At one time I had a Kodak camera that used 126 film that had two
focusing positions 3.5-12 feet, and 12-infinity.
I'm sure that I've seen 35mm cameras made during the 40's and 50's that
used a similar method for focusing. I know there
were a number of 110 cameras that used that system.
Doug Fra
"Cheating" this way can just as easily be done with scanned negatives.
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Oprindelig meddelelse-
Fra: Mark Roberts [mailto:[EMAIL PROTECTED]
Sendt: 13. april 2004 18:25
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus
[EMAIL PROTECTED] wrote:
>In a message dated 4/13/2004 6:05:41 AM Pacific Standard Time,
>[EMAIL PROTECTED] writes:
>Just to point out, Marnie, it's fairly easy (with a DSLR) to "cheat" and
>get extended DoF. Using a tripod, take a picture with focus at infinity
>and then another with the closer
In a message dated 4/13/2004 6:05:41 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Just to point out, Marnie, it's fairly easy (with a DSLR) to "cheat" and
get extended DoF. Using a tripod, take a picture with focus at infinity
and then another with the closer object in focus. These can th
He, he, he...
You know where that 6, 10, 15 feet thing started? Press Cameras. It gives you
f32, f22, and f16 with a #5 flashbulb on ASA 100 film. I use those settings all
the time with my Graphic, and yes they give just enough DOF to cover the usable
exposure.
Still a useful technique in thi
- Original Message -
From: "Keith Whaley"
Subject: Re: Zone Focus - what is it?
> You're right, of course. It was just a silly comment.
I found a very deep philosophical meaning to it.
William Robb
You're right, of course. It was just a silly comment.
keith
Anders Hultman wrote:
Keith Whaley:
In the strictest sense, "Halfway between 10.6 meters and infinity" is
a statement without meaning.
If you take it to mean "halfway between the 10.6 meter mark and the
infinity mark on the lens bar
Emne: Re: Zone Focus - what is it?
Jens Bladt wrote:
That's right, Kieth. But, as I mentioned - my Eastern German lenses for
Pentacon Six does not have a DOF scale. Other than that they are brilliant
lenses from pre war Carl Zeiss.
[...]
5
Til: [EMAIL PROTECTED]
Emne: SV: Zone Focus - what is it?
Very clever and usefull DOF chart!
Thanks, Paul
Jens
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Oprindelig meddelelse-
Fra: Paul Sorenson [mailto:[EMAIL PROTECTED]
Sendt: 10. april 2004 23:28
Til: [EMAIL PROT
Keith Whaley:
In the strictest sense, "Halfway between 10.6 meters and infinity" is
a statement without meaning.
If you take it to mean "halfway between the 10.6 meter mark and the
infinity mark on the lens barrel" then you don't have to worry about
infinity not being an existing point in space.
Jens Bladt wrote:
Kieth (and others).
I know that HFD is (by definition) the distance to the closest sharp point,
when the lens is "focused" to infinity (meaning NOT focused).
I practice this distance (HFD) is the distance you can focus at, when you
still want "infinity" to be sharp - that is ma
In a message dated 4/10/2004 2:28:44 PM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Here is a link for a couple depth of field calculators - including a
program, DOFMaster, which will let you choose format and focal length to
print a circular slide rule device that you can carry with you to d
In a message dated 4/10/2004 5:43:42 PM Pacific Standard Time,
[EMAIL PROTECTED] writes:
And if you start quoting mathmatical formulae, I am certain to
projective vomit over the north pole and into your back yard.
William Robb
You got to stop drinking coffee or something, W
- Original Message -
From: "Jens Bladt"
Subject: RE: Zone Focus - what is it?
> >Hyper focal distance nothing to do with zone focusing.
>
> Oh, it does. The HFD is the basic math behind defining the zones in
order to
> ensure overlapping DOF "between&qu
t.com/
Paul
- Original Message -
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, April 10, 2004 3:04 PM
Subject: Re: Zone Focus - what is it?
> In a message dated 4/10/2004 11:36:29 AM Pacific Standard Time,
> [EMAIL PROTECTED] writes:
> If anybody is
Sendt: 10. april 2004 22:04
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
In a message dated 4/10/2004 11:36:29 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
If anybody is interested, I have made a spreadsheet (Excel) on HFD and NL
for common 6x6 and 35mm focal lengths.
All the
Emne: Re: Zone Focus - what is it?
