adamduckworth
New member
On my Nikon and Canon DSLRs, I use the "rear button AF ON" method of using autofocus. ie. Half-pressing the shutter doesn't activate the AF, but pushing the rear AF ON button does.
I leave the AF mode to continuous, so it's continuous AF if you keep your thumb on the button, and single shot/ manual focus when you take your thumb off it. I've used all my cameras like this for years.
So, I followed a recent thread where (Guy, I think) explained how to set up the 645 DF to do this. By swapping AFL for AEL and disabling the shutter button from doing any AF.
This method initially seems to work, but the AF hunts virtually all the time. In, like, 95% of photos. It just doesn't lock focus on properly and the lens hunts back and forth for a few seconds - sometimes more. It does this in C or S modes on the lens.
The AF is set to accurate, and it doesn't seem to matter if the AF area is centre spot or the other options.It does this with all my LS lenses. Haven't tried other lenses.
Anyone got this 'AF ON' method to work on a 645DF? (Well, actually you're using the AEL button). I have a V-Grip fitted, and using it in portrait mode and using its thumb button also has the same effect.
When I put the camera back to normal (ie shutter release half-push to focus), then it's all perfectly normal. It's with a P40+ back, by the way, of that matters.
Thanks!
I leave the AF mode to continuous, so it's continuous AF if you keep your thumb on the button, and single shot/ manual focus when you take your thumb off it. I've used all my cameras like this for years.
So, I followed a recent thread where (Guy, I think) explained how to set up the 645 DF to do this. By swapping AFL for AEL and disabling the shutter button from doing any AF.
This method initially seems to work, but the AF hunts virtually all the time. In, like, 95% of photos. It just doesn't lock focus on properly and the lens hunts back and forth for a few seconds - sometimes more. It does this in C or S modes on the lens.
The AF is set to accurate, and it doesn't seem to matter if the AF area is centre spot or the other options.It does this with all my LS lenses. Haven't tried other lenses.
Anyone got this 'AF ON' method to work on a 645DF? (Well, actually you're using the AEL button). I have a V-Grip fitted, and using it in portrait mode and using its thumb button also has the same effect.
When I put the camera back to normal (ie shutter release half-push to focus), then it's all perfectly normal. It's with a P40+ back, by the way, of that matters.
Thanks!