would be a huge help.
info on front page of this thread

https://e-group.uk.net/forum/showthread.php?t=41804

and table of RAW EXIF PDAF and CDAF points here

http://e-group.uk.net/forum/showthread.php?t=33943&highlight=focus+points

not my work just stumbled upon it.
I understood C-AF Lock as being...how long the camera will ignore any distractions.

the higher the setting the longer the camera will ingor (stay locked on at current distance).

So as my sonny boy is coming towards me the focus(distance updating) does not want to change/update as quickly as it should have.
It's the opposite (check the camera's popup menu when selecting focus lock). "Low" is the stickiest setting and "high" moves off it the quickest. High tracks more accurately. Oly's documentation here is very poor.
Now I'm confused again...but at least I know what the variables are and which ones to experiment with now.

this is clipped from Friedmans guide "

"Lots of people walk in front of you from time to time, causing your camera’s focus tracking to become distracted. What you really want is for the camera to try to track the moving subjects in the parade, and to not be distracted if something appears in front of your camera briefly. That’s what this setting is for. When set to High, the camera will wait about 2 seconds before trying to refocus onto something a drastically different distance away."

Seems to me that Gary is suggesting that the High setting equates to a longer period of time before refocusing?

also


"Off would mean it will jump focus more easily. Low would mean it will hesitate before jumping. High would give you the most lag before the jump.

It doesn't make focus lock in C-AF any faster, it just means the focus won't jump as easily to something briefly coming between you and the subject once you have focus lock."

I'll be checking out the MENU bubble too.
And, some pics.

31011803771_fbb4dda07a_o.jpg


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31011802271_56706e4f66_o.jpg


31011805221_6b3ae689fa_o.jpg
great pics. I've admired them before too.

Thanks Rick.
Cheers,

Rick

--
Equivalence and diffraction-free since 2009.
You can be too; ask about our 12-step program.
 
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using the static blue player on the sideline as a reference marker it seems that the distance from camera to subject did not change much. Especially if you are a good distance away on the other side of the field. Your subjects are filling the frame quite nicely. Lots of light too. I would think that camera should have an easy time with this situation. Good images nonetheless.
I think you are underestimating the distance traveled a bit. In addition, the sequence is less than 2 seconds. If they travel 10 feet in those 2 seconds, they are moving at 3.4 mph.
it's possible...

I guessed that you were positioned across the field and not actually on the field.

If the players are moving down the sidelines and across the field from your position then they are only closing a small amount of head on distance compared to the much greater lateral distance.
Here is another sequence of a player running pretty much directly at me. I finally lose him in the last frame because he is outside the 9 box focus points. These were shot at 5:45 PM on October 22nd in Northern VA on overcast day (there are very little shadows). I used ISO 1000 with F2.8 and 1/1250. They were at 150mm. I had the E-M1 for just a couple of weeks at this point. I had shot my first game with it only a week earlier.
now these are excellent and I do remember seeing these shots before. purple player is definitely closing distance on camera at a much higher rate since camera is on same side of field and there is much less lateral distance to aid the camera. the camera(you) is working admirably in my opinion.

6fb6d5038a1c48648c9fa3aff2332c12.jpg

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What kind of results are you getting? Are the conditions a lot different that this?
 
I do not know how to reply. I do not know why to use C-AF - as an ignorant person, I never use it.

Recently I've traveled a little through AL and BC, and I took some, I guess similar to your request, photos. Of course, my photos are rather snaps, but I never felt deficiency of S-AF with small AF box. Here is a sample taken in Calgary (I have more of the same), and I firmly believe that you will do much better after few trials.
Hi Simon,

I'm usually a S-AF (or full manual focus/old vintage lenses) shooter too and I never have had issues/complaints with Oly's S-AF with any of my many Oly bodies.