I do not have a 70mm lens to check against. However, I just checked my
M50/1.7
at f22 my formula gives 2.2 meters, however the DOF scale give 1.5 times
that or
3.3 meters. That would be using a 1500 multiplier which is being
conservative,
but matchs your .021 CoC fig
In a message dated 4/10/2004 11:36:29 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
If anybody is interested, I have made a spreadsheet (Excel) on HFD and NL
for common 6x6 and 35mm focal lengths.
All the best
Jens
--
Yeah, I'd like to see it. And I know exactly what you are talk
The red tick is the infrared focus offset for the lens. With infrared film you
focus the lens. Note the distance. Then move that distance to the red tick.
The red f-stop and red distance sets hyperfocal on the WA lenses.
--
Andre Langevin wrote:
I didn't understand the thing with the red tic m
Yes, you are right. Hyperfocal distance is by definition the focus distance
where the far DOF limit is infinity. DOF can be calculated without referring to
it, but using it makes the formulas simpler.
--
Keith Whaley wrote:
Correct a possible misconception for me, please?
I've always thought
I do not have a 70mm lens to check against. However, I just checked my M50/1.7
at f22 my formula gives 2.2 meters, however the DOF scale give 1.5 times that or
3.3 meters. That would be using a 1500 multiplier which is being conservative,
but matchs your .021 CoC figure.
Where the 1000 comes fr
I didn't understand the thing with the red tic mark on the lens,
explained by Dough??
Jens Bladt
On their WA lenses (since the Super-Takumar lenses), Pentax have a
number on the distance scale that is red, as is also the "8" on the
aperture ring. If you align the two red numbers, you are set at
Oh, it does. The HFD is the basic math behind defining the zones in order to
ensure overlapping DOF "between" them.
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Oprindelig meddelelse-
Fra: William Robb [mailto:[EMAIL PROTECTED]
Sendt: 10. april 2004 14:50
T
MAIL PROTECTED]
Sendt: 9. april 2004 20:27
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
- Original Message -
From:
Subject: Re: Zone Focus - what is it?
I wish you could put that in inches and feet then I *might* get it.
It's one
of the things I never quite *got* in
Emne: RE: Zone Focus - what is it?
>Hyper focal distance nothing to do with zone focusing.
Oh, it does. The HFD is the basic math behind defining the zones in order to
ensure overlapping DOF "between" them.
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Opr
Robb [mailto:[EMAIL PROTECTED]
Sendt: 10. april 2004 14:50
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
- Original Message -
From: "Boris Liberman"
Subject: Re: Zone Focus - what is it?
> Hi!
>
> Thanks!
>
> Jens, I think I knew about the hyper f
I find that to be true myself.
BTW the hyperfocal distance is fixed for a given f-stop on a given focal length.
You can easily memorize it for your most used combinations. Say, f8, and f16 at
24mm, 35mm, and 50mm (that is only 6 to remember) which should do for most
landscape work. Just manuall
.
All the best
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Oprindelig meddelelse-
Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sendt: 9. april 2004 21:56
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
In a message dated 4/9/2004 12:44:46 PM Pa
...Well 29 meters are sertainly much less than 1/3 of distance to infinity,
isn't it ? :-)
Jens Bladt
To figure out that distance, one needs:
A: A powerfull CPU...
B: A call to the NASA...
C: A little taoist thinking...
Andre
- Original Message -
From: "Boris Liberman"
Subject: Re: Zone Focus - what is it?
> Hi!
>
> Thanks!
>
> Jens, I think I knew about the hyper focal distance and Pentax
manual
> lens markings... I just did not know it was called also the zone
> focus. Tha
PROTECTED]
Emne: SV: Zone Focus - what is it?
...Well 29 meters are sertainly much less than 1/3 of distance to infinity,
isn't it ? :-)
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Oprindelig meddelelse-
Fra: William Robb [mailto:[EMAIL PROTECTED]
Sendt: 9.
: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
A much simpler formula is: H = 1000 * D, where
H is Hyperfocal-distance, and
D is diameter-of-the-aperture.
(1000 * D assumes an 8x10, or 8x12 print regardless of the format.)
You can determine D from: D = f / N, where
f is focal-length, and
N is f
ECTED]
Emne: Re: Zone Focus - what is it?
In a message dated 4/9/2004 4:37:32 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Hyperfocal distance (H) is a way to dertemine the distance to focus the lens
for a given aperture and focal length to ensure maksimum DOF, when you want
sharpness to inf
e: Re: Zone Focus - what is it?
- Original Message -
From:
Subject: Re: Zone Focus - what is it?
> I wish you could put that in inches and feet then I *might* get it.
It's one
> of the things I never quite *got* in the photography classes I
took. (And not
> getting still shows
Ah, "The Negative" goes into great detail on Zone EXPOSURE, not zone
focusing.
