Focus Oscillation in K3 iii?

Started 3 months ago | Discussions thread
OP JoeOptics314 Regular Member • Posts: 135
Re: Focus Oscillation in K3 iii?

Polacofede wrote:

Are you shooting in single shot mode? Have you set up the camera in order to use the back button to focus and the release to just take the shot or when pressing the release button is also focusing?

I am shooting single shot mode.  I push the button half way down, listen for the high pitched tone and red lines for a second in the viewfinder telling me I am in focus and then push the rest of the way down to take the picture.  When I do that repeatedly , waiting before each shot for the audio and visual focus cues, I see significant variation in how sharp the focus is.  Even on a tripod viewing a fixed target.  The amount of defocus across 3 to 5 shots seems larger with the 70-210 mm lens than with my 55-300 mm PLM

-- hide signature --

David Lees

 JoeOptics314's gear list:JoeOptics314's gear list
Pentax K-70 Pentax K-3 Mark III Pentax smc DA* 300mm F4.0 ED (IF) SDM Pentax smc D-FA 100mm F2.8 Macro WR Tamron AF 18-200mm F/3.5-6.3 XR Di II LD Aspherical (IF) Macro +7 more
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow