D70 AF Questions

Surely you've got that the wrong way round

 

Nope, it works the way I stated. Your theory is spot on, but in practice I have found that with the focus set to AF-S the camera "thinks" it has achieved focus and allows me to take the shot, but the results are mostly blurred.

 

Not being a technical photographer, my only conclusion was that possibly the camera achieves focus and then with the shutter release still half depressed a small change in position due to the water movement (swell and current), results in the focal distance having changed, with the resultant out of focus picture. With AF-C the camera repeatedly recalculates the new focal distance, so a change in position with the shutter release halfway depressed does not affect the result.

 

Maybe one of the guru's can clarify this for us (pun intended)...?

Interesting, my experiencing is the complete opposite of yours. When the weather warms up and I can leave the gloves off I may have the sensitivity to press the shutter button halfway. At present diving in the UK I can barely feel my fingers so using AF-C just isn'y an option.

Interesting, my experiencing is the complete opposite of yours. When the weather warms up and I can leave the gloves off I may have the sensitivity to press the shutter button halfway. At present diving in the UK I can barely feel my fingers so using AF-C just isn'y an option.

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I dive with big fat dry gloves all of the time, and don't have any problems doing a half-press with my Ikelite housing. The lever is long enough that you seem to have pretty good sensitivity and control over the shutter release.

Dave

I started using AF-C on my last trip and really liked it......I use the AE-L/AF-L button to turn on focus and then use the shutter to get the shot

In the menu, go to AE-L/AF-L and choose AF On....this works the same as the half depress, but you don't have to be so careful

With my thumb, I press the AF-on button to start continuous focus on the subject.....then I hit the shutter for the shot.....works great

Karl

that's exactly what I do with my d70. I use the AE button for AF and recompose after focusing. Works like a charm and i assume it will work with gloves on and you don't have much tactile feel.

Tony