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I have read that the Mk 1 refocuses at 3fps but not at 8fps
I don't know where you read that, but it's ballcocks.
I have read that the Mk 1 refocuses at 3fps but not at 8fps
Have recently been tempted by the 400 F5.6 L - seems to be a great lens at an incredible price compared with the other 400+ lenses out there that are just one stop faster. I am thinking that as the sensors improve (e.g. 7Dii versus 7D) that one stop higher ISO might be tolerable, and I guess I don't have several £k to spend on a white supertele. Anyone have anything good or bad to say about this lens on a 7Dii?
Is that "ballcocks" as in "it re-focuses on every frame", "it doesn't re-focus at all" or none of the above? Just curious ...I don't know where you read that, but it's ballcocks.
Is that "ballcocks" as in "it re-focuses on every frame", "it doesn't re-focus at all" or none of the above? Just curious ...
Thanks Toggerman, that's more like the sort of reply I was expectingThe 7DMkI focuses between each frame at 8fps, the 7DMkII achieves 10fps also with full autofocus between shots.
Do you have a reliable source for that info?The 7DMkI focuses between each frame at 8fps, the 7DMkII achieves 10fps also with full autofocus between shots.
Do you have a reliable source for that info?
Bob
The 7DMkI focuses between each frame at 8fps, the 7DMkII achieves 10fps also with full autofocus between shots.
Thanks, Gaz, that's the kind of info I'm after....will try at the weekend and report!!On the battery front. Went out this morning with 2 batteries 100%. After 150 shots one was showing 84% and 80 frames and the other was showing 88% and 70 frames.
I think that this highlights tracking rather than focusing.....two quite different parts of the equation.I've just thought of an experiment for this. Make sure you have AF point display set to on in the image review menu. Set the camera to high speed, AI-Servo, all points active with the centre point as the start. Find a large static object with a fairly decent repeating pattern with plenty of contrast (I just used my wooden shed, lots of grain). Lock focus onto the object and then fire away whilst moving the camera around a bit. Review the photos on the back of the camera and see how the focus points change. I tried it just now and in each photo different AF points were selected, which means that the AF system was working in between each shot.
I don't have the answers but I do suspect that there isn't "full automatic focus between shots" when the drive speed is performing at the maximum.
I suspect that tracking is initiated using the AF arrays but subsequent shots in a burst will also perform image comparison by looking for similar tonal regions (as before, based on a snippet given away in an official source)..... Subject tracking still has to use the AF sensor and processors, just like it does in any other situation.
I think that we need to separate focusing and tracking to avoid confusion....they are two entirely different things although the information gained by one would certainly be useful to the other.Predictive AF I imagine will take a priority over the AF sensor "seeing" the object to a certain degree, but then I also wonder if it is the level of prediction that is changed with the Tracking Sensitivity adjustment setting.
I think that the prediction involves commanding the lens focus motor move immediately after the shutter closes (during the mirror return) and before the AF sensors are seeing the subject. Lens motor moves are quite a slow event in the cycle and initiating a change before the calculation makes sense (this is the prediction) following which there's a short time to read the sensors before the mirror lifts again (this is AF calculation). If the prediction was good then there's no need to command a further move and if it was wrong then you'd get a soft ('ish) image and the updated position would be ready for the following shot. The various AF cases in the newer bodies probably give more of less "weight" to the factors available.It shouldn't predict too far ahead if it's expecting a subject change at any point, likewise if it's supposed to stay locked on it needs to do so even if it can't see the subject momentarily.
Of course you can change the subject drastically (such as if I suddenly pointed the camera from my shed up to the sky mid burst) and the AF system will still do it's best, but then you're limited by the speed of the lens' motor.
To be honest I don't have anything to hand right now. However I've shot motorsport/aviation/kids running around for ~3 years with a 7D pretty much always set at 8fps, and so far I've done about 50k images with my 7DII, mostly motorsport and football set at 10fps, if it didn't adjust focus between shots I would have a lot more out of focus images, especially when the object is heading directly toward me.
In AIservo, the shutter will release whether or not focus has been achieved and irrespective of the priority. The only difference that release priority has over focus priority is the time dedicated to the event. In focus priority (bias) there is a little more time given over to focusing at the expense of a reduction in drive speed but it will release the shutter. Focus priority in "One Shot" will not release the shutter until focus has been achieved (or deemed to have been achieved).Toggermans test is a good one. Doing this with release priority set to focus and the camera does pause between shots as it knows it lost focus and has to re-acquire (depending on tracking sensitivity)
So Peter; yes, it does try to focus between shots in a burst.
