Photoshop How To Use: rec.photo.digital - 25 new messages in 9 topics

rec.photo.digital
http://groups.google.com/group/rec.photo.digital?hl=en

rec.photo.digital@googlegroups.com

Today's topics:

==============================================================================
TOPIC: Focus Confirmation
http://groups.google.com/group/rec.photo.digital/t/e4cdfb75a347ac36?hl=en
==============================================================================

== 1 of 5 ==
Date: Wed, Apr 22 2009 6:26 am
From: Eugene

Hi,

In Canon DSLR, there is a Focus Confirmation
dot in the viewfinder. Supposed you are using
Manual Focus. Does this Focus Confirmation
works by Phase-Difference Sensor with
AF lights or does it use Contrast Detection
like in those models with Live View Mode?
(or other mechanisms that doesn't use
the two?

== 2 of 5 ==
Date: Wed, Apr 22 2009 6:59 am
From: John Passaneau

Eugene wrote:
> Hi,
>
> In Canon DSLR, there is a Focus Confirmation
> dot in the viewfinder. Supposed you are using
> Manual Focus. Does this Focus Confirmation
> works by Phase-Difference Sensor with
> AF lights or does it use Contrast Detection
> like in those models with Live View Mode?
> (or other mechanisms that doesn't use
> the two?
>
> E

It uses the same sensor that is used for auto focus. The
Phase-Difference method is used in the live view mode because the
mirror is up in live view and the auto focus sensor is blocked. In
manual focus the mirror is down and the auto focus sensor is active.

John Passaneau

== 3 of 5 ==
Date: Wed, Apr 22 2009 7:46 am
From: Eugene

On Apr 22, 9:59 pm, John Passaneau <jx...@psu.edu> wrote:
> Eugene wrote:
> > Hi,
>
> > In Canon DSLR, there is a Focus Confirmation
> > dot in the viewfinder. Supposed you are using
> > Manual Focus. Does this Focus Confirmation
> > works by Phase-Difference Sensor with
> > AF lights or does it use Contrast Detection
> > like in those models with Live View Mode?
> > (or other mechanisms that doesn't use
> > the two?
>
> > E
>
> It uses the same sensor that is used for auto focus. The
> Phase-Difference method is used in the live view mode because the
> mirror is up in live view and the auto focus sensor is blocked. In
> manual focus the mirror is down and the auto focus sensor is active.
>
> John Passaneau

But how could that be. In manual focus, no infrared light is
sent to the subject to gauge distance because it is
manual focus in the first place where you are the one
to adjust the distance. Also I'm talking about the focus
confirmation in other Canon without Live View like
the 20D, etc.

== 4 of 5 ==
Date: Wed, Apr 22 2009 8:44 am
From: "Hans Kruse"

Eugene wrote:
> On Apr 22, 9:59 pm, John Passaneau <jx...@psu.edu> wrote:
>
> But how could that be. In manual focus, no infrared light is
> sent to the subject to gauge distance because it is
> manual focus in the first place where you are the one
> to adjust the distance. Also I'm talking about the focus
> confirmation in other Canon without Live View like
> the 20D, etc.
>
The auto focus on a dslr does not work by sending an infraread light to the
subject. Read the explanation of phase detection auto focus here
http://en.wikipedia.org/wiki/Autofocus

--
Med venlig hilsen/Kind regards,
Hans Kruse www.hanskrusephotography.com, www.hanskruse.com

== 5 of 5 ==
Date: Wed, Apr 22 2009 9:45 am
From: John Passaneau

Eugene wrote:
> On Apr 22, 9:59 pm, John Passaneau <jx...@psu.edu> wrote:
>> Eugene wrote:
>>> Hi,
>>> In Canon DSLR, there is a Focus Confirmation
>>> dot in the viewfinder. Supposed you are using
>>> Manual Focus. Does this Focus Confirmation
>>> works by Phase-Difference Sensor with
>>> AF lights or does it use Contrast Detection
>>> like in those models with Live View Mode?
>>> (or other mechanisms that doesn't use
>>> the two?
>>> E
>> It uses the same sensor that is used for auto focus. The
>> Phase-Difference method is used in the live view mode because the
>> mirror is up in live view and the auto focus sensor is blocked. In
>> manual focus the mirror is down and the auto focus sensor is active.
>>
>> John Passaneau
>
> But how could that be. In manual focus, no infrared light is
> sent to the subject to gauge distance because it is
> manual focus in the first place where you are the one
> to adjust the distance. Also I'm talking about the focus
> confirmation in other Canon without Live View like
> the 20D, etc.
>
> E

