Pentax iST DS catch in focus?

bluestringer · 06-11-2018, 05:37 AM - **1 Like**

I finally got it to work by treating the manual lens as if was a auto-focus lens and holding in the lens release button. I've done this trick on my other cameras to make catch in focus work on a auto focus lens. For some reason my iST DS treats a manual lens as if it is a auto-focus lens. Weird.

kypfer · 06-12-2018, 06:02 AM

I've managed to find one scenario where the "Catch in Focus" feature doesn't work on my camera ... it's when the image is of insufficient contrast or too dimly lit for the camera to be able to determine what's in and out of focus. In this instance the Focus Confirmation Indicator symbol doesn't light at all, flashing or otherwise and the camera will not fire. This is true both with my *ist DS and my K-5.

bluestringer · 06-12-2018, 05:44 PM

Originally posted by kypfer

I've managed to find one scenario where the "Catch in Focus" feature doesn't work on my camera ... it's when the image is of insufficient contrast or too dimly lit for the camera to be able to determine what's in and out of focus. In this instance the Focus Confirmation Indicator symbol doesn't light at all, flashing or otherwise and the camera will not fire. This is true both with my *ist DS and my K-5.

Yes, I've ran into this many times in the field when the subject is in deep shadows and not well lit. I've got it to work sometimes by backing off the subject allowing more light in.

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06-11-2018, 05:37 AM - 1 Like	#16
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748 Original Poster	I finally got it to work by treating the manual lens as if was a auto-focus lens and holding in the lens release button. I've done this trick on my other cameras to make catch in focus work on a auto focus lens. For some reason my iST DS treats a manual lens as if it is a auto-focus lens. Weird.

06-12-2018, 06:02 AM	#17
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,588	I've managed to find one scenario where the "Catch in Focus" feature doesn't work on my camera ... it's when the image is of insufficient contrast or too dimly lit for the camera to be able to determine what's in and out of focus. In this instance the Focus Confirmation Indicator symbol doesn't light at all, flashing or otherwise and the camera will not fire. This is true both with my *ist DS and my K-5.

06-12-2018, 05:44 PM	#18
bluestringer Veteran Member Join Date: Nov 2011 Location: Cotton fields of South Georgia Photos: Gallery Posts: 2,748 Original Poster	Originally posted by kypfer I've managed to find one scenario where the "Catch in Focus" feature doesn't work on my camera ... it's when the image is of insufficient contrast or too dimly lit for the camera to be able to determine what's in and out of focus. In this instance the Focus Confirmation Indicator symbol doesn't light at all, flashing or otherwise and the camera will not fire. This is true both with my *ist DS and my K-5. Yes, I've ran into this many times in the field when the subject is in deep shadows and not well lit. I've got it to work sometimes by backing off the subject allowing more light in.

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