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Dave
>The neccesary step to learn more about DSLR
is to type 'Free Tutorials' on your search machine.
John
<xTrai...@gmail.com> wrote:
>No more sky blown out, or shadows too dark.
It's called the Zone System. You should try it with a real camera.
JD
KatWoman
John
wrote:
>> It's called the Zone System. You should try it with a real camera.
>>
>> JD
>
>LOL
>
>OK ANSEL
Me and my 5X7 Linhof thank you very much however I'm closer to being
someone in the shadow of Ansel. Boy would he have had a ball my
Panasonic 10MP though !
JD
"To photograph truthfully and effectively is to see beneath the
surfaces and record the qualities of nature and humanity which live or
are latent in all things." - Ansel Adams (1902-1984)
granny
Could you explain please what this new 'Zone System' is with step by
step instructions... I want to see below surface like x-ray
Thank you in advance
--
jjs
news:47df648c$0$17362$4c36...@roadrunner.com...
> Could you explain please what this new 'Zone System' is with step by step
> instructions...
Sure, just as soon as you post step-by-step instructions for brain surgery
John
wrote:
>Could you explain please what this new 'Zone System' is with step by
>step instructions... I want to see below surface like x-ray
>
>Thank you in advance
You will find a good overview at the following links :
http://en.wikipedia.org/wiki/Zone_system
http://www.luminous-landscape.com/tutorials/zone_system.shtml
http://www.kenrockwell.com/tech/zone.htm
As to X-Ray vision, I don't have any experience in that field. Now
infrared is quite interesting.
http://www.dimagemaker.com/article.php?articleID=789
One might be able to use a Kodak Aero-Ektar with some HSI (if you can
find it) for interesting images.
JD
granny
APPARATUS AND METHODS FOR PERFORMING BRAIN SURGERY
A less invasive surgical technique for performing brain surgery in which
a dilating obturator and cannula assembly is inserted into brain tissue
until the obturator tip and cannula are adjacent the target tissue. The
obturator is removed and surgery is performed through the cannula. In
preferred embodiments the obturator and cannula are placed using image
guidance techniques and systems to coordinate placement with
pre-operative surgical planning. A stylet with associated image guidance
may be inserted prior to insertion of the obturator and cannula assembly
to guide insertion of the obturator and cannula assembly. Surgery
preferable is performed using an endoscope partially inserted into the
cannula with an image of the target tissue projected onto a monitor.
The brain is a delicate soft tissue structure that controls bodily
functions through a complex neural network connected to the rest of the
body through the spinal cord. The brain and spinal cord are contained
within and protected by significant bony structures, e.g., the skull and
the spine. Given the difficulty of accessing the brain through the hard
bony protective skull the diagnosis and treatment of brain disorders
presents unique challenges not encountered elsewhere in the body.
Diagnosis of brain disorders requires clear, accurate imaging of brain
tissue through the skull. In recent years significant advances have been
made in imaging technology, including stereotactic X-ray imaging,
Computerized Axial Tomography (CAT), Position Emission Tomography (PET)
and Magnetic Resonance Imaging (MRI). See, for example, Butler U.S.
Patent 6,359,959. These imaging devices and techniques permit the
surgeon to examine conditions within the brain in a non-invasive manner
without opening the skull. If a target lesion or mass is identified
through use of one or more imaging techniques, it may be necessary or
desirable to biopsy a lesion within the brain.
Once a diagnosis has been reached based upon one or more imaging
techniques, a treatment plan must be developed. One available method of
treatment involves X-ray therapy
Alternatively, surgical treatment may be necessary or desired. In order
to operate surgically on the brain, access must be obtained through the
skull and delicate brain tissue containing blood vessels and nerves that
can be adversely affected by slight disturbances. Therefore, great care
must be taken in operating on the brain not to disturb delicate blood
vessels and nerves so that adverse consequences do not resxilt during or
after surgery. Brain surgery can be highly invasive. In some instances,
in order to obtain access to target tissue, a substantial portion of the
skull is removed and entire sections of the brain are retracted to
obtain access. Of course, such techniques are not appropriate for all
situations, and not all patients are able to tolerate and recover from
such invasive techniques. It is also known to access certain portions of
the brain by forming a hole in the skull, but only limited surgical
techniques may be performed through such smaller openings. In addition,
some techniques have been developed to enter through the nasal passages,
opening an access hole through the occipital bone to remove tumors
located, for example, in the area of the pituitary.
