RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Started Aug 11, 2012 | Discussions
Shop cameras & lenses ▾
Carl bcn
Carl bcn New Member • Posts: 15
RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Hi, I've had the RX100 for a couple of days now and, I've solved most of my doubts thanks to the power of google (many of my searches lead me to this forum, so thanks to everybody who contributed), but there are some things I haven't been able yet to clarify:

  • Even though I have selected AF-single shot (not tracking, not continuous), the camera is constantly pre-focusing while I do nothing but hold the camera in my hand while I walk. I find it annoying and I guess it's wasting battery energy. But as far as I know, there's no way to change this behavior, am I right? (At least on PASM modes).

  • For the same reason (battery waste), I'd like to be able to turn off the screen manually or at least have it turned off automatically after a certain amount of time - not turning off the camera, just the display. Again, I'm afraid this isn't possible, is it?

  • When I walk with the camera turned on in my hand, and I turn my wrist or lift the camera to my eyes, I can sometimes feel as if something relatively chunky (not a tiny little thing) made some kind of contact with the camera structure every now and then. I don't know how to explain, it's not like something is totally loose, just that it has some play. I assume it is the lens barrel, since I can push it a little - it's not 100% rigidly locked in place (this only happens when the camera is on and the barreal is extended). But maybe it has nothing to do with that, and it's caused by the steady shot mechanism... or with the constant autofocus I just mentioned above. Anyway, this seems to have no effect on the quality my photos, but I was wondering if anyone has experienced the same issue.

Thanks for your help!!

Sony RX100
If you believe there are incorrect tags, please send us this post using our feedback form.
villebon Senior Member • Posts: 2,185
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Carl bcn wrote:

  • Even though I have selected AF-single shot (not tracking, not continuous), the camera is constantly pre-focusing while I do nothing but hold the camera in my hand while I walk.

Have you tried pressing the center button to turn it off when the lcd indicates that auto tracking is on?

-- hide signature --

Villebon

Albert C. Lee
Albert C. Lee Contributing Member • Posts: 653
The camera is always pre-focusing, has nothing to do with tracking

The camera is definitely doing a bit of pre-focus work so the time to focus when you're ready to shoot is shorter. At least that's my best theory.

Have you tried pressing the center button to turn it off when the lcd indicates that auto tracking is on?

-- hide signature --
 Albert C. Lee's gear list:Albert C. Lee's gear list
Leica Q Sony RX100 II Fujifilm X-T1 +1 more
Carl bcn
Carl bcn OP New Member • Posts: 15
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Villebon: Yes, I tried that because I thought it was autotracking something, but autotracking is off . Also, it is not tracking a specific target: it just focuses on the closest object, it seems. Thanks anyway!

Albert C. Lee: Yes, I think that's the reason, since I've seen that behavior before on some Canon compacts. But it was possible to disable it and change the setting from "continuous" to "shot only"... which seems to be not an option here. Thanks for your help.

jonrobertp Forum Pro • Posts: 12,602
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Carl, I have exactly the same thing happening...and the same concern. You'd think there was a way to turn it off...to save battery...and moving parts.

I've resorted to holding my hand in front of the open lens..but shouldn't have to.
Hope there is a solution ...somewhere.

 jonrobertp's gear list:jonrobertp's gear list
Sony Cyber-shot DSC-HX50V Canon PowerShot G7 X Canon PowerShot G3 X Panasonic Lumix DMC-ZS100 Canon EOS 70D
DC Forum Member • Posts: 86
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Hi Carl,

I have experienced all three of your questions. The focus mode you are looking for is DMF. Don't know about turning off LCD and don't know about that odd loose bump or noise.

Derek

Carl bcn
Carl bcn OP New Member • Posts: 15
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

JonRobertP: I'm happy not be alone here, hehe! Thanks for letting me know.

Derek: True! I had forgotten I tried DMF and it seemed like it was doing what I wanted, but I didn't fully understand it (the online manual just says "Allows you to use manual focus and auto focus in combination") and I had completely forgotten since. Now the camera is charging but I will give it a try again. Thank you, really. I've used Canon gear all my life (both compact and reflex) and Sony terminology is a new, confusing world for me...