In AIservo, the shutter will release whether or not focus has been achieved and irrespective of the priority. The only difference that release priority has over focus priority is the time dedicated to the event.
I think that the prediction involves commanding the lens focus motor move immediately after the shutter closes (during the mirror return) and before the AF sensors are seeing the subject. Lens motor moves are quite a slow event in the cycle and initiating a change before the calculation makes sense (this is the prediction) following which there's a short time to read the sensors before the mirror lifts again (this is AF calculation).
Chuck Westfall said:Canon introduced iTR AF with the EOS-1D X in 2011. This system takes advantage of the camera’s 100,000 pixel RGB metering sensor to supply face detection and color data to the AF processor. When the 1D X is set for either Zone AF or automatic AF point selection using all 61 AF points and the iTR AF system is engaged, the camera’s AF processor cross-references face detection and color data to the phase detection AF data. This enhances the camera’s ability to track subject movement within the active AF area. iTR AF is effective for both One-Shot AF and AI Servo AF.
In AIservo, the shutter will release whether or not focus has been achieved and irrespective of the priority. The only difference that release priority has over focus priority is the time dedicated to the event. In focus priority (bias) there is a little more time given over to focusing at the expense of a reduction in drive speed but it will release the shutter. Focus priority in "One Shot" will not release the shutter until focus has been achieved (or deemed to have been achieved).
Bob
Not true. I quite often shoot the sky with a small aperture whilst shooting a day of motorsport, just to check for dust (I absolutely hate dust). My C1 setting on my 7DII is set for motorsport and used to have it set to focus priority for both 1st and 2nd shots, when I forget to change to AV mode to check for dust the camera wouldn't fire.
Experiment #2: Set the camera to AI-Servo, spot or single point focus and any continuous drive mode. Set the 1st image priority to focus, aim at a blue patch of sky and press the shutter button. Then change the 1st image priority back to the middle and adjust the 2nd image priority to focus. Aim at an object (I used my shed again) and start shooting, move the camera up to the sky whilst still shooting. Mine stopped dead and the focus indicator started flashing the circle in the bottom right of the viewfinder. Happens the same on my 1DX too.
You may be correct but I believe that it is the metering sensor that tracks and tells the AF system which sensor array to use to keep the subject in focus.the camera’s AF processor cross-references face detection and color data to the phase detection AF data. This enhances the camera’s ability to track subject movement within the active AF area
Doesn't that infer that it does use the AF system to track a subject?
Just ordered mine too, from Panamoz. Their ETA is 26 May, so let's see how things go.Well the deed has been done, I have just ordered a Canon 7D Mark II to use as a Wildlife Camera using it along with a Canon 500mm f/4 IS II I picked up yesterday, Will be a interested period as I will be using that setup for Wildlife and the remainder of my Nikon gear (D800, 16-35mm & 70-200mm f/2.8VRII) That will be used for Landscape photography.
Anyone using a generic battery grip for the 7D Mark II? If so what make and how do you find it? I would consider getting the Canon official one but the price is too much of a rip off IMHO.
....After quite a few months without a battery grip I bought the Canon one, primarily because it has a magnesium body and matching durability and weatherproofing to the 7D2 body and also for peace of mind re electronics and controls. I bought mine from HDEW (who have premises in Kent) for £195 incl vat and delivery.
My biggest lens is the Canon 100-400mm L II (smaller and lighter than your 500mm F/4 L II) and I find that the grip makes the whole a lot easier to handle - I now only attach it to my BlackRapid strap when I need to either change lens or be both hands free. I'm still not that steady with it on portrait format shots though but am getting better with it - It's taking time because I mostly shoot landscape format.
I bought mine from HDEW (who have premises in Kent)
Thanks, Gaz, that's the kind of info I'm after....will try at the weekend and report!!
2. When using manual mode for shutter and aperture with auto ISO, had strange fluctuations in ISO selected by the camera. Even had one test with 2 shot burst of a rider where 1st shot was at ISO 160 and 2nd shot was at ISO 800 thereby completely blowing the shot out.
Just ordered mine too, from Panamoz. Their ETA is 26 May, so let's see how things go.
Getting excited!
Had one delivered today and have what seems to be a rattle from around the pop up flash area when rocked from side to side.Anyone else can't see any damage to box,and no obvious damage to see.
Thanks just removed eyepiece (yes it is loose)butMy money will be on the eye piece as mine rattle there as it is not a tight fit... Seen it mentioned by others as well.