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-   -   Zoom problem (https://www.dvinfo.net/forum/sony-nex-ea50-all-variants/514236-zoom-problem.html)

Joel Corral April 7th, 2013 09:52 PM

Re: Zoom problem
 
Quote:

Originally Posted by Noa Put (Post 1789190)
...one of them also being that inaccurate electronical focusing, it's like feeling in the dark for a light switch.

Noa,
Can you elaborate on the "inaccurate electronic focusing"? I haven't had any issues with auto focus... maybe I am missing understanding....
JC

Chris Harding April 7th, 2013 10:50 PM

Re: Zoom problem
 
Me neither!!

I have peaking on and the camera focuses perfectly every time .....maybe you are talking about the lens not being parafocal??? At that price no lens would be parafocal unless it has a backfocus ajustment like the JVC HM700 cameras ....If you zoom in tight and then zoom right out to wide it ain't gonna stay in focus until the AF catches up!!

Chris

Noa Put April 8th, 2013 06:29 AM

Re: Zoom problem
 
Quote:

Originally Posted by Joel Corral (Post 1789350)
Noa,
Can you elaborate on the "inaccurate electronic focusing"?

If I want to pertform a pull focus with the stock lens it can happen that a slight turn of the ring moves the focus point quite a bit and if I want to fine tune I need to turn the ring much more just to cover a small focus distance, with my primes I can do very accurate focus pulls and the distance I need to turn the ring to move a focus point is always the same. This makes pulling focus on the stocklens unreliable.

Chris Harding April 8th, 2013 07:46 AM

Re: Zoom problem
 
Aha!! So that's actually doing a manual focus pull on the stock lens so it's not electronic which is where the confusion lies..!! Servo zooms seem to have very sloppy focus rings and I'm not really sure if you are also dragging some of the servo linkages when you turn it even if you switch to manual.

I find it so much easier to focus pull on the spot focus function on the LCD ...touch the screen on item 1 then touch the screen on iten two and the camera does it for you!!

Chris

Darryl N. Barg April 8th, 2013 12:22 PM

Re: Zoom problem
 
I've noticed the jerk when changing zoom direction as well. I've tried putting my finger on it to provide some drag... wishful thinking... In the end, I will live with it, as I still think this camera and lens is a great deal... I'm coming from a camera with very little OSS, so I'm just thrilled I can get away with what I can without the tripod... and zoom. It's still a bit like magic to me.

darryl

Martyn Moore April 8th, 2013 01:27 PM

Re: Zoom problem
 
Totally agree, Chris. Touch screen AF was the greatest discovery on my Panasonic and will stand me in good stead with the Sony, I'm sure.

Anybody tried the focus transition feature that allows you to set a time interval? I like the idea of it, but suspect I'll just work with whatever the touch screen mode provides.

Noa Put April 8th, 2013 01:31 PM

Re: Zoom problem
 
Spot focus is not smooth in transition as manual refocus, it's ok if you want to quickly refocus but if you want to do it right, you do it manually. Also spot focus is not 100% accurate all the time because it's result also depend on sufficient light or how large the area is you need to refocus on. Only focus transition should be better as your start and end focus point will always be dead on but it takes more time to dial in which I usually don't have.

Serggio Lamas June 2nd, 2014 01:59 PM

Re: Zoom problem
 
Quote:

Originally Posted by Noa Put (Post 1778447)
I have reported this problem when I just got the camera (when I was filming at that casino) and I just saw another user complaining about it on Vimeo, has anyone else noticed this problem on their camera s well?

This is the video showing the problem:
Sony NEX-EA50 Horrible Lens Problem on Vimeo

2-6-14 Today I got the camera in first test,i have the some problem with the zoom in out in lens,
I noticed this problem in the first record when I just got the camera.
from the first video record was disappointed with this problem that makes the lens to zoom in out.
what to do? send it back to Sony for repair???
you with the same problem that you solved?
help please.....

Noa Put June 2nd, 2014 02:47 PM

Re: Zoom problem
 
I don't have the camera anymore but know that lens issue was "normal" behaviour as many users reported the problem, it does seem that not all lenses are equally bad but I"m sure Sony will say it's within a normal limit for this type of lens but it depends ofcourse how worse it is, can you post a video showing the problem you have?

