What happened?

[David H. Lipman]

The problem is this is NOT a binaries News Group. That means you are not allowed to post
binary files.

If you see the name "binaries" in the name of the News Group then posting attachments is
allowed. If you don't then posting attachments is not allowed.

In addition, the News Group Charter/FAQ states that binary attachments are not permitted.
[url]http://tinyurl.com/6sayd[/url]

Pertinent Excerpt:
------------------
What Is Not Permitted:

- Posts from mail2news gateways and/or anonymous remailers
- Flame wars (comparisons between different digital SLR brands or
systems are permitted as long as they do not degenerate into personal
flames)
- Signatures with more than 4 lines
- Exchange and/or discussion of illegal software
- Personal attacks
- Binary postings (i.e. non text postings) other than PGP and small binary
signatures
- Commercial advertisements:


Dave



"Kent McPherson" <bigk@kentmcpherson.com> wrote in message
news:WoqdnQidsNorFzXcRVn-tg@comcast.com...
| I got a Canon Digital Rebel a couple months ago and I've had this happen
| twice. When using the built-in flash, it's like the picture gets half
| exposed, i.e. half the picture is lighted and half is not. I've attached a
| sample so you can see what I'm talk about. The picture is safe. Any ideas?
|
|
|

[Jim]

Your using to fast a shutter speed.
"David H. Lipman" <DLipman~nospam~@Verizon.Net> wrote in message
news:b50qd.435$dv5.149@trnddc07...

> The problem is this is NOT a binaries News Group. That means you are not
> allowed to post
> binary files.
>
> If you see the name "binaries" in the name of the News Group then posting
> attachments is
> allowed. If you don't then posting attachments is not allowed.
>
> In addition, the News Group Charter/FAQ states that binary attachments are
> not permitted.
> [url]http://tinyurl.com/6sayd[/url]
>
> Pertinent Excerpt:
> ------------------
> What Is Not Permitted:
>
> - Posts from mail2news gateways and/or anonymous remailers
> - Flame wars (comparisons between different digital SLR brands or
> systems are permitted as long as they do not degenerate into personal
> flames)
> - Signatures with more than 4 lines
> - Exchange and/or discussion of illegal software
> - Personal attacks
> - Binary postings (i.e. non text postings) other than PGP and small binary
> signatures
> - Commercial advertisements:
>
>
> Dave
>
>
>
> "Kent McPherson" <bigk@kentmcpherson.com> wrote in message
> news:WoqdnQidsNorFzXcRVn-tg@comcast.com...
> | I got a Canon Digital Rebel a couple months ago and I've had this happen
> | twice. When using the built-in flash, it's like the picture gets half
> | exposed, i.e. half the picture is lighted and half is not. I've
> attached a
> | sample so you can see what I'm talk about. The picture is safe. Any
> ideas?
> |
> |
> |
>
>

[Alan Browne]

Kent McPherson wrote:

> I got a Canon Digital Rebel a couple months ago and I've had this happen
> twice. When using the built-in flash, it's like the picture gets half
> exposed, i.e. half the picture is lighted and half is not. I've attached a
> sample so you can see what I'm talk about. The picture is safe. Any ideas?

It looks like vignetting created by the lens hood and use of built in flash.
Eg: somthing is blocking the flash light from getting to the scene. For flash
shots the lens hood can be removed. (Or your hand controlling the zoom blocked
the flash).

Better yet, use an accessory flash ant point it up 45-60 deg. at the white
ceiling for a softer light, gentler shaddows, no red eye and some BG fill.

NOTE: Posting images here is not permitted. Put your images on a website and
post the link to the website (your own site or [url]www.photo.net[/url], pbase, etc.)

Cheers,
Alan.

--
-- r.p.e.35mm user resource: [url]http://www.aliasimages.com/rpe35mmur.htm[/url]
-- r.p.d.slr-systems: [url]http://www.aliasimages.com/rpdslrsysur.htm[/url]
-- [SI] gallery: [url]http://www.pbase.com/shootin[/url]
-- [SI] rulz: [url]http://www.aliasimages.com/si/rulz.html[/url]
-- e-meil: there's no such thing as a FreeLunch.

[Alan Browne]

Jim wrote:

> Your using to fast a shutter speed.

No: that would produce a straight line and a totally dark area where the shutter
covers the sensor.

He 'vigenetted' the flash, either with his hand or the lens hood.

Cheers,
Alan


--
-- r.p.e.35mm user resource: [url]http://www.aliasimages.com/rpe35mmur.htm[/url]
-- r.p.d.slr-systems: [url]http://www.aliasimages.com/rpdslrsysur.htm[/url]
-- [SI] gallery: [url]http://www.pbase.com/shootin[/url]
-- [SI] rulz: [url]http://www.aliasimages.com/si/rulz.html[/url]
-- e-meil: there's no such thing as a FreeLunch.

[Andrew Koenig]

"Kent McPherson" <bigk@kentmcpherson.com> wrote in message
news:WoqdnQidsNorFzXcRVn-tg@comcast.com...

