Actually I was suggesting it for Alan to try since he said the screw
drive was hopeless (too slow?).
I understood it to work with holding the shutter button down & the
shutter fires if something moves into the focus area.
The focus on your hawk-moths seemed to be fine.
On 7/14/2025 1:28 PM, Henk Terhell wrote:
John I never used this as I thought this is only for manual lenses.
The article confirms this. Only AF lenses with a MF switch can also be
used.
I did some experiments now with catch-in settings on the K-70 with
55-300 PLM and indeed the shutter only triggers after a second press if
in focus.
Moreover, for fast moving insects at a distance of about 1 -2 m there is
a very small DOF and a final focus adjustment is always needed.
My settings for insects (and people) are always AFS spot and back button
only.
Henk
Op 2025-07-13 om 21:31 schreef John Sessoms:
Have you tried "trap focus" or "Catch-in focus"?
https://www.pentaxforums.com/articles/photo-articles/catch-in-focus-tutorial.html
On 7/11/2025 8:08 AM, Alan Cole wrote:
You did well, Henk. My K5 & HD 55-300 screw drive is hopeless, even
for 'planes.
Alan C
On 11/07/2025 12:29, Henk Terhell wrote:
It is quite a challenge to shoot these fast moving hummingbird
hawk-moths jumping around in a field of flowers.
It would be easier with better focussing gear than my K-70/ 55-300
PLM combo, though the difficulty is to get it into view.
One trick sometimes is to focus on one flower and waiting on a visit
of this moth.
At least I know that over here soapwort is their favourite flower.
Here a few of my attempts so far this season.
https://flic.kr/p/2rerzvs
https://flic.kr/p/2rerCGs
https://flic.kr/p/2re7rib
Henk
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