A significant advance in brain surgery is stereotactic surgery involving
a stereotactic frame correlated to stereotactic X-ray images to guide a
probe or other smrgical instrument through an opening formed in the
skull through brain tissue to a target lesion or other body.
A related advance is frameless image guidance, in which an image of the
surgical instrument is superimposed on a pre-operative image to
demonstrate the location of the instrument to the surgeon and trajectory
of further movement of the probe or instrument.
A preferred apparatus for accessing brain tissue has a dilating
obturator with a blunt distal tip, a substantially cylindrical shaft
portion, and a proximal handle portion. A cannula is disposed around the
shaft portion and preferably is made of a transparent material. The
obturator and cannula assembly preferably is associated with an
image-guided surgery system so that placement of the obturator and
cannula assembly can be carefully monitored and controlled as the
obturator and cannula assembly is atraumatically inserted into brain
tissue.
In a first embodiment the obturator has a longitudinal channel
therethrough configured and dimensioned to receive the shaft of a narrow
stylet or probe. The stylet or probe has attached thereto image guidance
means calibrated to indicate the orientation and position of the stylet
or probe. An image guidance system interacts with the stylet or probe to
display for the surgeon on a monitor an image of the stylet or probe
superimposed onto an image of the patient s brain, such as an MRI image.
The image may be a pre-operative MRI image used for surgical planning.
When the stylet or probe is mounted in the longitudinal channel of the
obturator, the superimposed image of the probe also is indicative of the
position and orientation of the dilating obturator and the cannula.
Traditional methods are used to incise and retract soft tissue of the
scalp covering the skull. A hole is made in the skull, and the dura is
opened and retracted to provide access to the brain. In the first
method, the stylet or probe is inserted through the obturator
longitudinal channel and advanced until a length of the stylet or probe
extends out of and beyond the blunt tip of the dilating obturator. The
dilating obturator and cannula assembly is held back away from the
tissue as the stylet or probe is gently advanced through the brain
tissue under both direct vision and positional image guidance until the
tip of the stylet or probe is adjacent the target tissue. Once the
stylet or probe is placed and the position is confirmed using the image
guidance system, the blunt dilating obturator and cannula assembly is
slowly and carefully advanced into the brain tissue to atraumatically
spread the tissue over the dilating tip and around the cannula while
maintaining the position of the stylet or probe as a guide to
advancement of the obturator and cannula assembly. A gentle back and
forth rotation during insertion may facilitate placement of the
obturator cannula assembly. Preferably, the cannula is clear so that the
dilated brain tissue may be visually inspected through the walls of the
cannula to assure that no damage was caused to surrounding brain tissue
during insertion of the device.
Alternatively, in a second contemplated method the image guidance means
may be mounted directly to the dilating obturator and cannula assembly
so that the obturator and cannula assembly may be inserted without a
separate stylet or probe. In this configuration, the obturator and
cannula assembly is inserted into the brain tissue under image guidance
until the obturator is adjacent the target tissue. Once the obturator
and cannula assembly is positioned, the dilating obturator is removed,
leaving the cannula in place.
In yet a third contemplated method, the dilating obturator and cannula
assembly may be inserted into the brain under direct visualization
without use of an image guidance system.
After the cannula is placed, surgery may be performed through the
cannula, either under direct vision or more preferably using an
endoscope and camera system to project an enlarged image of the target
tissue onto a monitor to visualize the tissue during surgery.
Preferably, the cannula has a diameter of approximately 10 mm to 20 mm,
and more preferably 10 mm to 15 mm. An endoscope of a substantially
smaller diameter, such as a 4 mm endoscope, is mounted partially
inserted into the cannula. The endoscope is mounted to one side of the
cannula and inserted so that the image projected onto the monitor is of
the target tissue at the end of the cannula. In practice, a 4 mm
endoscope inserted approximately halfway into the cannula is appropriate
to create the desired image display while leaving a substantial portion
of the cannula open and available for the insertion of instruments to
perform surgery. Optionally, a camera holder may be used to secure the
endoscope in the desired position.
