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07-22-2007, 08:13 PM   #1
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Trap Focus!

I am shooting photos of hummingbirds, and would like to know if anyone has any information and how to setup "trap focus" for the Pentax DSLR camera's, specifically the Pentax ist DS?

Thank You,
Bill

07-23-2007, 02:05 PM   #2
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"trap focus"

Do you mean pressing the shutter and not having the camera trigger until the subject is in focus?

At least with the K10D, this is the default behavior if the camera is set to AF-S and an MF lens is attached. Not sure about AF lenses.
07-23-2007, 02:25 PM   #3
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I believe it needs the cable release also, and has to have the shutter button pressed, with the shutter interlocked with focus indication.

You will wish to have the camera on Manual focus, so that focus can be set at the trip point and nothing except your subject coming into view will trigger the shutter.

This is how it was done on my PZ-1, I have not tried it yet on the K10 or *istD.

On the PZ-1 this was a real battery burner, as the camera was up and running for hours at a time.
07-23-2007, 11:18 PM   #4
oRs
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I recommend you to read this :

How to focus trap...: Pentax SLR Talk Forum: Digital Photography Review

07-24-2007, 12:53 AM   #5
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QuoteOriginally posted by wipearl Quote
I am shooting photos of hummingbirds, and would like to know if anyone has any information and how to setup "trap focus" for the Pentax DSLR camera's, specifically the Pentax ist DS?

Thank You,
Bill

Just did something along this line but with a 135mm

6855ec.jpg photo - Daniel TONG photos at pbase.com

or http://forums.steves-digicams.com/forums/view_topic.php?id=575427&forum_id=80


Daniel, Toronto
07-24-2007, 10:07 AM   #6
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Wow those are some great photos! Nice to see another Toronto Pentaxian. :P
07-24-2007, 05:18 PM   #7
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Original Poster
Trap Focus

Thanks to all who responded with information on my inquiry on how to use trap focus . Got a ways to go to get the results that I want, attached is my first attempt.

Thanks again,
Bill
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