As for the occasional loose minibumps, have you experienced them or not? (Sorry if I didn't understand you) And, anyway, do you perceive a slight play on the lens barrel? Anyway, I have an S95 too (soon to be sold) and the barrel isn't 100% lock into place either, but the play is somehow "elastic", it really can't "bump" as the Sony seems to do (again, that might not be the reason, but so far I haven't been able to find the culprit for sure).

Again thanks everybody.

jonrobertp Forum Pro • Posts: 12,602
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Carl bcn wrote:

JonRobertP: I'm happy not be alone here, hehe! Thanks for letting me know.

Derek: True! I had forgotten I tried DMF and it seemed like it was doing what I wanted, but I didn't fully understand it (the online manual just says "Allows you to use manual focus and auto focus in combination") and I had completely forgotten since. Now the camera is charging but I will give it a try again. Thank you, really. I've used Canon gear all my life (both compact and reflex) and Sony terminology is a new, confusing world for me...

As for the occasional loose minibumps, have you experienced them or not? (Sorry if I didn't understand you) And, anyway, do you perceive a slight play on the lens barrel? Anyway, I have an S95 too (soon to be sold) and the barrel isn't 100% lock into place either, but the play is somehow "elastic", it really can't "bump" as the Sony seems to do (again, that might not be the reason, but so far I haven't been able to find the culprit for sure).

Again thanks everybody.

Hey...this DMF..works !! just did it. And the color peaking level...well, that's a bit too much for me. Turning the front ring..brings the image up very close...can't really say I've noticed much if any change of focus w the manual turning, but that's not to say it doesn't work. But it also turns itself off in a few seconds...good or not..it just does.

But the focus confirmation ...close view..is neat ! The lose lens...haven't checked...but I would not be surprised if the slight clunkyness we felt had to do w the unit constantly AFsing...when it need not be. live and learn.
good wishes
Jon

 jonrobertp's gear list:jonrobertp's gear list
Sony Cyber-shot DSC-HX50V Canon PowerShot G7 X Canon PowerShot G3 X Panasonic Lumix DMC-ZS100 Canon EOS 70D
zoranT Contributing Member • Posts: 915
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

jonrobertp wrote:

Carl bcn wrote:

JonRobertP: I'm happy not be alone here, hehe! Thanks for letting me know.

Derek: True! I had forgotten I tried DMF and it seemed like it was doing what I wanted, but I didn't fully understand it (the online manual just says "Allows you to use manual focus and auto focus in combination") and I had completely forgotten since. Now the camera is charging but I will give it a try again. Thank you, really. I've used Canon gear all my life (both compact and reflex) and Sony terminology is a new, confusing world for me...

As for the occasional loose minibumps, have you experienced them or not? (Sorry if I didn't understand you) And, anyway, do you perceive a slight play on the lens barrel? Anyway, I have an S95 too (soon to be sold) and the barrel isn't 100% lock into place either, but the play is somehow "elastic", it really can't "bump" as the Sony seems to do (again, that might not be the reason, but so far I haven't been able to find the culprit for sure).

Again thanks everybody.

Hey...this DMF..works !! just did it. And the color peaking level...well, that's a bit too much for me. Turning the front ring..brings the image up very close...can't really say I've noticed much if any change of focus w the manual turning, but that's not to say it doesn't work. But it also turns itself off in a few seconds...good or not..it just does.

you can adjust the time how long the magnification stays in live view, when you turn the focus wheel; peaking can only help for certain motifs;

also, you could assign MF/AF to one of the buttons, keeping it on manual, and shortly before you use it switch to auto, thus avoiding permanent focussing

DC Forum Member • Posts: 86
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Carl,

I have experienced all three of your questions but I don't have answers for your second and third question. Hopefully sony or someone can answer them.