That is because Canon DSLR's don't use infrared light to auto focus.
It's auto focus sensors are passive. This is why in low light the auto
focus becomes slow or doesn't work.

John Passaneau

==============================================================================
TOPIC: Canon DSLR Live View
http://groups.google.com/group/rec.photo.digital/t/21ca0cd9457ba13c?hl=en
==============================================================================

== 1 of 7 ==
Date: Wed, Apr 22 2009 7:17 am
From: Pat

On Apr 22, 7:04 am, Eugene <eugenhug...@gmail.com> wrote:
> Hi,
>
> Canon Live View in the 1000D/XS for example
> can give live view in the LCD rather than
> optical viewfinder. How come previous Digital
> SLR didn't make this feature available?
>
> Also anyone owns any one of these Canon Live View DSLR?
>
> I'd use a 1000mm f/10 Russian Telephoto on
> it. Can the contrast autofocus work? The
> telephoto is manual and have to turn it
> manually. So I guess that I can see the view
> direclty in the LCD to see the best focus?
> What then is the function of Contrast or
> AF autofocus in this case?
>
> Thanks.
>
> E.

I have live view and frankly, don't know what all of the fuss is
about. It has very little usefulness.

So you're out with your 1000mm lens. Good. And it's on a tripod,
because it is, after all, a 1000 mm lens. So what real advantage does
live view have -- esp. in daylight where you can't see it as well. It
really isn't too difficult to look through the viewfinder and get a
much better view of the picture.

== 2 of 7 ==
Date: Wed, Apr 22 2009 8:15 am
From: Dave Cohen

N wrote:
> "Eugene" <eugenhughes@gmail.com> wrote in message
> news:a61171bc-8d5f-43e5-aae1-8d54f913ad9a@v35g2000pro.googlegroups.com...
> On Apr 22, 7:28 pm, "N" <N...@onyx.com> wrote:
>> "Eugene" <eugenhug...@gmail.com> wrote in message
>>
>> news:6c6c28aa-a852-4739-a050-2b5d2daa24c7@z16g2000prd.googlegroups.com...
>>
>> > Hi,
>>
>> > Canon Live View in the 1000D/XS for example
>> > can give live view in the LCD rather than
>> > optical viewfinder. How come previous Digital
>> > SLR didn't make this feature available?
>>
>> For the same reason that climate control wasn't available on a Model-T
>> Ford.

They were too busy designing the Model-T automatic transmission. Didn't
sell well, people just just loved the satisfying crunch of their crash
gearbox.
This is another of those 'why' posts like the measekite series.
Dave Cohen
>
> All predecessors and point&shoot use Live View.
> If what the XS did is simply hold the mirror upward
> while the view is being seen live. Earlier model
> could have use such simple principle like in
> Canon 300D.
>
> E
>
>
> Yes, sure, and Henry could have put a full roof and sides on the M-T.
> Oh, and why wan't there a sensor in your first film camera?
>

== 3 of 7 ==
Date: Wed, Apr 22 2009 9:11 am
From: nospam

In article
<a61171bc-8d5f-43e5-aae1-8d54f913ad9a@v35g2000pro.googlegroups.com>,
Eugene <eugenhughes@gmail.com> wrote:

> All predecessors and point&shoot use Live View.
> If what the XS did is simply hold the mirror upward
> while the view is being seen live. Earlier model
> could have use such simple principle like in
> Canon 300D.

earlier dslr sensors were not capable of live view. compact p&s
cameras used a different sensor technology.

