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External
Since: Oct 31, 2007
Posts: 39
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(Msg. 1) Posted: Fri Nov 30, 2007 10:17 pm
Post subject: Focusing question
Archived from groups: rec>photo>equipment>medium-format (more info?)
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I am new to medium format photography. I've just gotten a Yashica D TLR.
Using the focusing screen with the magnifier is taking some adaptation.
First of all, I am 50 years old and wear bifocals. When I look into the
magnifier to focus, the line between my bifocal and the normal part of my
glasses lens hits just about the center of the magnifier. If I lower my
head slightly, I am then looking through the top part of my glasses, and
focusing becomes much easier. I guess my question, bottom line, is should I
be looking through my bifocal at the magnifier, or should I be looking
through the upper part of my glasses lens? On my first roll I've opted for
the upper part of my glasses. I guess I'll know definitively in a week or
so when the first roll comes back from the lab. (I have to mail out my
film. No one locally does 120 format.)
Incidentally, I can barely find the camera without my glasses. |
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External
Since: Nov 24, 2007
Posts: 11
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(Msg. 2) Posted: Sat Dec 01, 2007 10:48 am
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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rwalker wrote:
> I am new to medium format photography. I've just gotten a Yashica
> D TLR. Using the focusing screen with the magnifier is taking some
> adaptation. First of all, I am 50 years old and wear bifocals.
> When I look into the magnifier to focus, the line between my
> bifocal and the normal part of my glasses lens hits just about the
> center of the magnifier. If I lower my head slightly, I am then
> looking through the top part of my glasses, and focusing becomes
> much easier. I guess my question, bottom line, is should I be
> looking through my bifocal at the magnifier, or should I be looking
> through the upper part of my glasses lens?
Let me make a wild - almost incredible - statement and say you should
look through the part that allows you to see best.
--
dadiOH
____________________________
dadiOH's dandies v3.06...
....a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico |
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External
Since: Oct 17, 2007
Posts: 490
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(Msg. 3) Posted: Sat Dec 01, 2007 12:19 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <4750d23c$0$24279$4c368faf@roadrunner.com>, rwalker
<rwalker.TakeThisOut@despammed.com> wrote:
> I am new to medium format photography. I've just gotten a Yashica D TLR.
> Using the focusing screen with the magnifier is taking some adaptation.
> First of all, I am 50 years old and wear bifocals. When I look into the
> magnifier to focus, the line between my bifocal and the normal part of my
> glasses lens hits just about the center of the magnifier. If I lower my
> head slightly, I am then looking through the top part of my glasses, and
> focusing becomes much easier. I guess my question, bottom line, is should I
> be looking through my bifocal at the magnifier, or should I be looking
> through the upper part of my glasses lens? On my first roll I've opted for
> the upper part of my glasses. I guess I'll know definitively in a week or
> so when the first roll comes back from the lab. (I have to mail out my
> film. No one locally does 120 format.)
Although I've worn glasses for years, I've never used them with a
camera. >> Stay informed about: Focusing question |
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External
Since: Feb 02, 2007
Posts: 30
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(Msg. 4) Posted: Sun Dec 02, 2007 7:04 am
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Fri, 30 Nov 2007 22:17:15 -0500, "rwalker" <rwalker RemoveThis @despammed.com>
wrote:
> I am new to medium format photography. I've just gotten a Yashica D TLR.
> Using the focusing screen with the magnifier is taking some adaptation.
> First of all, I am 50 years old and wear bifocals. When I look into the
> magnifier to focus, the line between my bifocal and the normal part of my
> glasses lens hits just about the center of the magnifier. If I lower my
> head slightly, I am then looking through the top part of my glasses, and
> focusing becomes much easier. I guess my question, bottom line, is should I
> be looking through my bifocal at the magnifier, or should I be looking
> through the upper part of my glasses lens?
Through the upper part. The magnifier is set to give an effective
image distance of two or three metres so you should use the part
of your glasses that gives you comfortable vision at that distance.
(At least, that's how my own Yashica TLR is set up.)
--
Matthew Winn
[If replying by mail remove the "r" from "urk"] >> Stay informed about: Focusing question |
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External
Since: Dec 03, 2007
Posts: 5
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(Msg. 5) Posted: Mon Dec 03, 2007 10:21 am
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Dec 2, 5:02 am, Matthew Winn <*...@matthewwinn.me.urk> wrote:
> On Fri, 30 Nov 2007 22:17:15 -0500, "rwalker" <rwal... RemoveThis @despammed.com>
> wrote:
>
> > I am new to medium format photography. I've just gotten a Yashica D TLR.
> > Using the focusing screen with the magnifier is taking some adaptation.
> > First of all, I am 50 years old and wear bifocals. When I look into the
> > magnifier to focus, the line between my bifocal and the normal part of my
> > glasses lens hits just about the center of the magnifier. If I lower my
> > head slightly, I am then looking through the top part of my glasses, and
> > focusing becomes much easier. I guess my question, bottom line, is should I
> > be looking through my bifocal at the magnifier, or should I be looking
> > through the upper part of my glasses lens?