Derek

cllcanada Regular Member • Posts: 351
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

I use DMF exclusively with a center focus setting for macros. The AF is excellent, however shooting at wide apperatures the depth of focus is so narrow, that AF can focus on something you don't want...so AF does the heavy focus lifting, and then I fine tune it manually to the exact point ...using focus magnification...works very well, and better than peaking...

 cllcanada's gear list:cllcanada's gear list
Sony RX100 Sony Cyber-shot DSC-HX400V ProCamera
jonrobertp Forum Pro • Posts: 12,602
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

thx guys...where do we adjust the time it stays on manual ? thx

 jonrobertp's gear list:jonrobertp's gear list
Sony Cyber-shot DSC-HX50V Canon PowerShot G7 X Canon PowerShot G3 X Panasonic Lumix DMC-ZS100 Canon EOS 70D
cllcanada Regular Member • Posts: 351
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

MF Assist and Focus Magnification Time

Enlarges the image on the screen automatically to make manual focusing easier.
This works in [Manual Focus] or [DMF] modes.
MENU 3 [MF Assist] desired mode
Turn the Control Ring to adjust the focus.

The image is enlarged 8.6 times. You can also enlarge the image 17.1 times by pressing on the control wheel.

On

Enlarges the image. You can set the enlarging duration using [Focus Magnif. Time].

Off
Does not enlarge the image.

 cllcanada's gear list:cllcanada's gear list
Sony RX100 Sony Cyber-shot DSC-HX400V ProCamera
jkuo Regular Member • Posts: 188
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

cllcanada wrote:

MF Assist and Focus Magnification Time

Enlarges the image on the screen automatically to make manual focusing easier.
This works in [Manual Focus] or [DMF] modes.

For some reason, my screen only gets enlarged automatically when turning the control ring in [Manual Focus], not [DMF] mode even though [MF Assist] is set to On. Are you sure MF Assist is also supposed to work in [DMF] mode? I don't see any reason why it shouldn't, but it doesn't work on my copy.

Carl bcn
Carl bcn OP New Member • Posts: 15
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Thanks for your replies. Seems DMF is doing the trick for me, although I loose the ability to use the front ring for aperture in Av, because the ring turns into focus control. Not that I care, but I only get the magnified view when in MF, not in DMF, as jkuo points out. Probably there could be a way to activate magnification here too, but since I don't want it, I haven't tried.

By the way, I have confirmed that the occasional shaky-bumpy feeling is indeed caused by the lens barrel when extended. If I put my finger on a side of it while holding the camera (as a way of providing "support" for the barrel) and then shake my hand up and down (not too fast), the bump is gone. Release the finger, shake again and there it is - slight, but noticeable.

As I said, it doesn't seem to be a real problem so far, but it still catches my attention everytime I suddenly move my hand and I feel it. For the price of this camera, one would expect better assembled pieces. I understand even some dslr mounts might have a slight play, but since we move the camera less often (and slower) than a compact, it's less noticeable, I guess.

I'll try to check with the store if all the copies are like mine, but I'll keep listening for other people experiences in this regard (the tighter or looser fit of the lens barrel in the body, when extended).

Craig Atkinson
Craig Atkinson Junior Member • Posts: 29
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

yes, DMF stops the focus issue, which is great. However, I would like the control ring to control A in A mode! Hmm

 Craig Atkinson's gear list:Craig Atkinson's gear list
Fujifilm X100S Ricoh GR Sony RX100 II
elliottnewcomb Forum Pro • Posts: 11,112
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

great post, I will try DMF, I suspect early samples slightly out of focus, or as someone said, focused on wrong thing, could have been improved with DMF

 elliottnewcomb's gear list:elliottnewcomb's gear list
Sony RX100 Sony RX1R Olympus Stylus 1 Sony Cyber-shot DSC-RX100 III +1 more
Carl bcn
Carl bcn OP New Member • Posts: 15
Re: RX100 - constant pre-focusing in af-s, display off and slight lens barrel play

Yes, as Craig points out, I later realised than using DMF changes the front ring function to manual focus, so we lose this control...

For now, I have chosen to put up with this "all time pre focusing" annoyance (this way I can at least assign something useful to the front ring). There seems to be nothing else that can be done in this regard... I can't understand how such a good camera can be made, while taking (IMHO) so bad design decisions (I can see absolutely no benefit in having the camera focusing everything all the time, in fact it doesn't make it focus any faster. Maybe it is useful for auto modes or people who don't half press for focusing?).

Keyboard shortcuts:
FForum MMy threads