== 4 of 7 ==
Date: Wed, Apr 22 2009 9:13 am
From: nospam

In article
<41013a87-9d0e-40e2-8d30-a673c2687c23@x5g2000yqk.googlegroups.com>, Pat
<groups@artisticphotography.us> wrote:

> I have live view and frankly, don't know what all of the fuss is
> about. It has very little usefulness.
>
> So you're out with your 1000mm lens. Good. And it's on a tripod,
> because it is, after all, a 1000 mm lens. So what real advantage does
> live view have -- esp. in daylight where you can't see it as well. It
> really isn't too difficult to look through the viewfinder and get a
> much better view of the picture.

macro is one scenario where live view is fantastic.

== 5 of 7 ==
Date: Wed, Apr 22 2009 9:22 am
From: "J. Clarke"

Dave Cohen wrote:
> N wrote:
>> "Eugene" <eugenhughes@gmail.com> wrote in message
>> news:a61171bc-8d5f-43e5-aae1-8d54f913ad9a@v35g2000pro.googlegroups.com...
>> On Apr 22, 7:28 pm, "N" <N...@onyx.com> wrote:
>>> "Eugene" <eugenhug...@gmail.com> wrote in message
>>>
>>> news:6c6c28aa-a852-4739-a050-2b5d2daa24c7@z16g2000prd.googlegroups.com...
>>>
>>>> Hi,
>>>
>>>> Canon Live View in the 1000D/XS for example
>>>> can give live view in the LCD rather than
>>>> optical viewfinder. How come previous Digital
>>>> SLR didn't make this feature available?
>>>
>>> For the same reason that climate control wasn't available on a
>>> Model-T Ford.
>
> They were too busy designing the Model-T automatic transmission.
> Didn't sell well, people just just loved the satisfying crunch of
> their crash gearbox.

The Model T did not have a "crash gearbox". The shift mechanism was in fact
very similar to that used in most automatic transmissions.

> This is another of those 'why' posts like the measekite series.
> Dave Cohen
>>
>> All predecessors and point&shoot use Live View.
>> If what the XS did is simply hold the mirror upward
>> while the view is being seen live. Earlier model
>> could have use such simple principle like in
>> Canon 300D.
>>
>> E
>>
>>
>> Yes, sure, and Henry could have put a full roof and sides on the M-T.
>> Oh, and why wan't there a sensor in your first film camera?

== 6 of 7 ==
Date: Wed, Apr 22 2009 10:03 am
From: Savageduck

On 2009-04-22 09:22:21 -0700, "J. Clarke" <jclarke.usenet@cox.net> said:

> Dave Cohen wrote:
>> N wrote:
>>> "Eugene" <eugenhughes@gmail.com> wrote in message
>>> news:a61171bc-8d5f-43e5-aae1-8d54f913ad9a@v35g2000pro.googlegroups.com...
>>> On Apr 22, 7:28 pm, "N" <N...@onyx.com> wrote:
>>>> "Eugene" <eugenhug...@gmail.com> wrote in message
>>>>
>>>> news:6c6c28aa-a852-4739-a050-2b5d2daa24c7@z16g2000prd.googlegroups.com...
>>>>
>>>>> Hi,
>>>>
>>>>> Canon Live View in the 1000D/XS for example
>>>>> can give live view in the LCD rather than
>>>>> optical viewfinder. How come previous Digital
>>>>> SLR didn't make this feature available?
>>>>
>>>> For the same reason that climate control wasn't available on a
>>>> Model-T Ford.
>>
>> They were too busy designing the Model-T automatic transmission.
>> Didn't sell well, people just just loved the satisfying crunch of
>> their crash gearbox.
>
> The Model T did not have a "crash gearbox". The shift mechanism was in
> fact very similar to that used in most automatic transmissions.

Yup. A planetary gear transmission run with drive belts, all pedal &
lever controlled. No clutch. This included a middle pedal which had
to be depressed to engage and maintain reverse.