>
> Through the upper part. The magnifier is set to give an effective
> image distance of two or three metres so you should use the part
> of your glasses that gives you comfortable vision at that distance.
> (At least, that's how my own Yashica TLR is set up.)
>
There is a subtle point here. You need to be able to focus your
vision sharply on the underside / matte side of the focusing screen.
If your screen has lines or focusing aids like a split or microprism
then those lines or edges or even dust on the matte surface must be
perfectly sharp. Then focus the reflected image through the lens.
If you cannot focus your eyes on the screen, the image cannot be
brought into sharp focus at the correct place. So use whatever
correction combination that allows you to focus on the screen. This
is the whole point of diopter correction lenses for viewfinders and
the reason I'm saving up for a PM45. >> Stay informed about: Focusing question |
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External
Since: Oct 31, 2007
Posts: 39
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(Msg. 6) Posted: Mon Dec 03, 2007 2:05 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Matthew Winn" <*@matthewwinn.me.urk> wrote in message
news:slu4l3ds49pcpvhbn5rg994n7bqi87sb9a@4ax.com...
> On Fri, 30 Nov 2007 22:17:15 -0500, "rwalker" <rwalker.DeleteThis@despammed.com>
> wrote:
>
>> I am new to medium format photography. I've just gotten a Yashica D TLR.
>> Using the focusing screen with the magnifier is taking some adaptation.
>> First of all, I am 50 years old and wear bifocals. When I look into the
>> magnifier to focus, the line between my bifocal and the normal part of my
>> glasses lens hits just about the center of the magnifier. If I lower my
>> head slightly, I am then looking through the top part of my glasses, and
>> focusing becomes much easier. I guess my question, bottom line, is
>> should I
>> be looking through my bifocal at the magnifier, or should I be looking
>> through the upper part of my glasses lens?
>
> Through the upper part. The magnifier is set to give an effective
> image distance of two or three metres so you should use the part
> of your glasses that gives you comfortable vision at that distance.
> (At least, that's how my own Yashica TLR is set up.)
>
Thank you for a thoughtful response. That's pretty much the conclusion I've
come to. >> Stay informed about: Focusing question |
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External
Since: Oct 31, 2007
Posts: 39
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(Msg. 7) Posted: Mon Dec 03, 2007 2:06 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"dadiOH" <dadiOH.DeleteThis@guesswhere.com> wrote in message
news:%Za4j.325$gi7.239@trnddc04...
> rwalker wrote:
>> I am new to medium format photography. I've just gotten a Yashica
>> D TLR. Using the focusing screen with the magnifier is taking some
>> adaptation. First of all, I am 50 years old and wear bifocals.
>> When I look into the magnifier to focus, the line between my
>> bifocal and the normal part of my glasses lens hits just about the
>> center of the magnifier. If I lower my head slightly, I am then
>> looking through the top part of my glasses, and focusing becomes
>> much easier. I guess my question, bottom line, is should I be
>> looking through my bifocal at the magnifier, or should I be looking
>> through the upper part of my glasses lens?
>
> Let me make a wild - almost incredible - statement and say you should
> look through the part that allows you to see best.
>
> --
>
>
Either will allow a clear view with appropriate focusing. However, only
viewing with one or the other is going to result in appropriate focusing on
the film plain, hence the question.
Never jump to conclusions. >> Stay informed about: Focusing question |
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External
Since: Oct 31, 2007
Posts: 39
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(Msg. 8) Posted: Mon Dec 03, 2007 2:07 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Bob Kirkpatrick" <bob.kirkpatrick.RemoveThis@heapg.com> wrote in message
news:5be1562b-109a-40a5-a91c-2983909ca333@e1g2000hsh.googlegroups.com...
snip
>>
>
> There is a subtle point here. You need to be able to focus your
> vision sharply on the underside / matte side of the focusing screen.
> If your screen has lines or focusing aids like a split or microprism
> then those lines or edges or even dust on the matte surface must be
> perfectly sharp. Then focus the reflected image through the lens.
> If you cannot focus your eyes on the screen, the image cannot be
> brought into sharp focus at the correct place. So use whatever
> correction combination that allows you to focus on the screen. This
> is the whole point of diopter correction lenses for viewfinders and
> the reason I'm saving up for a PM45.
>
Thanks for the thoughtful response. >> Stay informed about: Focusing question |
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External
Since: Mar 28, 2004
Posts: 499
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(Msg. 9) Posted: Mon Dec 03, 2007 4:43 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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rwalker wrote:
> Either will allow a clear view with appropriate focusing. However, only
> viewing with one or the other is going to result in appropriate focusing
> on the film plain, hence the question.
That's not correct.
You are looking at an image, that is formed at the plane of the (underside
of) the focussing screen.
As long as you focus the lens so that the images looks sharpest to you, the
image as recorded on film will (assuming that the camera is not out of
whack) also be sharpest.
