Posted by
R. Ticle on
URL: https://www.es-forum.com/Camera-Motor-EMF-Cause-for-concern-tp1546119p1546133.html
Hi Bill, it does indeed have manual focus, and I've been using it,
besides, I think it's good to be able to do that - auto this, and auto
that these days... - but it would be nice to be able to use autofocus
for low light or fast moving objects. Thing is, every time the
shutter gets opened to take a picture, there's the same magnetic
discharge, I guess because the shutter's electronically controlled.
Still working on finding someone who can help. I can't imagine it'd
be too difficult to do with the knowledge of how to open one of these
up, I just need a willing person. I've sent out a lot of emails, but
the weekend's just ending here, so I've got to wait a bit.
Best,
R.
--- In
[hidden email], "Bill Bruno" <wbruno@...> wrote:
>
> Maybe it has a manual focus mode?
> Bill
>
> On Sat, Mar 8, 2008 at 4:13 PM, rticleone <rticleone@...> wrote:
>
> > Hey Bill,
> >
> > There is a 2.5" screen on the back, but because this is an SLR style
> > camera, it has to be held up to the head to "shoot", because you look
> > directly through the optical viewfinder. The screen is always off
> > when taking the picture.
> >
> > I hear you - I don't feel anything from using the camera, and most
> > people here so far have said they probably wouldn't worry about it.
> > It may not even go as high as it shows, because it's an outdated
> > meter. But - like I said in my last reply to someone else, I'd still
> > rather shield it.
> >
> > Best,
> >
> > R.
> >
> >
> > --- In
[hidden email] <eSens%40yahoogroups.com>, "Bill Bruno"
> > <wbruno@> wrote:
> > >
> > > I have heard of people reacting to cameras.
> > >
> > > What's probably important is the field inside your skull,
> > > i.e. try to put the meter where you brain is, not right up
> > > to the camera. But I would not want 3 milligauss even.
> > > Short exposure is better than long, but pulses can be bad.
> > >
> > > Having a screen on the back may be better, although a smaller
> > > screen could be safer compared to the new big ones.
> > > Bill
> > >
> > > On Thu, Mar 6, 2008 at 6:19 PM, rticleone <rticleone@> wrote:
> > >
> > > > I have really gotten into photography in the last couple of years.
> > > > With the advent of digital cameras, I am able to take pictures
without
> > > > dealing with developing chemicals, or the cost of many takes
in film
> > > > to keep one shot.
> > > >
> > > > I was recently gifted (birthday gifted) a Digital SLR Camera. It
> > > > works very well and takes great pictures.
> > > >
> > > > First thing I did was check it's EMF output. Very low electrical
> > > > fields. That can be dealt with simply. Great!, I thought.
> > > >
> > > > Then I check it's magnetic fields. And I thought, "sh*t!". Because
> > > > naturally whenever the lens focuses automatically, or the shutter
> > > > opens to take a picture, there is a burst of a magnetic field
from the
> > > > motor. I can't BELIEVE I didn't think of this before. Gah...
> > > >
> > > > It jumps to about 35 milligauss on average (meter up against the
> > > > camera, just like the face of whoever's using it - this is the
kind
> > > > where you look through the viewfinder, it's not a point and shoot
> > > > where you use the screen).
> > > >
> > > > Do I have reason to be concerned about these bursts of magnetic
> > > > fields? I mean, it's not constantly against my head, and they
last for
> > > > perhaps a second or less at a time, only when the shutter fires. I
> > > > can even get away from the motor focusing the lens most of the
time by
> > > > using manual focus and adjusting it by hand.
> > > >
> > > > Unfortunately, I can't just take this thing apart and try and
shield
> > > > the motor from the inside, myself. There is a very thin and
flexible
> > > > foil called Met Glas that sounds like it could be used for such a
> > > > purpose, but it's the matter of getting it inside that's the
issue.
> > > >
> > > > Maybe I can find a technician who's willing to do it?...Hmm...
> > > >
> > > > I can theoretically shield some parts of the camera from the
outside
> > > > with this material.
> > > >
> > > > But - what are your thoughts on these brief magnetic fields?
> > > >
> > > > Best,
> > > >
> > > > R.
> > > >
> > > >
> > > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>