>
>> This is another of those 'why' posts like the measekite series.
>> Dave Cohen
>>>
>>> All predecessors and point&shoot use Live View.
>>> If what the XS did is simply hold the mirror upward
>>> while the view is being seen live. Earlier model
>>> could have use such simple principle like in
>>> Canon 300D.
>>>
>>> E
>>>
>>>
>>> Yes, sure, and Henry could have put a full roof and sides on the M-T.
>>> Oh, and why wan't there a sensor in your first film camera?

--
Regards,
Savageduck

== 7 of 7 ==
Date: Wed, Apr 22 2009 12:08 pm
From: Chris Malcolm

Eugene <eugenhughes@gmail.com> wrote:

> Canon Live View in the 1000D/XS for example
> can give live view in the LCD rather than
> optical viewfinder. How come previous Digital
> SLR didn't make this feature available?

Why don't the previous DSLRs with live view LCD count as "making this
feature available"?

--
Chris Malcolm

==============================================================================
TOPIC: Cardinal Holding a Bouquet of Flowers
http://groups.google.com/group/rec.photo.digital/t/a0b95d675dabf1d2?hl=en
==============================================================================

== 1 of 1 ==
Date: Wed, Apr 22 2009 7:44 am
From: ray

On Wed, 22 Apr 2009 09:15:54 -0400, M-M wrote:

> Uncropped, reduced in size.
>
> http://www.netaxs.com/~mhmyers/d80/DSC_18086w.jpg

Great - now how about one with the pope?

==============================================================================
TOPIC: New Mandate: Punography
http://groups.google.com/group/rec.photo.digital/t/e22297df98c46fc4?hl=en
==============================================================================

== 1 of 2 ==
Date: Wed, Apr 22 2009 7:51 am
From: Savageduck

On 2009-04-22 04:02:14 -0700, "whisky-dave" <whisky-dave@final.front.ear> said:

>
> "Bruce" <no@nospam.net> wrote in message
> news:4tbru4pbk121c5vqin52q7laoa30i6podh@4ax.com...
>> Paul Furman <paul-@-edgehill.net> wrote:
>>>
>>> Fish puns anyone?
>>
>>
>> The only fish puns I know would be better not repeated here. ;-)
>
> you, mean this isn't the write plaice.

You poor soul, you are solely without sole.
--
Regards,
Savageduck

== 2 of 2 ==
Date: Wed, Apr 22 2009 11:41 am
From: Alan Browne

Leon@here.com wrote:
> On Mon, 20 Apr 2009 22:26:21 -0400, Alan Browne
> <alan.browne@Freelunchvideotron.ca> wrote:
>
>> Leon@here.com wrote:
>>
>>> They say we use 2 halves of our brain differently, one for language and one for
>>> graphics. I confess I'm better at graphics than language! When someone asks me
>>> to explain what I mean, I often grab a pencil and paper to draw what I mean. I
>>> always thought it was because I didn't know the words!
>> Paint the following words: " Red " in blue paint
>> " Green " in purple paint
>> " Yellow " in red ...
>> etc.
>>
>> And ask people to tell you the color that the word in painted in...
>>
>> Some people do it without a pause, others are so caught by the word they
>> have to think for a second or two to name the color.
>
> I have a copy of that test here somewhere, I can do iit but it's hard for me!

When I took the test I blew (not blue) the first word. Got 'it' and
then "reprogrammed" my response and went through the rest with only a
little delay on each color.

People who read by taking in several words at a time seem to have the
most difficulty with this. The word just swamps their attention and
overrides the interpretation of the colour.

--
-- r.p.e.35mm user resource: http://www.aliasimages.com/rpe35mmur.htm
-- r.p.d.slr-systems: http://www.aliasimages.com/rpdslrsysur.htm
-- [SI] gallery & rulz: http://www.pbase.com/shootin
-- e-meil: Remove FreeLunch.
-- usenet posts from gmail.com and googlemail.com are filtered out.