The only thing your eye glasses do is allow you to judge better (or worse)
when the image is sharpest. They have no influence on focussing in any other
way. >> Stay informed about: Focusing question |
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External
Since: Sep 04, 2007
Posts: 18
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(Msg. 10) Posted: Sun Dec 09, 2007 4:45 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Bob Kirkpatrick" <bob.kirkpatrick DeleteThis @heapg.com> wrote in message
news:5be1562b-109a-40a5-a91c-2983909ca333@e1g2000hsh.googlegroups.com...
> On Dec 2, 5:02 am, Matthew Winn <*...@matthewwinn.me.urk> wrote:
>> On Fri, 30 Nov 2007 22:17:15 -0500, "rwalker" <rwal... DeleteThis @despammed.com>
>> wrote:
>>
>> > I am new to medium format photography. I've just gotten a Yashica D
>> > TLR.
>> > Using the focusing screen with the magnifier is taking some adaptation.
>> > First of all, I am 50 years old and wear bifocals. When I look into
>> > the
>> > magnifier to focus, the line between my bifocal and the normal part of
>> > my
>> > glasses lens hits just about the center of the magnifier. If I lower
>> > my
>> > head slightly, I am then looking through the top part of my glasses,
>> > and
>> > focusing becomes much easier. I guess my question, bottom line, is
>> > should I
>> > be looking through my bifocal at the magnifier, or should I be looking
>> > through the upper part of my glasses lens?
>>
>> Through the upper part. The magnifier is set to give an effective
>> image distance of two or three metres so you should use the part
>> of your glasses that gives you comfortable vision at that distance.
>> (At least, that's how my own Yashica TLR is set up.)
>>
>
> There is a subtle point here. You need to be able to focus your
> vision sharply on the underside / matte side of the focusing screen.
> If your screen has lines or focusing aids like a split or microprism
> then those lines or edges or even dust on the matte surface must be
> perfectly sharp. Then focus the reflected image through the lens.
> If you cannot focus your eyes on the screen, the image cannot be
> brought into sharp focus at the correct place. So use whatever
> correction combination that allows you to focus on the screen. This
> is the whole point of diopter correction lenses for viewfinders and
> the reason I'm saving up for a PM45.
>
True, but if a waist level finder is being used (as I suspect) then there is
no possiblilty if using a diopter correction lens on the viewfinder.
Rob. >> Stay informed about: Focusing question |
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External
Since: Oct 31, 2007
Posts: 39
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(Msg. 11) Posted: Sun Dec 09, 2007 7:14 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Rob Bradford" <rob.polymnia.TakeThisOut@btinternet.com> wrote in message
news:v6ydnX4n1pFHxcHanZ2dnUVZ8s6inZ2d@bt.com...
snip
>
> True, but if a waist level finder is being used (as I suspect) then there
> is no possiblilty if using a diopter correction lens on the viewfinder.
>
> Rob.
>
Yes, I am using a waist level viewfinder.
Another Rob >> Stay informed about: Focusing question |
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External
Since: Dec 03, 2007
Posts: 5
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(Msg. 12) Posted: Tue Dec 11, 2007 10:19 am
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Dec 9, 7:14 pm, "rwalker" <rwal....DeleteThis@despammed.com> wrote:
> "Rob Bradford" <rob.polym....DeleteThis@btinternet.com> wrote in message
>
> news:v6ydnX4n1pFHxcHanZ2dnUVZ8s6inZ2d@bt.com...
>
> snip
>
>
>
> > True, but if a waist level finder is being used (as I suspect) then there
> > is no possiblilty if using a diopter correction lens on the viewfinder.
>
> > Rob.
>
> Yes, I am using a waist level viewfinder.
>
> Another Rob
If you are far sighted, reading glasses from the drugstore are the
same as diopters when using a waist level finder. Pick a pair that
allows you to focus on the matte screen when you are holding the
camera at your waist. If you are near sighted, your ophthomologist or
optometrist can give you a prescription for a specific focusing
distance like your waist. At least one older photographer I know of
has four different prescriptions in his bifocal photography glasses
and mentally switches eyes depending upon the distance. >> Stay informed about: Focusing question |
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External
Since: Oct 31, 2007
Posts: 39
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(Msg. 13) Posted: Tue Dec 11, 2007 9:27 pm
Post subject: Re: Focusing question [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Bob Kirkpatrick" <bob.kirkpatrick.DeleteThis@heapg.com> wrote in message
news:59ad244d-078c-40f6-95ed-e654cd538784@f3g2000hsg.googlegroups.com...
snip
>
> If you are far sighted, reading glasses from the drugstore are the
> same as diopters when using a waist level finder. Pick a pair that
> allows you to focus on the matte screen when you are holding the
> camera at your waist. If you are near sighted, your ophthomologist or
> optometrist can give you a prescription for a specific focusing
> distance like your waist. At least one older photographer I know of
> has four different prescriptions in his bifocal photography glasses
> and mentally switches eyes depending upon the distance.
>
Thanks. That sounds worth checking in to. >> Stay informed about: Focusing question |
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