Focus Priority of CAM2000


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Nerd

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#1
Hi all,

I'm curious about the Focus Priority of the CAM2000 auto focus module. If I attach a Manual Lens to any of the cam with the CAM2000 auto focus module, will the Custom Function menu A1 and A2 be grayed out?

What I am wondering is that if you set the cam to focus only when pressing AF-ON, and set the shutter to release only when the subject is in focus (both AF-S and AF-C modes), and you use a manual lens, can you just hold on to the AF-ON button such that the camera doesn't fire till when you focus the lens to the sharpest point as detected by the camera thus getting a pseudo auto focus of sorts?

TIA for any useful input
 

Nerd

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Hi jnet6,

I have searched on google already. The results didn't really answer my question, which is, can you use focus priority and AF ON button to get the camera to fire when you are focusing a AI / AIS lens and it achieves focus lock even when you are still focusing it.

So what happens is that, I'm using a 55mm f2.8 micro lens. I am holding on to the AF on button and squeezing the shutter button all the way down. I start focusing the lens from minimum to infinity and keep moving, keep focusing, never really stopping.

Will it do any of the following?

1) Fire all the way regardless of if the picture is in focus even as I am focusing

2) Fire only when the AF is locked (even as I am focusing it to go out of focus since I'm still twisting the focus ring.

Thanks!
 

agape01

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I think that you would loose all focusing indiciators except whether is your shot in focus or not

I also think that you might still be able to select where you want to focus, but I also think that you could just be stuck to the centre focusing point.
 

Nerd

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I think that you would loose all focusing indiciators except whether is your shot in focus or not

I also think that you might still be able to select where you want to focus, but I also think that you could just be stuck to the centre focusing point.
Since the camera is able to detect if it's in focus or not, I am wondering if it's possible to set it to release the shutter only when it detects the shot is in focus, meaning even with the shutter button pressed all the way, it doesn't fire till it detects that it's in focus.
 

Jer

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#6
Wonder if you are refering to "trap" focusing? Care to enlighten us why you want to focus in this manner and in wat kind of situation
 

agape01

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Since the camera is able to detect if it's in focus or not, I am wondering if it's possible to set it to release the shutter only when it detects the shot is in focus, meaning even with the shutter button pressed all the way, it doesn't fire till it detects that it's in focus.
Don't think so, but you can bring your cam to a 2nd hand shop and try it out yourself.
 

Nerd

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Wonder if you are refering to "trap" focusing? Care to enlighten us why you want to focus in this manner and in wat kind of situation
Hi Jer,

yes, I'm refering to something like that. Reason being I manual focus rather slowly if precision is required and I would prefer to hover around a particular range just focusing a tiny bit back and forth and have the cam snap when it's in focus rather than spending that extra 4 seconds trying to get it just right.
 

lsisaxon

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Since the camera is able to detect if it's in focus or not, I am wondering if it's possible to set it to release the shutter only when it detects the shot is in focus, meaning even with the shutter button pressed all the way, it doesn't fire till it detects that it's in focus.
In the older film SLRs, you can use a data back to perform focus priority, so I believe you should be able to do that with the D2 series cameras. Did the manual say anything?
 

lsisaxon

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#12
westwest1,

I don't have any camera with CAM2000 autofocus module. Only 1 with a CAM900 (D70)

Reason I am asking all this is out of curiosity
The focus priority of the D2X seems to be only for AF. When MF is used, the shutter release can be released anytime regardless of whether the subject is in focus or not.
 

lsisaxon

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#16
Thanks guys! That clears it up! :D
I think Nikon should incorporate the Freeze Focus function from the F4 databack MF-23 into the D2X. It makes it very easy to shoot many things, especially when the subject is moving, the shutter will be released the moment the subject comes into focus.
 

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