Appropriate surgical instruments are then used to perform surgery upon
the target tissue. For example, scissors, graspers and suction tools may
be inserted through the cannula, visualizing the tips of the instruments
to perform the desired procedure either directly with the naked eye or
through a microscope, or indirectly through the endoscope using the
endoscope eyepiece or more preferably and camera system to display the
image on a monitor. A preferred instrument for debulking brain tissue is
a fluidized ultrasonic instrument, such as CUSA
During surgery, monitoring equipment may be used to monitor brain
function during surgery to assist the surgeon in understanding the
effects of the actions taken during surgery operating on the brain so
that the surgery may be terminated in the event an indication of an
adverse effect is detected.
After surgery upon, the target tissue is complete, the cannula is gently
removed, and the dura, skull and scalp are closed in a traditional
fashion.
Gentle atraumatic dilation of the brain tissue makes it possible to
operate further inside the brain than otherwise would be possible
utilizing traditional surgical techniques. The disclosed methods and
apparatus create an access area to work while simultaneously protecting
adjacent brain tissue from, inadvertent collateral damage and trauma
that might otherwise occur if more traditional surgical techniques were
to be utilized. In addition, accessing target tissue through the cannula
as contemplated avoids more invasive techniques that involve removing
substantial portions of the skull and retracting large portions of the
brain to gain access to operate on target tissues. In some cases, the
devices and methods may make it possible to operate on target tissue
that would, without these devices and methods, otherwise be regarded as
inoperable using previously known techniques.
The techniques described herein are particularly useful to access
tumors, cysts or other conditions which might otherwise be considered
inoperable or might require much more invasive transcranial surgery to
remove a larger portion of the skull and retract a substantial amount of
brain tissue. The techniques described herein using dilating obturator
and cannula permit brain surgery to be performed in a less invasive
manner through an opening in the skull that is substantially smaller
then otherwise possible, on the order of a 2 cm to 4 cm in diameter
rather than a much larger opening for more traditional surgical
techniques.
TAG - U - R- IT - ! Your Turn!!
John
wrote:
><jjs> wrote in message news:13tvd7f...@news.supernews.com...
>> "granny" <DontS...@NoSpam.com> wrote in message
>> news:47df648c$0$17362$4c36...@roadrunner.com...
>>
>>> Could you explain please what this new 'Zone System' is with step by
>>> step instructions...
>>
>> Sure, just as soon as you post step-by-step instructions for brain
>> surgery
>
>
>APPARATUS AND METHODS FOR PERFORMING BRAIN SURGERY
Well now ! You just never know what's going to popup on the USENET !
JD
granny
John, You are good people!
The links are very informative and relevant to an idiotic
question/request and an ill attempt at humor referencing your quote "to
see beneath the
surfaces and record the qualities of nature and humanity which live or
are latent in all things." by Ansel Adams.. Very few people now days
have the time for "f/64" and rely on in camera "zone" lightmeters with
shutters that only click when you show teeth
BTW.. I have used that huge lens mounted on my 4x5 but with regular
film. (Dang, that was a few days ago! In the 50s) and I don't think the
mount would fit the Phonecam I have now..
Instead of all that.. I will settle for the Sony nightshot.. heck it can
even see through clothes given the right conditions.. and all digitals
can see IR (just need to remove the filter for optimum use)
Anyway.. Thanks for keeping the NG honest and appropriate (Tis rare in
this day and age!)
I will keep it more relevant next time..
--
"Granny"
Old N Slow N Prefer Quick N Easy
granny
I'm just an Old Granny BUT, I stayed at a Holiday Inn Express last
night!