Serggio Lamas June 2nd, 2014 02:58 PM

Re: Zoom problem
 
is the same problem as in this video when zoom in and out

Noa Put June 2nd, 2014 03:10 PM

Re: Zoom problem
 
That's normal, my lens also had that same problem. It has to do with the design of the lens, you cannot compare it with a fixed lens on a videocamera that have variable and very smooth zoom speeds. I always operated the zoom manually on the ea50 which did work surprisingly well.

Michael Spanheimer June 3rd, 2014 06:44 AM

Re: Zoom problem
 
In the anouncement of the Sony SELP18105 it was said, that it wont have that zoom issue...
and it zooms faster... Can anyone confirm that?

Serggio Lamas June 4th, 2014 06:11 AM

Re: Zoom problem
 
What use this button? H M L
http://static.bhphoto.com/images/mul...IMG_298999.jpg

Marlon Martins June 4th, 2014 06:22 AM

Re: Zoom problem
 
high, medium, low. is the speed of the zoom controller, the slider right next to it.

for use on cameras with no rocker zoom, like compact photo cameras

Matt Sharp June 4th, 2014 02:00 PM

Re: Zoom problem
 
Quote:

Originally Posted by Michael Spanheimer (Post 1847599)
In the anouncement of the Sony SELP18105 it was said, that it wont have that zoom issue...
and it zooms faster... Can anyone confirm that?

I can confirm the 18-105 doesn't drop focus like the 18200. It isn't parfocal either, the focus shifts quite a bit when zooming (in MF mode).

Peter Rush June 5th, 2014 01:51 AM

Re: Zoom problem
 
Quote:

Originally Posted by Marlon Martins (Post 1847731)
high, medium, low. is the speed of the zoom controller, the slider right next to it.

for use on cameras with no rocker zoom, like compact photo cameras

On my EA50 whatever I set this switch to - the zoom travels at the same rate - It's useless.

Steven Digges June 5th, 2014 12:10 PM

Re: Zoom problem
 
Peter,

As Marlin said that switch only affect the slider switch next to it. It is not supposed to effect your rocker speed. If it does not change the slider switch speed something is wrong. But it is not there for the EA50 anyway.

Steve

Chris Harding June 5th, 2014 07:11 PM

Re: Zoom problem
 
Hi Pete

Power Zoom speed is set via the menu the HML switch as Steve says is for the manual slide switch on the lens .... You will find the Power Zoom settings in the menu options and they do work but remember that the power zoom rocker itself is progressive!

Chris

Steven Digges June 5th, 2014 08:06 PM

Re: Zoom problem
 
The zoom problem does seem to be luck of the draw. This tread caused me to test mine. I don't have the problem. It may be there to a small extent, but it does NOT look like the clip posted above.

Steve

Chris Harding June 5th, 2014 08:24 PM

Re: Zoom problem
 
Hi Steve

I have also never had the issue on either of my cameras using the stock lens! Then again I rarely zoom while filming I think it's more noticeable on a fast zoom (on H) as the power zoom engages so some lens might have a bit of play in the gearing network? If I do zoom it's really, really slow so that's probably why I never see it ...apart from a very rare zoom while filming I only use the zoom for framing so I would see the issue.

If it does happen then a simple workaround would be to zoom first and film once you have framed or simply zoom slowly. The rocker is progressive so a light touch on the switch starts the zoom very slowly and then you can speed up once the "slack bit" is past.

Chris

Serggio Lamas June 6th, 2014 07:07 AM

Re: Zoom problem
 
today sent me a new lens but the problem remains and the new lens

Noa Put June 6th, 2014 08:50 AM

Re: Zoom problem
 
Like I said, it's not a problem but more a design limitation, many users, including me had reported this "issue" on the stocklens but it appears to just be like that.

Michael Spanheimer June 9th, 2014 01:10 PM

Re: Zoom problem
 
Quote:

Originally Posted by Matt Sharp (Post 1847776)
I can confirm the 18-105 doesn't drop focus like the 18200. It isn't parfocal either, the focus shifts quite a bit when zooming (in MF mode).

Is the zoom also faster? I mean the velocity of the zooming...


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