I simply want to use C-AF once in while and to have some consistent results. So far any good results have been a fluke more or less so...I decided to attempt C-AF enlightenment.
2fcc01a86e814a45ac5b1732b71fc342.jpg

--
Camera in bag tends to stay in bag...
 
Hi, Paul.

I've been shooting soccer with the 50-200 SWD. I use a combination of back button focus with C-AF, and S-AF, depending on my location on the field, player location, and distance to the players.

In my experience, C-AF works best when the action is relatively close, or when shooting diagonally across the field at farther distances, without the stadium background. Since I shoot mostly in portrait orientation, the C-AF will always want to grab the horizontal lines of the stadium seating. And at longer distances with more players cluttering the view, the C-AF is less effective.

Now good light really makes a difference, but during night games I try to keep the action close, with clean backgrounds with C-AF. I rarely take any across the field shots regardless of light or type of focus.....the exception being corner kicks, or action around the goal. I am interested to see the improvement of the Mark 2.

You did ask for settings, so 9 point grid, IBIS off (use monopod), release priority ON, shutter release lag SHORT, EVF frame rate HIGH, REC View OFF.

Paul
 
now these are excellent and I do remember seeing these shots before. purple player is definitely closing distance on camera at a much higher rate since camera is on same side of field and there is much less lateral distance to aid the camera. the camera(you) is working admirably in my opinion.
A couple other words of encouragement. I had previously (starting almost 12 years ago) shot with Nikon low-end DSLRs (D70, D5000). In 2011, I was in between sons playing soccer (they are 9 years apart) and was using my D5000 less and less. I was often using a compact P&S digital camera. It was then that I decided to try M43, starting with a GF3. Soon, I was not using the D5000 at all and decided to switch to M43 fully with the purchase of a G3. Interestingly, it was the first time that I had ever owned two interchangeable lens cameras at the same time. From that point forward, I have owned a small camera (GF3, GX1, E-P5) and a larger camera with EVF (G3, E-M10, E-M1).

Once my younger son began playing more serious soccer in 2012, I realized that I needed to change the AF-S and time my shots more. It wasn't ideal but I was able to get some shots and I stayed with M43. Once I got the E-M1, it was back to the AF-C and I can say that I have been extremely happy.

Here is a portion of a sequence (first few and the last) from the first game I shot with the E-M1, just 1 week after buying a used one in London. It was a spur of the moment purchase because of the price ($580 US) and condition (less than 600 shutter clicks). I can say that shooting with the E-M1 feels just like shooting with a D5000 class DSLR.

I am confident that with a bit of practice, anyone can achieve the same results. I stumbled upon the settings (on this forum), and was lucky to have a set that worked for me right away.



80edb41b8fb6440896ab2b27fccc5173.jpg



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c949be32e15f401a9aa5d7ea2e00e95e.jpg



7f9f6a8892024518b1cdba7b8297a4ea.jpg
 
Hi, Paul.

I've been shooting soccer with the 50-200 SWD. I use a combination of back button focus with C-AF, and S-AF, depending on my location on the field, player location, and distance to the players.

In my experience, C-AF works best when the action is relatively close, or when shooting diagonally across the field at farther distances, without the stadium background. Since I shoot mostly in portrait orientation, the C-AF will always want to grab the horizontal lines of the stadium seating. And at longer distances with more players cluttering the view, the C-AF is less effective.

Now good light really makes a difference, but during night games I try to keep the action close, with clean backgrounds with C-AF. I rarely take any across the field shots regardless of light or type of focus.....the exception being corner kicks, or action around the goal. I am interested to see the improvement of the Mark 2.
Mark2 is dogging my brain waves. This is why I want to get as best I can with Mk1 to determine if I can be perfectly satisfied with Mark1 or do I "need" mk2. if I can happily keep on trucking with the mk1 then I can add some glass instead (the 12-100/4, 25/1.2 are seriously tempting bits of gear).
You did ask for settings, so 9 point grid, IBIS off (use monopod), release priority ON, shutter release lag SHORT, EVF frame rate HIGH, REC View OFF.
Thanks again.
 