>I got a Canon Digital Rebel a couple months ago and I've had this happen
> twice. When using the built-in flash, it's like the picture gets half
> exposed, i.e. half the picture is lighted and half is not. I've attached
> a
> sample so you can see what I'm talk about. The picture is safe. Any
> ideas?

You are using your lens at a wide-angle setting with the hood attached. The
hood is casting a shadow on your subject.

Here is an easy way to determine whether there will be a problem. Set the
lens at whatever focal length you intend to use, extend the flash, install
your lens hood, and stand in front of a mirror at half the distance you
intend to use for your subject.

Now look at your reflection through the finder. Move the camera so that the
flash is at the lower edge of the frame, and maneuver the camera so that the
flash "moves" along the entire lower edge. If you can see the flash
regardless of where on the lower edge it is, you're fine. If you can't, it
will be obvious why.

[Kent McPherson]

Sorry about the file. I just put 3 samples on my website. They can be
viewed at [url]http://www.kentmcpherson.com/rebel.htm[/url].

I don't have a lens hood. I don't think my hand blocked the flash although
I guess it could have. I'll have to be more aware of that. If there are any
other ideas, I'm sure open to them.

Thanks!

"Alan Browne" <alan.browne@freelunchVideotron.ca> wrote in message
news:coa7v2$5et$1@inews.gazeta.pl...

> Kent McPherson wrote:
>

> > I got a Canon Digital Rebel a couple months ago and I've had this happen
> > twice. When using the built-in flash, it's like the picture gets half
> > exposed, i.e. half the picture is lighted and half is not. I've

attached a

> > sample so you can see what I'm talk about. The picture is safe. Any

ideas?

>
> It looks like vignetting created by the lens hood and use of built in

flash.

> Eg: somthing is blocking the flash light from getting to the scene. For

flash

> shots the lens hood can be removed. (Or your hand controlling the zoom

blocked

> the flash).
>
> Better yet, use an accessory flash ant point it up 45-60 deg. at the white
> ceiling for a softer light, gentler shaddows, no red eye and some BG fill.
>
> NOTE: Posting images here is not permitted. Put your images on a website

and

> post the link to the website (your own site or [url]www.photo.net[/url], pbase, etc.)
>
> Cheers,
> Alan.
>
> --
> -- r.p.e.35mm user resource: [url]http://www.aliasimages.com/rpe35mmur.htm[/url]
> -- r.p.d.slr-systems: [url]http://www.aliasimages.com/rpdslrsysur.htm[/url]
> -- [SI] gallery: [url]http://www.pbase.com/shootin[/url]
> -- [SI] rulz: [url]http://www.aliasimages.com/si/rulz.html[/url]
> -- e-meil: there's no such thing as a FreeLunch.

[David H. Lipman]

I think it is your hand. Notice the curvature of the shadow.

Dave



"Kent McPherson" <bigk@kentmcpherson.com> wrote in message
news:Wd-dnQlUeZAGMzXcRVn-jw@comcast.com...
| Sorry about the file. I just put 3 samples on my website. They can be
| viewed at [url]http://www.kentmcpherson.com/rebel.htm[/url].
|
| I don't have a lens hood. I don't think my hand blocked the flash although
| I guess it could have. I'll have to be more aware of that. If there are any
| other ideas, I'm sure open to them.
|
| Thanks!

[DINO SINATORE]

Kent,

Were you wearing a hat? This happened to me when I was wearing a hat and
blocked the flash.

Just a thought.

Dino


"Kent McPherson" <bigk@kentmcpherson.com> wrote in message
news:WoqdnQidsNorFzXcRVn-tg@comcast.com...

>I got a Canon Digital Rebel a couple months ago and I've had this happen
> twice. When using the built-in flash, it's like the picture gets half
> exposed, i.e. half the picture is lighted and half is not. I've attached
> a
> sample so you can see what I'm talk about. The picture is safe. Any
> ideas?
>
>
>

[Tom Nelson]

Kent, I didn't see your original post, so didn't see the photo. But
this sounds like you shot at a shutter speed faster than 1/200 sec.
Like most SLRs, the Rebel uses a focal plane shutter: two curtain-like
devices which hide or expose the sensor to light from the lens.

At slow shutter speeds, the first curtain opens, then there's a time
delay before the second curtain follows it, blocking the light.

On the Rebel, at speeds faster than 1/200, the second curtain moves
into the picture area before the first curtain has opened. There is no
instant when the entire sensor is uncovered. If the flash fires during
that time you will get only partial illumination.

Tom Nelson
Tom Nelson Photography

> "Kent McPherson" <bigk@kentmcpherson.com> wrote in message
> news:WoqdnQidsNorFzXcRVn-tg@comcast.com...

