----- Original Message ----- From: "Chip Louie" <[EMAIL PROTECTED]> > Hi Tim, > When you are using the EOS 1v's central AF point and EF 300 2.8L IS w/EF > 1.4x do you notice any loss in AF lock speed or tracking reliability?
No loss in speed, but tracking is more difficult as you really need to keep the centre sensor point well positioned on your subject, making good composition hard at times. Rather than using the centre point only, I generally have it on auto but with custom function 17-1 or 17-2 selected. This excellent idea expands the focus point selection to other adjacent points and makes fast tracking far simpler and more consistent. Other Canon professionals I know use this feature also. > Is the AF performance better with a bare EF 300 2.8L IS vs. with the EF 1.4x? > I notice a very slight difference with the EOS 1n when using an EF 1.4x on > the EF 300 2.8L and a sharper AF slow down with the EF 2x, this can make an > important difference in low light situations to me. ............ This is a fair desciption of what I see with the 1v as well. It is probably fair to say that overall AF performance will be improved over your 1n, but the incremental changes when using TC's will remain. > If this works very well I can avoid having to haul around an EF 400 2.8L to > solve the problem with the EOS 1n and EF 300 2.8L and EF 1.4x and EF 2x > under low light by just buying a loaded up EOS 1v. What do you think? Am I > thinking in the right direction? Whatever you do the 1v + 300/2.8 + 1.4x will not focus as fast as the 1v + 400/2.8. But the combo will be better than what you have currently and may well be enough for your application. You can never tell without trying. I wouldn't buy a 400/2.8 anyway as I have always found it to be too awkward and heavy. Given the choice I would take a 500/4. > I was unaware that there is a button with easy access that would allow you > to see the frame data. I guess the data appears on the top LCD display > after pressing a button somewhere? Then you make a note of the roll ID and > frame or sequence number? Yep. Only gives the ID though, not the shooting data. > Regarding the custom function accessed via EOS Link that reduces the shutter > lag, how does this work? You can reduce the shutter lag but where does the > body compromise? Where does the shutter lag reduction time come from? Does > it reduce AF performance? I read this in the brochure but could not figure > out how it could work or what the trade-off was Dunno Chip. The shutter lag is reduced but I'm unaware of any compromise. Certainly not in AF performance which is critical to my work. Regards, Tim * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
