Catch in focus with K-r

Posted 22/07/2011 - 19:58 Link
I've just got a new Sigma lens and wanted to try catch in focus, I found the info below but when I try it no picture is taken, any ideas?

1. Menu -> Custom 3 -> Item 20 "Catch in Focus" -> Toggle On.
2. Pop your camera to AF mode.
3. Switch your lens to MF mode if you have an AF/MF lens.
4. Switch your AF mode to AF-S.
5. Compose your photo where you predict your subject will be.
6. Press the button, hold and wait for the subject to come into the frame.
7. Camera fires when in focus.
Body: Pentax K-r & K-3 + D-BG5 Battery Grip
Lens: Pentax 18-55mm L - Pentax 18-55mm AL WR - HD PENTAX-DA 15mm F4 - Sigma 18-250mm f/3.5-6.3 DC OS HSM - Sigma 50mm EX DG Macro - Sigma 150-500mm f/5-6.3 DG OS HSM - Kenko 2x Teleplus
Flash: AF-360FGZ
johnriley
Posted 22/07/2011 - 20:01 - Helpful Comment Link
Did you remember to also manually focus on the spot you wanted to take the picture? When the subject arrives at that spot the AF system thiks it's in focus and the shutter should release.
Best regards, John
Posted 22/07/2011 - 20:07 Link
Thanks for the quick reply, I've just had another try and got it to work, it doesn't work how I thought it would I thought it would auto focus didn't realise I had to manual focus as well
Body: Pentax K-r & K-3 + D-BG5 Battery Grip
Lens: Pentax 18-55mm L - Pentax 18-55mm AL WR - HD PENTAX-DA 15mm F4 - Sigma 18-250mm f/3.5-6.3 DC OS HSM - Sigma 50mm EX DG Macro - Sigma 150-500mm f/5-6.3 DG OS HSM - Kenko 2x Teleplus
Flash: AF-360FGZ
fatspider
Posted 22/07/2011 - 20:07 - Helpful Comment Link
Quote:
Switch your lens to MF mode if you have an AF/MF lens.
As far as I'm aware catch in focus will only work with a non AF lens, when a non AF lens is mounted the AF drive pin on the body mount is pushed back into the camera and disengages, with an AF lens it will still be engaged and trying to focus the lens regardless of what switches are set on the lens itself.
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
dcweather
Posted 22/07/2011 - 20:12 Link
I have a recollection that I've used this with manual focus only lenses by pointing at the subject with shutter down then changing the focus till the shutter fires. (When it has focused)
FAT8BIKER
Posted 23/12/2011 - 12:02 Link
See belowwwww
SHOOT IN CATCH-IN FOCUS MODE.
When (20. catch-in focus) in the (C custom setting 3) menu (p.90) is set to (on), if (AF mode) is set to AF.A or AF.S and one of the following types of lenses is attached . catch-in focus shooting is enabled and the shutter is released automaticly when the subject comes into focus.
.
MANUAL FOCUS LENS.
DA OR FA LENS that has an AF and MF setting on the lens (the setting on the lens must be set to MF before shooting)
HOW TO TAKE PICTURES
1 Attach a proper lens to the camera.
2 Set the focus mode lever to AF.(THE ONE ON THE CAMERA BODY NOT ON THE LENS)
3 Set (AF mode) to AF.A or AF.S.
4 Set the focus on a position the subject will pass.
5 Press the shutter release button fully.
the shutter is released automaticlly when the subject comes into focus at the set position.
So if you have a manual lens your ok other wise you will need prime or special lenses, kit lenses wont work and neither will the 35mm or the 55/300.
Hope this is of some help.
I need to learn how to type, my finger is shorter than when i started.
Regards
Dave
fatspider
Posted 23/12/2011 - 12:33 Link
Thanks for raising this topic again Dave, I just checked this with my 50-135 and it does indeed allow the use of catch in focus, unfortunately the MF setting on my Sigma 50-500 doesn't, the motor in the camera body continues to operate, it would be interesting to know if any of the newer third party lenses will work if set to MF.
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
Mike-P
Posted 23/12/2011 - 13:00 Link
fatspider wrote:
it would be interesting to know if any of the newer third party lenses will work if set to MF.
Just tried it on my Sigma 50-150mm HSM and it works fine, not so with my Sigma 70-200mm f2.8 or non OS 50-500mm.

Guessing it's only HSM models for Sigma ... no doubt a 150-500mm or 50-500mm OS user can verify.
rosesred
Posted 23/12/2011 - 15:23 Link
yeah tried that on k7 with mf 50mm, everytime it takes photo it is out of focus, so maybe needs micro adjustments to AF?

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