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10-23-2010, 12:38 PM   #1
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Catch in focus conundrum

Hi Guys,
How come if I have AF set on half press (K100D on M80-200)
the cif works ie: only releases shutter when focus light lit...
but when I set enable focus on the OK button, the shutter will release whether the focus light is on or not ?

I tried asking the Poms this question in another place but it was beyond them
cheers
Pete

10-23-2010, 12:43 PM   #2
Raylon
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When you have the AF set to shutter button, the picture will not take because it has to wait till the subject is in focus.

But if you have the AF set to the OK button, the shutter button doesn't care whether or not the subject is in focus, you would have to hold the OK button for CIF to work with that setup.
10-23-2010, 12:48 PM   #3
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Snappy reply thanks Raylon

I see. That's a bit weird but I understand.
cheers
Pete
10-23-2010, 12:50 PM   #4
Raylon
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QuoteOriginally posted by Transit Quote
Snappy reply thanks Raylon

I see. That's a bit weird but I understand.
cheers
Pete

No problem. Don't take my word for it 100% though, I am just guessing.

I am just thinking that AF actually has to be on and working for CIF to work. If AF isn't activated, it isn't trying to do CIF.

10-23-2010, 01:13 PM   #5
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This is what puzzles me.
Hitting the OK turns it on...The light comes on and off with shutter releasing regardless.
Maybe there is a difference between AF-C and AF-S...
will check in a tic
cheers
Pete
10-23-2010, 01:17 PM   #6
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QuoteOriginally posted by Transit Quote
This is what puzzles me.
Hitting the OK turns it on...The light comes on and off with shutter releasing regardless.
Maybe there is a difference between AF-C and AF-S...
will check in a tic
cheers
Pete
Catch In Focus only works with AF-S. On AF-C, the shutter will fire, with a Manual focus lens (you said M80-200), regardless of focus. In this instance, I fail to see why you are using the AF button at all.

10-23-2010, 02:04 PM - 1 Like   #7
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Perhaps it's been answered already, but here goes:

1. Set whatever lens you're using to MF (or just use a MF-only lens). If the lens you're using is an AF lens that cannot be set to MF, that won't work.
2. Camera needs to be set to AF S (not AF C)
3. If you're shooting the camera with a remote shutter release, the autofocus needs to be enabled to work with the shutter button. If you have your camera set to only focus using the AF button on the back of the camera, CIF won't work.

Hope that helps

Pete
10-23-2010, 02:09 PM   #8
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QuoteOriginally posted by JeffJS Quote
Catch In Focus only works with AF-S. On AF-C, the shutter will fire, with a Manual focus lens (you said M80-200), regardless of focus. In this instance, I fail to see why you are using the AF button at all.

AF-S only ...ok thanks !

I still can't see why activating the AF on the OK button as apposed to half press on shutter gives different result though.

I was using it to allow the focus confirm light to help me know if I was in focus !
Haven't put the split disc focus screen in yet and my eyes are pretty bad.

cheers
Pete

10-23-2010, 02:17 PM - 1 Like   #9
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QuoteOriginally posted by Transit Quote
AF-S only ...ok thanks !

I still can't see why activating the AF on the OK button as apposed to half press on shutter gives different result though.

I was using it to allow the focus confirm light to help me know if I was in focus !
Haven't put the split disc focus screen in yet and my eyes are pretty bad.

cheers
Pete
I don't think there is anything wrong with what you are doing for focus confirmation but the OK/AF button, unless I'm mistaken, doesn't actually fire the shutter. Unless I am missing something as to what your exact problem is.

10-23-2010, 02:28 PM - 1 Like   #10
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Probably the way I am explaining it
and I just gave you a rep for persevering with me

First...it isn't a problem, just puzzled

I try in different words.
The AF can be turned on in two ways.
The OK button or the half press.

When turning it on with the OK button
catch in focus does not occur.
When turning it on with half press,
catch in focus does occur.
I wonder what is the difference.

Maybe I should just go and take pictures

cheers
Pete
10-23-2010, 02:56 PM   #11
Col
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I can't help with the K100D directly, but I use CIF a lot with the K20D & now the K5 both with AF detached from the Shutter.

In these circumstances for it to work you hold the AF button down and depress the shutter at the same time in a finger & thumb squeeze. (easier than it sounds). The shutter wont fire until the subject is in focus (or you take you thumb of the AF switch first by mistake).

ps. why "The Yes Album"?
10-23-2010, 03:17 PM   #12
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Thank you for the Rep, always appreciated especially when I know who it came from.

I think the simple answer is that the OK button does not release the shutter. I know the AF button my cameras does not and in this case, same function. Yes, go take some photos

10-23-2010, 03:47 PM   #13
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Transit as to your puzzlement, I believe the CIF must have been designed around using the shutter button only mode( which incorporates all the systems, AF, SR, AE metering & finally shutter) as you have been made aware by pressing both the shutter release button & ( OK or AF) button simultaneously, this combines the systems again. Cheers Dre.
10-23-2010, 04:06 PM   #14
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QuoteOriginally posted by Col Quote
I can't help with the K100D directly, but I use CIF a lot with the K20D & now the K5 both with AF detached from the Shutter.

In these circumstances for it to work you hold the AF button down and depress the shutter at the same time in a finger & thumb squeeze. (easier than it sounds). The shutter wont fire until the subject is in focus (or you take you thumb of the AF switch first by mistake).

ps. why "The Yes Album"?
ah yes I see...now I can get cif using the OK button !
Thanks

Why the Yes album ?
Tales wouldn't fit
I set it as an avatar when I joined an MP3 player forum. Then though it might make a nice change to use it in here too. Serindipidously I later noticed the film side bars which seems rather appropriate
Just watched "School of Rock' for the first time last night and was pleased to see Jack handed out a Fragile CD as part of homework
Pete
10-23-2010, 04:07 PM   #15
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QuoteOriginally posted by DreTAX Quote
Transit as to your puzzlement, I believe the CIF must have been designed around using the shutter button only mode( which incorporates all the systems, AF, SR, AE metering & finally shutter) as you have been made aware by pressing both the shutter release button & ( OK or AF) button simultaneously, this combines the systems again. Cheers Dre.
the fog has cleared now thanks !
Pete
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