Bill
- Original Message -
From: "Boris Liberman" <[EMAIL PROTECTED]>
To: "Boris Liberman" <[EMAIL PROTECTED]>
Sent: Saturday, April 10, 2004 3:02 AM
Subject: Re: Z
Hi!
Thanks!
Jens, I think I knew about the hyper focal distance and Pentax manual
lens markings... I just did not know it was called also the zone
focus. Thanks for the formulas. I need to memorize them may be...
Well, I've got now "The Negative" and I am going to read it very
thoroughly...
I s
In a message dated 4/9/2004 12:44:46 PM Pacific Standard Time,
[EMAIL PROTECTED] writes:
An even simpler formula is use the DOF preview on the camera and look
through the viewfinder. When in doubt, stop down a stop or two. My desire is
to make pictures, not get involved with mathematics.
Bill
---
In a message dated 4/9/2004 12:40:43 PM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Heck, thats one thing I would like to have automated. The only
calculation I do in the field is for lens extension, and that I do
mostly by guesswork (very educated guesswork, but guesswork none the
less).
My
- Original Message -
From: "Bill Owens" <[EMAIL PROTECTED]>
>
> My desire is
> to make pictures, not get involved with mathematics.
>
> Bill
You're on the wrong list! ;-)
Christian
lt;[EMAIL PROTECTED]>
Sent: Friday, April 09, 2004 2:50 PM
Subject: Re: Zone Focus - what is it?
> A much simpler formula is: H = 1000 * D, where
> H is Hyperfocal-distance, and
> D is diameter-of-the-aperture.
> (1000 * D assumes an 8x10, or 8x12 print regardless of the format.)
&
- Original Message -
From: <[EMAIL PROTECTED]>
Subject: Re: Zone Focus - what is it?
> Didn't you buy a Canon SLR?
> Do they still have the depth of field program mode built in?
>
> --
> Sure. But, you know, I want to understand it my
Even relatively sophisticated snapshot cameras sometime were designed that way.
I used to have a Minox 35EL, and a Canon Demi EE-1.7 that had such markings on them.
--
Keith Whaley wrote:
I have an older camera (that I can't seem to put my hands on right
now...) that has symbols in lieu of the
pril 2004 06:33
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
On Fri, 9 Apr 2004 07:25:27 +0200, Boris Liberman wrote:
Please enlighten the ignorant, as usual...
Using the hyperfocal distance of the lens, possibly modified, to make
sure that everything you're likely to shoot is in
In a message dated 4/9/2004 11:26:26 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Didn't you buy a Canon SLR?
Do they still have the depth of field program mode built in?
William Robb
--
Sure. But, you know, I want to understand it myself (and not just let the
camera do it
- Original Message -
From:
Subject: Re: Zone Focus - what is it?
> I wish you could put that in inches and feet then I *might* get it.
It's one
> of the things I never quite *got* in the photography classes I
took. (And not
> getting still shows up sometimes in my l
In a message dated 4/9/2004 4:37:32 AM Pacific Standard Time,
[EMAIL PROTECTED] writes:
Hyperfocal distance (H) is a way to dertemine the distance to focus the lens
for a given aperture and focal length to ensure maksimum DOF, when you want
sharpness to infinity (e.i. landscape photograph):
H = F
: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
On Fri, 9 Apr 2004 07:25:27 +0200, Boris Liberman wrote:
Please enlighten the ignorant, as usual...
[...]
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-Oprindelig meddelelse-
Fra: Doug Franklin [mailto:[EMAIL PROTECTED]
Sendt: 9. april 2004 06:33
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
On Fri, 9 Apr 2004 07:25:27 +0200, Boris Liberman wrote:
> Please enlig
MAIL PROTECTED]
Sendt: 9. april 2004 06:33
Til: [EMAIL PROTECTED]
Emne: Re: Zone Focus - what is it?
On Fri, 9 Apr 2004 07:25:27 +0200, Boris Liberman wrote:
> Please enlighten the ignorant, as usual...
Using the hyperfocal distance of the lens, possibly modified, to make
sure that everything
On Fri, 9 Apr 2004 07:25:27 +0200, Boris Liberman wrote:
> Please enlighten the ignorant, as usual...
Using the hyperfocal distance of the lens, possibly modified, to make
sure that everything you're likely to shoot is in focus. For example,
take your lens and figure out what f-stop you want to
Hi!
Please enlighten the ignorant, as usual...
Thanks?
Boris-the-Confused
51 matches
Mail list logo
