Crapking said:but i missed the ZONE and 4 point expansion options.
briansquibb said:Crapking said:but i missed the ZONE and 4 point expansion options.
They are there on the 1D4 - I use expansion by default.
1D4 has:
- left/right expansion
- one point all round(9points)
- 18 point expansion
The 1D4 has a whole bunch of options around the AF and the AF points mostly (from memory) the same as the 7D plus a few extras.
Viggo said:No zone-af or spot-af on the mk4...
neuroanatomist said:Viggo said:No zone-af or spot-af on the mk4...
The 1D IV does have Spot AF, however, it's only available when using a supertele with a lens AF stop button. On the 7D, Spot AF is available with any lens.
Put another way, if you buy a FF camera but then have to crop all your images to 1.3x or 1.6x FoV, you're throwing away the IQ advantages of FF over the smaller sensors, and so you might as well just get the cheaper camera (from an IQ standpoint). Conversely, if you only need to crop a few of your images, the IQ with the FF will be a decided advantage. That might mean getting longer lenses to compensate for the loss of 1.3x crop...which suits Canon just fine...
revup67 said:Put another way, if you buy a FF camera but then have to crop all your images to 1.3x or 1.6x FoV, you're throwing away the IQ advantages of FF over the smaller sensors, and so you might as well just get the cheaper camera (from an IQ standpoint). Conversely, if you only need to crop a few of your images, the IQ with the FF will be a decided advantage. That might mean getting longer lenses to compensate for the loss of 1.3x crop...which suits Canon just fine...
Neuro - this was well stated -so true.
Like some of you, that Spot AF is a necessity for me as well. The 7D spoiled me on this and it's availability with all lenses. It's a must have. Does anyone have a tally as to which currently available Canon DSLR bodies have this feature on FF for all lenses?
Viggo said:briansquibb said:Crapking said:but i missed the ZONE and 4 point expansion options.
They are there on the 1D4 - I use expansion by default.
1D4 has:
- left/right expansion
- one point all round(9points)
- 18 point expansion
The 1D4 has a whole bunch of options around the AF and the AF points mostly (from memory) the same as the 7D plus a few extras.
No zone-af or spot-af on the mk4... The X will get the same layout , Q-button, as the 7d..
briansquibb said:- AF expansion - 3 options here
* left/right - 2 points, used typically for panning
* surrounding - 7 points. (7D only uses 5 in the centre, 4 at the edges)
* 6 above and below and three each side of the selected, 19 points (equivalent in the 7D zoning which uses just 9 points in the centre or 5 points top,bottom,left and right ) The 1D4 version of zoning is far better off centre
neuroanatomist said:briansquibb said:- AF expansion - 3 options here
* left/right - 2 points, used typically for panning
* surrounding - 7 points. (7D only uses 5 in the centre, 4 at the edges)
* 6 above and below and three each side of the selected, 19 points (equivalent in the 7D zoning which uses just 9 points in the centre or 5 points top,bottom,left and right ) The 1D4 version of zoning is far better off centre
Just to clarify your clarification that's not how Zone AF works. Expansion (whether 2 points, 7 points, or 19/45 points) means it uses your manally selected single point, and the additional expansion points are used only if the subject moves away from the manually selected point, or if the manually selected point cannot achieve a focus lock.
Zone AF is similar to fully automatic AF point selection, in that the camera will select the AF point on the closest subject, but Zone AF restricts that automatic selection to a specific region of the field of view.
The 1D X will have Zone AF like the 7D, and also two expansion options (4 points in a 'plus' shape or all 8 surrounding points).
briansquibb said:It would be interesting to know how people use the various AF options. I would be interested to know if the AF point on the 1D4 are the same size as the 7D or whether, as I suspect, they are smaller.