Catch in focus.

robert · 02-09-2016, 09:41 PM

I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire.

**sergysergy** · 02-09-2016, 09:55 PM

If there is not enough light it will not work.

robert · 02-09-2016, 10:03 PM

Originally posted by sergysergy

If there is not enough light it will not work.

There seemed to be enough light. I would think if there wasn't enough light the confirmation light wouldn't beep.

stevebrot · 02-09-2016, 10:47 PM

Originally posted by robert

I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire.

I can't say for sure regarding the K-5, but on many of the newer bodies CIF will only work with lenses having a conductive base. Most M42 lenses do not.

Steve

biz-engineer · 02-09-2016, 11:05 PM

I'm not sure, for catch in focus to work the lens has to be manual or has to have a AF/MF focus switch on the lens body itself. Here is an article about it ( Catch-in-Focus Tutorial - Articles and Tips | PentaxForums.com ) and I can confirm as far as I remember using it with my K-5 and K-3. But I try once and it did not work , there was something to enable or disable in the menus such "allow manual aperture ring thing" or something like that.

Stone G. · 02-10-2016, 12:41 AM

Originally posted by robert

I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire.

That is as it "should" be. As also indicated by stevebrot, CIF requires K-mount (MF-) lenses with a metallic base that will shorten the contacts on the camera body. Black anodized K- and M42 lenses will not work.

opel3nix · 02-10-2016, 02:11 AM

Originally posted by robert

I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire.

You have to shorten the contacts on your DSLR Body! All M 42 lenses used whith the genuine M42 adapter will not shorten the contacts! Yoe have to use an adapter whith flange to cover the contacts, but you will loose infinity-focus. This will only work whith longer lenses going past infinity.

**k0og** · 02-10-2016, 05:13 AM

You can short-circuit the contacts with a little piece of foil. The connection may not be very reliable due to the looseness of the foil, but it does work. I've done this on my K100DS and K5, and it makes CIF work.

-Joe-

robert · 02-10-2016, 09:33 AM

I don't know if this is a big deal because I still get a confirmation light and beep when in focus although it may not be that accurate.

stevebrot · 02-10-2016, 08:56 PM

Originally posted by biz-engineer

I'm not sure, for catch in focus to work the lens has to be manual or has to have a AF/MF focus switch on the lens body itself. Here is an article about it ( Catch-in-Focus Tutorial - Articles and Tips | PentaxForums.com ) and I can confirm as far as I remember using it with my K-5 and K-3. But I try once and it did not work , there was something to enable or disable in the menus such "allow manual aperture ring thing" or something like that.

Huh?

Three requirements on your K-5 and K-3:

Lens must be native manual focus or with AF turned off at the lens
AF must be set to AF-S
Data contact must be shorted (see diagram below for location) or in contact with its mate on the lens.

All of the the above are in the user guide except for the third point. The menu setting to enable aperture ring is also required if using the aperture ring, but that is not directly related to CIF.

Steve

stevebrot · 02-10-2016, 08:59 PM

Originally posted by robert

I don't know if this is a big deal because I still get a confirmation light and beep when in focus although it may not be that accurate.

Accuracy and precision are the same as with CIF or AF. That being said, there is a risk with CIF of focus overrun due to system lag.

Steve

02-09-2016, 09:41 PM	#1
robert Veteran Member Join Date: Jan 2007 Location: ohio Posts: 336	Catch in focus. I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire.

02-10-2016, 08:56 PM	#10
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by biz-engineer I'm not sure, for catch in focus to work the lens has to be manual or has to have a AF/MF focus switch on the lens body itself. Here is an article about it ( Catch-in-Focus Tutorial - Articles and Tips \| PentaxForums.com ) and I can confirm as far as I remember using it with my K-5 and K-3. But I try once and it did not work , there was something to enable or disable in the menus such "allow manual aperture ring thing" or something like that. Huh? Three requirements on your K-5 and K-3: Lens must be native manual focus or with AF turned off at the lens AF must be set to AF-S Data contact must be shorted (see diagram below for location) or in contact with its mate on the lens. All of the the above are in the user guide except for the third point. The menu setting to enable aperture ring is also required if using the aperture ring, but that is not directly related to CIF. Steve Last edited by stevebrot; 02-10-2016 at 09:04 PM.

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02-09-2016, 09:55 PM	#2
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,175	If there is not enough light it will not work.

02-09-2016, 10:03 PM	#3
robert Veteran Member Join Date: Jan 2007 Location: ohio Posts: 336 Original Poster	Originally posted by sergysergy If there is not enough light it will not work. There seemed to be enough light. I would think if there wasn't enough light the confirmation light wouldn't beep.

02-09-2016, 10:47 PM	#4
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by robert I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire. I can't say for sure regarding the K-5, but on many of the newer bodies CIF will only work with lenses having a conductive base. Most M42 lenses do not. Steve

02-09-2016, 11:05 PM	#5
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,247	I'm not sure, for catch in focus to work the lens has to be manual or has to have a AF/MF focus switch on the lens body itself. Here is an article about it ( Catch-in-Focus Tutorial - Articles and Tips \| PentaxForums.com ) and I can confirm as far as I remember using it with my K-5 and K-3. But I try once and it did not work , there was something to enable or disable in the menus such "allow manual aperture ring thing" or something like that.

02-10-2016, 12:41 AM	#6
Stone G. Pentaxian Join Date: Jun 2010 Location: North Zealand, Denmark Photos: Gallery \| Albums Posts: 1,516	Originally posted by robert I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire. That is as it "should" be. As also indicated by stevebrot, CIF requires K-mount (MF-) lenses with a metallic base that will shorten the contacts on the camera body. Black anodized K- and M42 lenses will not work.

02-10-2016, 02:11 AM	#7
opel3nix Junior Member Join Date: Mar 2014 Location: 48599 Gronau Photos: Albums Posts: 26	Originally posted by robert I used this successfully with my one M lens but it doesn't seem to work with my M42 lens. It beeps when it is in focus but doesn't fire. You have to shorten the contacts on your DSLR Body! All M 42 lenses used whith the genuine M42 adapter will not shorten the contacts! Yoe have to use an adapter whith flange to cover the contacts, but you will loose infinity-focus. This will only work whith longer lenses going past infinity.

02-10-2016, 05:13 AM	#8
k0og Site Supporter Join Date: Nov 2008 Location: Rolla, Missouri Photos: Gallery \| Albums Posts: 699	You can short-circuit the contacts with a little piece of foil. The connection may not be very reliable due to the looseness of the foil, but it does work. I've done this on my K100DS and K5, and it makes CIF work. -Joe-

02-10-2016, 09:33 AM	#9
robert Veteran Member Join Date: Jan 2007 Location: ohio Posts: 336 Original Poster	I don't know if this is a big deal because I still get a confirmation light and beep when in focus although it may not be that accurate.

02-10-2016, 08:59 PM	#11
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by robert I don't know if this is a big deal because I still get a confirmation light and beep when in focus although it may not be that accurate. Accuracy and precision are the same as with CIF or AF. That being said, there is a risk with CIF of focus overrun due to system lag. Steve