now these are excellent and I do remember seeing these shots before. purple player is definitely closing distance on camera at a much higher rate since camera is on same side of field and there is much less lateral distance to aid the camera. the camera(you) is working admirably in my opinion.
A couple other words of encouragement. I had previously (starting almost 12 years ago) shot with Nikon low-end DSLRs (D70, D5000). In 2011, I was in between sons playing soccer (they are 9 years apart) and was using my D5000 less and less. I was often using a compact P&S digital camera. It was then that I decided to try M43, starting with a GF3. Soon, I was not using the D5000 at all and decided to switch to M43 fully with the purchase of a G3. Interestingly, it was the first time that I had ever owned two interchangeable lens cameras at the same time. From that point forward, I have owned a small camera (GF3, GX1, E-P5) and a larger camera with EVF (G3, E-M10, E-M1).

Once my younger son began playing more serious soccer in 2012, I realized that I needed to change the AF-S and time my shots more. It wasn't ideal but I was able to get some shots and I stayed with M43. Once I got the E-M1, it was back to the AF-C and I can say that I have been extremely happy.

Here is a portion of a sequence (first few and the last) from the first game I shot with the E-M1, just 1 week after buying a used one in London. It was a spur of the moment purchase because of the price ($580 US) and condition (less than 600 shutter clicks). I can say that shooting with the E-M1 feels just like shooting with a D5000 class DSLR.

I am confident that with a bit of practice, anyone can achieve the same results. I stumbled upon the settings (on this forum), and was lucky to have a set that worked for me right away.

80edb41b8fb6440896ab2b27fccc5173.jpg

ead0bb521ca346a68cbfb4dd7ef30477.jpg

c949be32e15f401a9aa5d7ea2e00e95e.jpg

7f9f6a8892024518b1cdba7b8297a4ea.jpg
thanks again for your time and thoughts. great camera work.

the facilities your kids play on WOW they must feel like Champs playing on that field.
 
thanks again for your time and thoughts. great camera work.

the facilities your kids play on WOW they must feel like Champs playing on that field.
We are very lucky to have great facilities. We also belong to a very good club. The club has good coaching and best of all opportunities for players at all levels. There is a good blend of playing to win with a focus on player development and good sportsmanship. My son joined an established team as a first time travel player at 12 years old. He was treated extremely fairly with the playing time and coaching needed to advance and a year later he was the team's leading scorer.
 
C-AF fact vs myth?

Settings that most agree on;

9 point AF box
Most users will get better results with the 9 point AF box. The exception, if you are photographing things like hummingbirds, hummingbird moths. or bees eating from flowers, then use the small single point focus box or you will have mostly flowers and leaves in focus and not the bird/moth/bee.
C-AF with single, 9 point, or all points...pretty much holds the same with S-af.
-one interesting tid-bit I read is that while shooting a burst it is only “THAT” one focus point that actually locked up the subject that will ‘update/refocus’ the AF during the shooting of the burst. Meaning if the user does not keep that one particular AF point ON the subject throughout the entire sequence the subject will not be kept in focus.
I am not sure how one would know that, since the focus points are not shown after the first frames. I am fairly certain that is not true with all points, since I regularly used that for single targets against a homogeneous background (sky) and it definitely maintained focus as long as the target was within the frame and had sufficient vertical height.
i was reading threads from all ages of the EM1 and dealing with EM1 w/m4/3 and EM1 w/4/3 lenses. a jungle of info.

i've learned there are exif tools that show (X,Y, axis points) what AF point was used to capture and whether or not AF was ON or OFF for capture. there is a fella who posted what all the points were regarding the AF points on screen.

info on front page of this thread

https://e-group.uk.net/forum/showthread.php?t=41804

and table of RAW EXIF PDAF and CDAF points here

http://e-group.uk.net/forum/showthread.php?t=33943&highlight=focus+points

not my work just stumbled upon it.
C-AF Lock – on (from a choice of Off, Low, Normal, High)