==============================================================================
TOPIC: Replica watches from PrettyReplica.com
http://groups.google.com/group/rec.photo.digital/t/a4dad8ce75decf4a?hl=en
==============================================================================

== 1 of 1 ==
Date: Wed, Apr 22 2009 8:27 am
From: "PrettyReplica.com"

Replica Watches,Fake Watches,Replica Watch,Fake Watch,Wholesale
Watches,Wholesale Replica Watches,Jewelry Watches,Replica Jewelry
Watches.
Replica Watches,Fake Watch,Brand Replica,Sale Price,Discount watches
/www.prettyreplica.com Replica Watches
www.prettyreplica.com
Discount Watches
www.prettyreplica.com
Luxury Watches
www.prettyreplica.com
Best Watches

==============================================================================
TOPIC: what is full frame? No this is NOT a Troll
http://groups.google.com/group/rec.photo.digital/t/1d4bed118a3e3f05?hl=en
==============================================================================

== 1 of 2 ==
Date: Wed, Apr 22 2009 9:15 am
From: nospam

In article <XeFjBYBtAs7JFA1b@phaedsys.demon.co.uk>, Chris H
<chris@phaedsys.org> wrote:

> >Exactly. When I think "full frame" I think 6 x 7 cm.
>
> That was my point. It is relative. So the DX size sensor is "full frame"
> for DSLR's and all this rubbish about going "full [35mm]frame" is just
> marketing.

then a compact p&s is full frame. and cellphone cameras are full
frame. the word loses meaning.

== 2 of 2 ==
Date: Wed, Apr 22 2009 10:15 am
From: Chris H

In message <220420091215552991%nospam@nospam.invalid>, nospam
<nospam@nospam.invalid> writes
>In article <XeFjBYBtAs7JFA1b@phaedsys.demon.co.uk>, Chris H
><chris@phaedsys.org> wrote:
>
>> >Exactly. When I think "full frame" I think 6 x 7 cm.
>>
>> That was my point. It is relative. So the DX size sensor is "full frame"
>> for DSLR's and all this rubbish about going "full [35mm]frame" is just
>> marketing.
>
>then a compact p&s is full frame. and cellphone cameras are full
>frame. the word loses meaning.

Quite so.

--
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills Staffs England /\/\/\/\/
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

==============================================================================
TOPIC: Are todays LCD screen any good in bright weather
http://groups.google.com/group/rec.photo.digital/t/d70e4ce3863b627f?hl=en
==============================================================================

== 1 of 3 ==
Date: Wed, Apr 22 2009 9:45 am
From: "Ken"

I have an older Nikon 7900 with 2" screen and even in normal light sometimes
have to take a guess when outside that I have got the subject in frame. I
was thinking of getting a modern digi camera with 2.5 or bigger LCD screen
but only if I feel convinced they are better to use outside. Whats the point
in having to guess the shot???

Anyone with a modern camera with the LCD that will work in brighter
conditions?

Ken

== 2 of 3 ==
Date: Wed, Apr 22 2009 10:19 am
From: Jürgen Exner

"Ken" <none@none.co.uk> wrote:
>I have an older Nikon 7900 with 2" screen and even in normal light sometimes
>have to take a guess when outside that I have got the subject in frame. I
>was thinking of getting a modern digi camera with 2.5 or bigger LCD screen
>but only if I feel convinced they are better to use outside. Whats the point
>in having to guess the shot???

That's what a viewfinder is for. They are becoming a rare breed, but you
can still find them.

jue

== 3 of 3 ==
Date: Wed, Apr 22 2009 10:39 am
From: "Ken"

"Jürgen Exner" <jurgenex@hotmail.com> wrote in message
news:nakuu4h146rklkd5eu4odv82aorsc8v3kh@4ax.com...
> "Ken" <none@none.co.uk> wrote:
>>I have an older Nikon 7900 with 2" screen and even in normal light
>>sometimes
>>have to take a guess when outside that I have got the subject in frame. I
>>was thinking of getting a modern digi camera with 2.5 or bigger LCD screen
>>but only if I feel convinced they are better to use outside. Whats the
>>point
>>in having to guess the shot???
>
> That's what a viewfinder is for. They are becoming a rare breed, but you
> can still find them.
>
> jue

Sone of the Canons have them but not a wide angle lens I need. My Nikon 7900
has a viewfinder but with only a 75% of what you see is what you get. So I
end up using it and cropping in the software to get what I need for my idea
of the right composition.