KatWoman
"granny" <DontS...@NoSpam.com> wrote in message
granny ZONE SYSTEM is ancient history in photography
just the shortest version here: Ansel recommended a lot of different zones
each with varying exposures
to bring out maximum tonality in specific areas of BW images
he was also famous for making endless prints before being satisfied
while I would never criticize his work for most of us it is a very tedious
method of capture
and really applies to artsy fartsy landscape images he produced
My husband apprenticed under a guy who was his contemporary and he had
endless funny things to say about ANSEL
among my favorites was he was a rich guy who had too much time on his hands
another famous photog AVEDON: once I saw his notes for dodge-burning a print
what a hoot
5% corrections in a cheek for example and about twenty more circled areas
where he wanted dodge or burn in small amounts for one face in a portrait
I think Avedon's printer would've loved Photoshop where that kind of
specificity is a whole lot easier than trying to cram in all that dodge burn
under a safelight in under 30 seconds
most of us have to produce commercially and more quickly and haven't the
time to sit in the desert for days waiting for that perfect moment
and the necessity of getting on the "negative" is less important than it
used to be with film and before retouching and digital
OK I know all you artsy fartsy purists gonna blast this post as Ansel is
considered some god of photography and I have uttered blasphemes of the ZONE
SYSTEM here
don't bother
jjs
"granny" <DontS...@NoSpam.com> wrote in message
news:47dfd4c9$0$22795$4c36...@roadrunner.com...
> BTW.. I have used that huge lens mounted on my 4x5
[said in the voice of Crocodile Dundee] Ar, that ain't a huge lens. This is
a huge lens: http://www.digoliardi.net/super_biogon_2.jpg
(it is not the 75mm Biogon)
jjs
"KatWoman" <spam...@hotmail.com> wrote in message
news:IXUDj.20848$Er2....@bignews6.bellsouth.net...
> granny ZONE SYSTEM is ancient history in photography
I'm sure that is obvious, but does being old diminish its value?
> just the shortest version here: Ansel recommended a lot of different zones
> each with varying exposures
> to bring out maximum tonality in specific areas of BW images
Exposure, filtration and development. Don't forget development
> he was also famous for making endless prints before being satisfied
You point being?
> while I would never criticize his work for most of us it is a very tedious
> method of capture
> and really applies to artsy fartsy landscape images he produced
Oh, that's gonna leave a mark.
> another famous photog AVEDON: once I saw his notes for dodge-burning a
> print
> what a hoot
> 5% corrections in a cheek for example and about twenty more circled areas
> where he wanted dodge or burn in small amounts for one face in a portrait
What is wrong with desiring perfection?
> I think Avedon's printer would've loved Photoshop where that kind of
> specificity is a whole lot easier than trying to cram in all that dodge
> burn under a safelight in under 30 seconds
There was a long line of excellent printers who would have loved to do the
wet darkroom work for Avedon.
> most of us have to produce commercially and more quickly and haven't the
> time to sit in the desert for days waiting for that perfect moment
> and the necessity of getting on the "negative" is less important than it
> used to be with film and before retouching and digital
So you are proud to be a hack. That explains everything.
granny
hope it is Rectilinear"
jjs
"granny" <DontS...@NoSpam.com> wrote in message
> <jjs> wrote in message news:13u0or1...@news.supernews.com...
>> [said in the voice of Crocodile Dundee] Ar, that ain't a huge lens. This
>> is a huge lens: http://www.digoliardi.net/super_biogon_2.jpg
>> (it is not the 75mm Biogon)
>>
> She Swooons... OOOH ! and squeales in delight.. "It's sooo BIG !! I hope
> it is Rectilinear"
It certainly is. Right straight up there.
granny
Promises, Cubed... I don't believe anything you say anymore.. You said
you would provide me a step by step if I gave you something...
For someone of your apparent expertise, I ask a relative simple
question, to wit:
~~~~~~~
"Could you explain please what this new 'Zone System' is with step by
step
instructions..."
~~~~~~~~~
You even Quoted the request so your answer would not be mis-interpreted
and stated, "Sure, just as soon as you post step-by-step instructions
for brain surgery"
~~~~~~~~~
I did... You didn't!! Liar,Liar!
Besides that Big Ol thing you showed me probably isn't capable of being
Rectilinear any more and as old as it looks probably is moldy and
doesn't shoot right because of inactivity.. That little aperture might
even be rusted shut..
I feel sooo let down and just plain USED!! AGAIN!! I am very
disappointed in you!
No need to reply now, Others on this Ng have NOT skirted the issue as
you did and have been very helpful indeed.
