Originally posted by swanlefitte Very close. There is slight difference. Peeping on the stitch pattern on the f of focus the -10 is in front. 0 is the best. Probably different at 55mm anyway.
You are suppose to 25x mm away right? was this at 7.5 meters? Going from memory on this. Perhaps its the distance?
There is a difference on all of them, I think its just very mild subtle, but the focus is shifting slightly in favour of the front and back focusing bias. It's just not dramatic like how a FA77 at f1.8 might highlight.
I've read focus charts are to be done with a distance that is close to minimum focus, but not quite. This gets you the closest to the chart to assess things best.
I hate and love focus charts, because on one hand they can be helpful, but... I don't often shoot an FA77 at something close to me at f1.8, so real life 'in the field' tests can also be useful, as long as u tripod or be quite consistent, hence bottle on the wall test shots too. In the past when I have done the bottle on the wall charts I can find them more useful for fine tuning a lens as they may correspond to a situation that is akin to real life. What I have also found is the results to being similar to focus charts, in that say using a FA77 @ 1.8 and having a bottle on the wall 6-7m away you can tell with the Fine Adjustments what is improving and what is worsening. Here, doing the same thing with the PLM (0, +10, -10) the results looked similar to the focus charts, each shot just had the bottle in perfectly fine focus with neither spectrum really differing that much to the other...
Originally posted by WorksAsIntended Very baffling! Maybe try to clean the contacts, it may loose the lens id information and therefore not apply the differences?
I can try that, but everything works as normal, I doubt its contacts.
Originally posted by pschlute Are you doing the adjustment and saving using the Apply One setting ? In which case make sure the setting is still in APPLY ONE when you exit the menu ? *
if you turn the camera off or remount the lens, and go into the menu is the adjustment you made still recognised in the APPLY ONE menu ?
* If you exit the menu from the APPLY ALL setting, then that will be used instead (which may be zero)
Yep, Apply One. Restarting camera and it will show the last used value (but during the test you can change the value and shoot, you do not need to power off and on for it to take hold).
Really I just wanted to know if any other PLM user found a similar experience, or whether this is just a telezoom thing with fairly stopped down aperture focus chart analyisis thing, and that things are actually normal here and to be expected?