Ken

==============================================================================
TOPIC: Why DSLR mirrors must eventually go
http://groups.google.com/group/rec.photo.digital/t/68febc4ea5622551?hl=en
==============================================================================

== 1 of 2 ==
Date: Wed, Apr 22 2009 9:49 am
From: jdear

On Apr 21, 9:29 pm, "David J. Littleboy" <davi...@gol.com> wrote:
> "Matt Clara" <n...@myexpense.com> wrote:
> > "David J. Littleboy" <davi...@gol.com> wrote:
>
> >>> Instead of MLU? Live View does not in and of itself reduce mirror
> >>> shock, does it? Or did you tear the mirror out of your DSLR so you
> >>> won't have to deal with it?
>
> >> You must be a Nikon user. When you take a shot in live view mode on a
> >> Canon camera, the mirror stays up and there is no mirror slap. Oops.
> >> Nikon gets something seriously wrong.
>
> > Is it possible to use Nikon's live vue in conjunction with MLU, or does
> > Nikon's live vue equal no possibility of MLU at all? If not, that would
> > be a serious flaw indeed.
>
> I don't know: that's something I read from a Nikon user here.
>
> Apparently the Nikons flop the mirror down to do an AF. Maybe if AF were
> turned off they'd do the right thing.
>
> --
> David J. Littleboy
> Tokyo, Japan

What about exposure? If the mirror doesn't come down, the exposure
will
have to be either set manually or the last EV taken used ( which may
now
be incorrect because the scene changed ). True?

== 2 of 2 ==
Date: Wed, Apr 22 2009 10:05 am
From: "mcdonaldREMOVE TO ACTUALLY REACH ME"@scs.uiuc.edu

jdear wrote:

>
> What about exposure? If the mirror doesn't come down, the exposure
> will
> have to be either set manually or the last EV taken used ( which may
> now
> be incorrect because the scene changed ). True?

No ... the camera was looking at the sensor output.
It can calculate exposure from that.

Doug McDonald

==============================================================================
TOPIC: New Portugese convertible !!!!
http://groups.google.com/group/rec.photo.digital/t/82d9d8b041ec3d8c?hl=en
==============================================================================

== 1 of 2 ==
Date: Wed, Apr 22 2009 11:02 am
From: Paul Giverin

In message <N6ednUn8YIsgyHPUnZ2dnUVZ8gidnZ2d@novis.pt>, Focus
<dont@mail.me> writes
>70 MPG
>http://caldasdarainha.olx.pt/magalhaes-movel-iid-16058871
>;-)
Do you really have to cross post this shite to all these groups?

--
Paul Giverin

British Jet Engine Website:- www.britjet.co.uk

My photos:- www.pbase.com/vendee

== 2 of 2 ==
Date: Wed, Apr 22 2009 11:28 am
From: Bruce

Paul Giverin <paul@giverin.co.uk> wrote:
>In message <N6ednUn8YIsgyHPUnZ2dnUVZ8gidnZ2d@novis.pt>, Focus
><dont@mail.me> writes
>>70 MPG
>>http://caldasdarainha.olx.pt/magalhaes-movel-iid-16058871
>>;-)
>Do you really have to cross post this shite to all these groups?

Does he ever post anything else?

==============================================================================

You received this message because you are subscribed to the Google Groups "rec.photo.digital"
group.

To post to this group, visit http://groups.google.com/group/rec.photo.digital?hl=en

To unsubscribe from this group, send email to rec.photo.digital+unsubscribe@googlegroups.com

To change the way you get mail from this group, visit:
http://groups.google.com/group/rec.photo.digital/subscribe?hl=en

To report abuse, send email explaining the problem to abuse@googlegroups.com

==============================================================================
Google Groups: http://groups.google.com/?hl=en

Photoshop How To Use

Categories

Blog Archive

About Me

Wednesday, April 22, 2009

rec.photo.digital - 25 new messages in 9 topics - digest

0 comments:

Live Traffic