Besides I think we have carried this BS far enough and sufficiently
hijacked this thread..and I wouldn't want you to get to excited with all
this double entendre..
FWIW.. I have spent many hours under a blackout cloth in the early
morning and late evening sun looking at an upside down image on a piece
of glass trying to make things look good.. Then do it all over again in
the darkroom.. Been there done that and forgot most of it!
Ain't Photoshop GREAT!!
Laters,
Granny
granny
>
Kat is one of my favorites on here and is a SWEET hack who needs no
explanation or justification!
--
"Granny"
Dave
wrote:
>
>Promises, Cubed... I don't believe anything you say anymore.. You said
>you would provide me a step by step if I gave you something...
>
>For someone of your apparent expertise, I ask a relative simple
>question, to wit:
>~~~~~~~
>"Could you explain please what this new 'Zone System' is with step by
>step
> instructions..."
>~~~~~~~~~
>You even Quoted the request so your answer would not be mis-interpreted
>and stated, "Sure, just as soon as you post step-by-step instructions
>for brain surgery"
>~~~~~~~~~
> I did... You didn't!! Liar,Liar!
>
>
>Laters,
>Granny
>
He proved himself a liar. You even went as far as studying overnight
in order to bring your side of the agreement. At least, you scored a
doctors degree - he lost the respect of the crew.
Dave
granny
"Dave" <d...@d.durbs> wrote in message
news:02u1u3p3e4rcgc1p3...@4ax.com...
The sweet essence of vindication, Thank you Dave!
"Granny"
Pudentame
KatWoman
<jjs> wrote in message news:13u0pfh...@news.supernews.com...
>
1. I am not a photographer, I fix photos
where is your work oh great and talented one?
do you use the zone system daily?
What is wrong with desiring perfection?
I said his technique is NOT for everyone ("while I would never criticize his
work" is what I did say, next time read what it says., not what you would
like it to say )
2. unlike yourself at least I can comprehend what I read
(what part of "don't bother" you do not understand?)
yes I have blasphemed the god of photography
and I said it UP FRONT
"purists gonna blast this post as Ansel is
considered some god of photography and I have uttered blasphemes of the ZONE
SYSTEM here"
told ya so folks
always more horse's asses than horses
I see why most of the really good people quit posting here
KatWoman
<jjs> wrote in message news:13u0pfh...@news.supernews.com...
>
again YOU are unable to read?
granny had not heard of it so, my comment refers to that
the value judgment I never implied is your fantasy of what I said
DO NOT PUT YOUR WORDS INTO MY MOUTH THEY TASTE AND SMELL BAD
Pudentame
>
>
> OK I know all you artsy fartsy purists gonna blast this post as Ansel is
> considered some god of photography and I have uttered blasphemes of the ZONE
> SYSTEM here
> don't bother
>
I don't know if this is considered a BLAST, but I like his work. I don't
consider it artsy fartsy, and I'm no purist.
The Zone System is/was essentially his method of getting the best out of
the materials available at the time. If Adams were shooting today, he'd
use digital in addition to his medium format and large format work;
probably be scanning those 8x10 negatives.
And he'd be using Photoshop to accomplish the same things he
accomplished by exposure, development and dodging & burning his prints
back in the wet darkroom days.
Say what you will about Ansel, even after he's been dead for 24 years,
he's still still selling more prints than either one of us. His work
seems to have stood up to the test of time. At least so far.
jjs
>
> <jjs> wrote in message news:13u0pfh...@news.supernews.com...
> 1. I am not a photographer, I fix photos
Oh. Never needed one.
> where is your work oh great and talented one?
Surf and ye shall find. I use a pseudonym.
> do you use the zone system daily?
Modified ZS. The Zonnies system is way overboard. Made for a lot of
scholarship. Not a significant improvement to the simplified version.
> 2. unlike yourself at least I can comprehend what I read
> (what part of "don't bother" you do not understand?)
What part of Usenet do you not understand?
> always more horse's asses than horses
> I see why most of the really good people quit posting here
Another hackneyed Usnet quip. Try better.
jjs
> DO NOT PUT YOUR WORDS INTO MY MOUTH THEY TASTE AND SMELL BAD
No. Your mouth was like that before.