-I now understand what C-AF lock is and it helps explain why my last C-AF outing was quite terrible. The camera was set to HIGH and my son was sledding, at an oblique angle, towards me then past me. I should have set Lock to OFF or Low.
If you have difficulty keeping the focus point on the target or if the target is likely to move behind anything or be momentarily blocked from view, then use the C-AF Lock.
Face Detection- OFF

-I agree but I might turn it on sometimes, compromising speed somewhat, just to help the camera get the face in focus and not simply any part of the subject’s body/torso.

C-AF Release priority – OFF

-I agree. The camera must have focus before releasing shutter I have plenty enough OoF frames as it is.
The E-M1.1 is slow to confirm focus and release the shutter. With Release Priority set to off, you are unlikely to be able to photograph things that move quickly (swallows, bats, flying bees). because the shutter will never release, even though the camera is capable of obtaining and maintaining focus.
yes, one setting i'll be adjusting often at the start of my 'practical' now that I now what it is and what it does.
-some say with Release ON you’ll of course get more blurred images but you’ll also get more hits.

-Some say that when using when using a 4/3 lens use OFF no matter what as ON slows ”chokes” the EM1 with a 4/3 lens mounted
The only FTs lens I used with CAF was the 50-200 SWD with and without the EC14. I have over 150,000 images with CAF all with Release Priority set to On. The 50-200 is slower to obtain focus lock (much faster on the Mk II), but will it maintain CAF focus quite well once it obtains focus. If you manually pre-focus (easy with the SWD mechanically linked focus) to just beyond correct focus and then half press the shutter for auto focus (the lens focuses down so focus beyond the target) the lens focuses quickly. I can lock focus with the EC14+50-200 SWD with manual pre-focus about as quickly as I can with the 300mm f4.
I have the 50-200 which is my longest AF lens and I still use it at times so this is good to know.
Other settings I couldn’t tell one way or the other what the consensus was;

IBIS- ON or OFF?
Given the processor, it is probably better with it Off with CAF, if you can use a long telephoto that way.
I guess same as S-AF it will depend on what shutter speeds I have to use IBSI or not.
-If I am using a super-tele (which readily increases camera shake) I think it may be prudent to leave IBIS on (Auto S1 or AUTO 1 [panning]).

Shutter Release Lag- Normal, Short.

-Seems short would be the answer (at a cost of extra battery power) but does it save time at the initial shutter press only?
I always left it off after I found no real difference in success rates.
EVF Frame rate- High, normal
I used high on the E-M1.1, since it showed fewer artifacts with fast movements than set to Normal (set with Myset for BIFs).
the one issue with High is that Focus Peaking is no longer available. I have M focus assigned to my AEL/AFL button. one press puts camera into manual focus with active peaking. another press puts camera back into whatever mode it was in before. very handy.

choices.
-Does EVF frame even affect the C-AF speed?

Vivid scene mode-

-some swear using vivid scene mode improves C-AF speed. I am going to write/explain as best as I can recall/understand it…please forgive me if I have it messed up terribly…They state that the AF system uses a JPEG image and the Vivid scene mode has more punch and contrast. Gary Friedman also stated that the EM1’s C-AF tracking relied on color contrast so it seems to me there might be ‘something’ there.

Record View- On/Off.

-I guess OFF to have a better chance of seeing/tracking the actual “live” subject in the EVF/LCD

WB- use a preset white balance

-I am guessing that WB along with Exposure is set at initial shutter release of burst but just in case I think I’ll use presets with C-AF.
With Low Sequential focus and exposure (and I assume White balance) are adjusted between frames and you get Live View. With High Sequential you get focus between frames on the E-M1.1, but the view is the previous image and not live view.
That’s all I can think of for now.
--
drj3
 
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