AF points (7/9/45/??) and AF-assist

[Daniel Browning]

There comes a time in every young forums life when he starts to experience changes. The first troll is a sign that the forum is reaching maturity. The first banning and thread deletion. Finally, the troll who comes back under a new name. We can now celebrate the forum's first day of new-found adulthood.

[wickerprints]

There comes a time in every young forums life when he starts to experience changes. The first troll is a sign that the forum is reaching maturity. The first banning and thread deletion. Finally, the troll who comes back under a new name. We can now celebrate the forum's first day of new-found adulthood.
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You just made my day. I laughed so hard my stomach hurt....

[coastalkid88]

Umm who!






no I just don't like canon rumors and I am just hear to learn and give my opinion
on threads I am new to this forum I have read many reviews on this site and highly regard bryans opinion

Thanks coastal kid

[ShutterbugJohan]

And just WHY does this cr*p matter Does this even effect any one I mean really.

Who needs more than 45 af points.

coastalkid88,


I see your new to the forum, welcome. It's always great to hear from professionals that do this for a living every day. Share some of your work and let your images do the talking.

Fred~
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Fred, on the basis of the similarities in choice of grammar, style, content, and tone of the posts, as well as the posting frequency and behavior, I suspect "coastalkid88" = "Fink_studios," the poster who wrote inappropriate responses in the (now deleted?) 1D Mark IV thread. So no, I do not believe he is "new," just someone who is violating the Terms of Use of the forum.

Fink_Studios


Alon Fink, age 21. A professional. Lives in New York and has shot for NY Times and many others.


coastalkid88


21 years old. A professional. Lives in New York and Los Angeles. Shoots for NY Times and many others.





Another note of interest: A quick Google search shows that there is an Alon Fink in Los Angeles, CA.

[2slo]

sure looks like apaparazzi. fink studios godaddy www site expired.


http://www.myspace.com/fink_studios

[peety3]

The reason that they haven't changed the auto focus system is that all of the af points on all of the cameras fit into the grid of the 45 point system. When using the af-assist beam the flash uses that specific af point to calculate the focus distance so yes it depends on which point you select. All of the flashes are only compatable with 45 af points that are available with the cameras and therefore their not going to reinvent their whole system to add extra af points to system that allready works fine
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So you've just walked into the trap. The flash AF assist lamp does not zoom. It projects the same pattern (by angle of coverage) no matter what you're shooting. Stick the camera on a tripod 20' away from a wall, aimed at the wall with a flash on top. Stick a wide-angle lens on, half-press the shutter, and the AF assist lamp will only illuminate the very center of the frame. Change the wide-angle for a 600mm, half-press the shutter, and the AF assist lamp will illuminate more than the frame. Therefore, the AF assist grid can't be assumed to align with the AF points except for one or a few key focal lengths. Assuming there are no flaws in my thinking above, why does anyone care about the AF assist lamp when they talk about limits of changing the AF system?

[Joel Bookhammer]

Hey Peety3 you make a very good arguement, I m shooting with a 40D and when I have the 85 1.2 on between 1.2-2.8 Im stuck with haveing the subject perfectly lined up with one of the autofocus sensors. I would like too see more, maybe not more then 45, but I think they should cover the frame more then what they currently do. Sure the 7D has more points, but as far as I know which i may be wrong they dont even cover the same amount of area as my 40D does.


But then again I could be wrong.


Thanks


Joel