They wereĬoncerned that they were not going to get the necessary depth of field for close up shots etc as with the f22 setting on DSLR cameras. There have been a few recent comments on my Youtube channel from new users to the FZ200 camera concerned that the FZ200 only has an aperture minimum of F8 in stills and F11 in video. Stopping right in front of me where I was clearly photographing the race! I would only shoot JPEG if I was to use high speed burst mode again and I also learned that spectators can be so indifferent to photographers. So what did I learn from today? AI focus isn't that fast with some of my lenses and using just On the way down the runners wereįront lit with full sunshine which created strong contrast but allowed 1/2000 sec shutter speeds. On the way up the runners were strongly backlit so exposure was based on the shadow side and -1/3 EV and I just left the highlights to the mercy of the light. I lost a few critical shots during this period. Shutter button until the buffer started to empty. I also was using burst mode and shooting RAW plus JPEG and found the camera buffer quickly filled leaving me an unresponsive My instinct would have to have used manualįocus and a focus marker at a point where the runners would cross. I had limited success using this mode as on quite a lot of images I missed the subject with this single point. Most of what I have read would suggest using just one central focus point and using the AI servo mode for this kind of work. I decided to try out some action photography to understand more fully the relationship of AI servo focus mode on Canon DSLR's. The course record was set in 1981 and still stands by J Wild in 15mins 53 seconds. The winning time this year 17min 18 second by number 169 Bob Hope. A gruelling run, distance: 5.2km / 3.2mĬlimb: 213m / 699 ft. This rule for full f stops only requires that you can double, or half, a number.Įaster Saturday sees the annual Rivington Pike fell race. There is a way to calculate the 1/2 and 1/3 stop values however you can't do this in your head! Stops then 2 stops gives f8 (divide by 2) and 2 more gives f4 (again dividing by 2) ( or divide by 4 but half and half again might be easier for some) So for example if you are at an aperture value of f16 and want to open the aperture by 4 It's the same with the f1.4 two stops smaller is f2.8 (double the number), two stops smaller is So you can see how the sequence works.Įach step in the progression is 1 F stop, either bigger moving to the left or smaller moving to So begin with F1.0, two stops smaller is F2.0 (double the number), two more stops is F4 (double You only need to remember the F1.0 and F1.4 values. This gives a geometric scale of f1.0 f1.4 f2.0 f2.8 The F stops (full increment not 1/2 or 1/3 rd) are based upon a geometric incremented pattern based upon the powers of the square root of 2 If you are new to cameras (digital or film) and find the F stop notation difficult to understand, or remember, then this little explanation might help.
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