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Forum: Pentax K-5
02-24-2012, 09:10 AM
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I did these tests to try to further understand the actual functioning of the AF Adjustment, and finally figured it out.
All lens swaps involved powering off the body. AF Adjustment values were checked in EXIF of the RAW pics.
Start with AF Adjustment Off, [ALL] = 0; [ONE]= unset
Power Up with 18-135 lens
Set 18-135 [ONE] to +2
Set [ALL] to +5
* take picture: AF used = +5
Swap in 70mm DA
Set [ONE] to +7
'OK' [ALL] at +5
* take picture AF used = +5
Swap in 18-135
* take picture: AF used = +5
Power Off/ON
* take picture: AF used = +5
Swap in 70mm
* take picture: AF used = +5
'OK' [ONE] at +6
* take picture: AF used = +6
Swap in 18-135
* take picture: AF used = +5
Power Up with 18-135
OK [ONE] at +2
* take picture: +2 used
Power Cycle
* take picture: +2 used
Swap in 70mm
* take picture: +6 used ([ONE] value I last set for 70mm above)
Swap in 18-135
* take picture: +2 used ([ONE] value I last OKd for this lens)
OK [ALL] at +5 with 18-135
* take picture: +5 used
Swap in 70mm
* take picture: +6 used ([ONE] value)
Swap in 18-135
* take picture: +5 used ([ALL] value last OK'd with this lens)
An [ALL] setting will over-ride a [ONE] setting for that lens IF [ALL] was OK'd last with that lens.
A [ONE] setting will be used for a specific lens IF that [ONE] setting was OK'd last with that lens.
SOO, as the manual hints, whatever value [ALL] or [ONE] was OK'd last with a specific lens will be the AF value used for that lens.
Sort of makes sense...as long as you are aware of it. :)
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Forum: Post Your Photos!
02-04-2012, 09:10 PM
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Forum: Pentax Film SLR Discussion
12-29-2011, 08:20 PM
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I came across a thread with what I think is a very significant little tip regarding these cameras.
Flickr: Discussing Me super problem in ME Super
About half way down there's a mention of storing these cameras wound on and ready to shoot. This makes sense as the metal arm in the picture (I think) would not be pressing against the rubber for an extended period of time and therefore would not have a chance to stick.
I've tried it with mine over the past week or two along with cycling the shutter through a few empty shots every now and then and it's now stopped skipping shots.
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Forum: General Talk
09-29-2009, 11:01 AM
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Saw a link to these in the strobist twitter feed, quite amazing and to consider the patience and work that went into making these
Stunning shots of thirsty bats swooping to lick water from garden pond | Mail Online
includes a setup shot too. since it sayd the IR triggered the flashes and not the camera I guess thats either a typo or he used bulb mode... Wonder what he did about focus, has to be prefocus and how far he had to stop down, the shots look very sharp
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Forum: Pentax DSLR Discussion
09-06-2011, 02:41 AM
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Forum: Pentax DSLR Discussion
09-06-2011, 08:29 AM
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Guess those paparazzi's will have to go back to using film :)
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Forum: Pentax K-5
08-28-2011, 09:58 AM
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I've experienced the problem myself with wide lenses on multiple bodies, so I think it's just a slight AF misadjustment. I'm very happy for the fine adjustment feature, as my wide lenses can finally lock without problems. All the lenses were screwdrive, not sdm- so maybe it's an implementation problem? In any case, not a big deal any more.
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