> >I got a Canon Digital Rebel a couple months ago and I've had this happen
> > twice. When using the built-in flash, it's like the picture gets half
> > exposed, i.e. half the picture is lighted and half is not. I've attached
> > a
> > sample so you can see what I'm talk about. The picture is safe. Any
> > ideas?
> >
> >
> >

>
>

[Alan Browne]

Tom Nelson wrote:

> Kent, I didn't see your original post, so didn't see the photo. But
> this sounds like you shot at a shutter speed faster than 1/200 sec.
> Like most SLRs, the Rebel uses a focal plane shutter: two curtain-like
> devices which hide or expose the sensor to light from the lens.
>
> At slow shutter speeds, the first curtain opens, then there's a time
> delay before the second curtain follows it, blocking the light.
>
> On the Rebel, at speeds faster than 1/200, the second curtain moves
> into the picture area before the first curtain has opened. There is no
> instant when the entire sensor is uncovered. If the flash fires during
> that time you will get only partial illumination.

Look at the photo again... there is a) exposure in the dark area; so it is not
blocked by the shutter and b) the blocked area is curved. The vignetting was
created by a hand or a camera strap blocking the built-in flash... (not the lens
hood as the user says he wasn't using it).

--
-- r.p.e.35mm user resource: [url]http://www.aliasimages.com/rpe35mmur.htm[/url]
-- r.p.d.slr-systems: [url]http://www.aliasimages.com/rpdslrsysur.htm[/url]
-- [SI] gallery & rulz: [url]http://www.pbase.com/shootin[/url]
-- e-meil: there's no such thing as a FreeLunch.

[Hunt]

In article <coa82l$5et$2@inews.gazeta.pl>, [email]alan.browne@freelunchVideotron.ca[/email]
says...

>
>Jim wrote:
>

>> Your using to fast a shutter speed.

>
>No: that would produce a straight line and a totally dark area where the

shutter

>
>covers the sensor.
>
>He 'vigenetted' the flash, either with his hand or the lens hood.
>
>Cheers,
>Alan

Exactly. If one uses the built-in flash, and, say the lens hood for the 12-24
Nikkor, they will get a variation of this shadow, every time.

Hunt

[Hunt]

In article <Wd-dnQlUeZAGMzXcRVn-jw@comcast.com>, [email]bigk@kentmcpherson.com[/email] says
....

>
>Sorry about the file. I just put 3 samples on my website. They can be
>viewed at [url]http://www.kentmcpherson.com/rebel.htm[/url].
>
>I don't have a lens hood. I don't think my hand blocked the flash although
>I guess it could have. I'll have to be more aware of that. If there are any
>other ideas, I'm sure open to them.
>
>Thanks!
>
>"Alan Browne" <alan.browne@freelunchVideotron.ca> wrote in message
>news:coa7v2$5et$1@inews.gazeta.pl...

>> Kent McPherson wrote:
>>

>> > I got a Canon Digital Rebel a couple months ago and I've had this happen
>> > twice. When using the built-in flash, it's like the picture gets half
>> > exposed, i.e. half the picture is lighted and half is not. I've

>attached a

>> > sample so you can see what I'm talk about. The picture is safe. Any

>ideas?

>>
>> It looks like vignetting created by the lens hood and use of built in

>flash.

>> Eg: somthing is blocking the flash light from getting to the scene. For

>flash

>> shots the lens hood can be removed. (Or your hand controlling the zoom

>blocked

>> the flash).
>>
>> Better yet, use an accessory flash ant point it up 45-60 deg. at the white
>> ceiling for a softer light, gentler shaddows, no red eye and some BG fill.
>>
>> NOTE: Posting images here is not permitted. Put your images on a website

>and

>> post the link to the website (your own site or [url]www.photo.net[/url], pbase, etc.)
>>
>> Cheers,
>> Alan.

The "object" (lens hood, hand, etc.) blocked 1 & 2. Number 2 & 3 were
underexposed. It does appear, however, that you eliminated the shadow
producing object in #3, but the image was underexposed.

Hunt

[Hunt]

In article <95vhq015nveqhsi0ub9a9unof0r9moho5j@4ax.com>, [email]nop@alt.net[/email] says...

>
>Kibo informs me that "Kent McPherson" <bigk@kentmcpherson.com> stated
>that:
>

>>Sorry about the file. I just put 3 samples on my website. They can be
>>viewed at [url]http://www.kentmcpherson.com/rebel.htm[/url].
>>
>>I don't have a lens hood. I don't think my hand blocked the flash although
>>I guess it could have. I'll have to be more aware of that. If there are any
>>other ideas, I'm sure open to them.

>
>Something has obviously gotten between the flash & the subject. Given
>that you were shooting vertically, & the shadow is appearing in
>different places, I'd guess that the camera strap was dangling in front
>of the flash. You can prevent that by either keeping it around your neck
>or making sure that it's hanging *behind* the camera, instead of in
>front of it.

Yes, could well be. I had to mount a Hassleblad angle release cable attachment
to all of my LF WA lenses in recessed boards, because the dang cable would
seem to always get into the corner of each exposure.

At first, I thought it was the lens shade (in vertical, it was in the right
position), but now, I think you are closer to the problem.

Hunt