hi,
i have a canon 28-105 mm lens and would like to know what the markings
are on the focus ring and how to use them. im sure there is a web site
that explains it,,does anyone know?
> i have a canon 28-105 mm lens and would like to know what the markings
> are on the focus ring and how to use them. im sure there is a web site
> that explains it,,does anyone know?
They're merely the focal length of the zoom. ie 28, 35,
50, 70 and 105mm.
>wendy wrote
>
>> i have a canon 28-105 mm lens and would like to know what the markings
>> are on the focus ring and how to use them. im sure there is a web site
>> that explains it,,does anyone know?
>
>They're merely the focal length of the zoom. ie 28, 35,
>50, 70 and 105mm.
Erm... they would be on the zoom ring, not the focus ring. I
assume the markings on the focus ring are distances.
>John Bean wrote
>
>> Erm... they would be on the zoom ring, not the focus ring. I
>> assume the markings on the focus ring are distances.
>
>There's nothing on the focus ring. That's the trick.
Ah, right... in that case I retract my comment ;-)
You will have realised from my use of the word "assume" that
I don't have the lens, but if someone asks about the
markings on the focus ring I thought it reasonable to think
it had markings of some sort. Silly me :-)
> Ah, right... in that case I retract my comment ;-)
No worries, John. My answer was misleading
anyway. You're observation was quite correct
although I suspect the OP might not have understood
that there's a difference between the soom ring and the
focus ring ;-)
> John Bean wrote
>
>> Erm... they would be on the zoom ring, not the focus ring. I
>> assume the markings on the focus ring are distances.
>
> There's nothing on the focus ring. That's the trick.
There's nothing ON the focus ring on the EF 28-105 lens.
But when you twist the focus ring, there are numbers under
a little plastic window that move with the ring. This window
is on top of the lens just behind the focus ring.
There are two rows of numbers. One row is green. These show
the focus distance in feet. The other row is white. These
show the focus distance in meters. When your subject is in
focus, you can determine the distance to your subject by reading
the number that is next to a white line that is etched on the
lens body.
These numbers are used for special circumstances, (like focusing
for the hyperfocal distance). Below is a link that describes
this process:
> But when you twist the focus ring, there are numbers under
> a little plastic window that move with the ring. This window
> is on top of the lens just behind the focus ring.
I sit down corrected. I must have a different version. Sounds
like a carry over from the old FD lenses.
On Wed, 11 Jul 2007 11:06:38 -0500, Jim Townsend <not@real.address>
wrote:
>Chris Gilbert wrote:
>
>> John Bean wrote
>>
>>> Erm... they would be on the zoom ring, not the focus ring. I
>>> assume the markings on the focus ring are distances.
>>
>> There's nothing on the focus ring. That's the trick.
>
>There's nothing ON the focus ring on the EF 28-105 lens.
>
>But when you twist the focus ring, there are numbers under
>a little plastic window that move with the ring. This window
>is on top of the lens just behind the focus ring.
>
>There are two rows of numbers. One row is green. These show
>the focus distance in feet. The other row is white. These
>show the focus distance in meters. When your subject is in
>focus, you can determine the distance to your subject by reading
>the number that is next to a white line that is etched on the
>lens body.
>
>These numbers are used for special circumstances, (like focusing
>for the hyperfocal distance). Below is a link that describes
>this process:
>
>http://www.cjcom.net/articles/hyperfoc.htm
>
thank you,,I'll try to be more precise in the future,,
>Jim Townsend
>
>> But when you twist the focus ring, there are numbers under
>> a little plastic window that move with the ring. This window
>> is on top of the lens just behind the focus ring.
>
>I sit down corrected. I must have a different version. Sounds
>like a carry over from the old FD lenses.
There you go, I assumed right about the non-existent
markings being distance :-)
focus ring 
Linear Mode
