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nt
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      01-24-2004, 03:05 AM
Could someone please add to the f.stop scale for me, need to know it upto
about 500

1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /

thanks

n.t.


 
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Andrew Mc
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      01-24-2004, 03:24 AM
In article <NilQb.146$(E-Mail Removed)>, nt says...
>
>Could someone please add to the f.stop scale for me, need to know it upto
>about 500
>
>1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /
>
>thanks
>
>n.t.
>
>


Just take the square root of 2 (approximately 1.4) and keep multiplying it by
itself.

 
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Ron
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      01-24-2004, 03:51 AM
1 1.4 2 2.8 4 5.6 8 11 16 22 31 44 63 89 125 177
250 354 501 709
but why ?
YMMV
Ron

"nt" <(E-Mail Removed)> wrote in message
news:NilQb.146$(E-Mail Removed)...
> Could someone please add to the f.stop scale for me, need to know it upto
> about 500
>
> 1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /
>
> thanks
>
> n.t.
>
>



 
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Ron
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      01-24-2004, 03:57 AM
as you can see from Andrews post there are different ways of determining it
and it will vary the number but you will need a big lens for any of the
larger values as the hole size is very small on even a 50mm lens
Ron
"Ron" <(E-Mail Removed)> wrote in message
news:4011ebaf$0$14480$(E-Mail Removed) u...
> 1 1.4 2 2.8 4 5.6 8 11 16 22 31 44 63 89 125 177
> 250 354 501 709
> but why ?
> YMMV
> Ron
>
> "nt" <(E-Mail Removed)> wrote in message
> news:NilQb.146$(E-Mail Removed)...
> > Could someone please add to the f.stop scale for me, need to know it

upto
> > about 500
> >
> > 1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /
> >
> > thanks
> >
> > n.t.
> >
> >

>
>



 
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Miro
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      01-24-2004, 04:30 AM

"Andrew Mc" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> In article <NilQb.146$(E-Mail Removed)>, nt says...
> >
> >Could someone please add to the f.stop scale for me, need to know it upto
> >about 500
> >
> >1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /
> >
> >thanks
> >
> >n.t.
> >
> >

>
> Just take the square root of 2 (approximately 1.4) and keep multiplying it

by
> itself.
>


The square root of 2 to the power of n, where n => 0


 
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nt
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      01-24-2004, 06:37 AM
Well i dont exactly need to put such a small stop on the lens, it's just to
work out some hi-speed cinematography and relative light levels at 2,000
fps.
thanks
n.t.

"Ron" <(E-Mail Removed)> wrote in message
news:4011ed22$0$14481$(E-Mail Removed) u...
> as you can see from Andrews post there are different ways of determining

it
> and it will vary the number but you will need a big lens for any of the
> larger values as the hole size is very small on even a 50mm lens
> Ron
> "Ron" <(E-Mail Removed)> wrote in message
> news:4011ebaf$0$14480$(E-Mail Removed) u...
> > 1 1.4 2 2.8 4 5.6 8 11 16 22 31 44 63 89 125

177
> > 250 354 501 709
> > but why ?
> > YMMV
> > Ron
> >
> > "nt" <(E-Mail Removed)> wrote in message
> > news:NilQb.146$(E-Mail Removed)...
> > > Could someone please add to the f.stop scale for me, need to know it

> upto
> > > about 500
> > >
> > > 1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /
> > >
> > > thanks
> > >
> > > n.t.
> > >
> > >

> >
> >

>
>



 
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Craig Taylor
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      01-24-2004, 09:15 AM

"nt" <(E-Mail Removed)> wrote in message
news:NilQb.146$(E-Mail Removed)...
> Could someone please add to the f.stop scale for me, need to know it upto
> about 500
>
> 1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /


Are you looking for values at 1/2 stop or 1/3 stop intervals?


 
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Jim
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      01-24-2004, 09:45 AM


nt wrote:
> Well i dont exactly need to put such a small stop on the lens, it's just to
> work out some hi-speed cinematography and relative light levels at 2,000
> fps.
> thanks
> n.t.
>



i've got one of those lightmeter scales for my pentax spotmeter. It was
specially adapted for the meter. You can read the values straight off.
And the meter was used for that exact purpose.



 
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reg-john
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      01-24-2004, 03:48 PM
full stop


"Craig Taylor" <(E-Mail Removed)> wrote in message
news:4012374e$0$1731$(E-Mail Removed) u...
>
> "nt" <(E-Mail Removed)> wrote in message
> news:NilQb.146$(E-Mail Removed)...
> > Could someone please add to the f.stop scale for me, need to know it

upto
> > about 500
> >
> > 1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /

>
> Are you looking for values at 1/2 stop or 1/3 stop intervals?
>
>



 
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nt
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      01-25-2004, 12:33 AM
thanks for the relpies, i actually forgot about the square-root-of-2 method
since film school and this will fulfill my needs very well.
n.t



"nt" <(E-Mail Removed)> wrote in message
news:NilQb.146$(E-Mail Removed)...
> Could someone please add to the f.stop scale for me, need to know it upto
> about 500
>
> 1/ 1.4 / 2 / 2.8 / 4 / 5.6 / 8 / 11 / 16 / 22 / 32 / 45 / 64 /
>
> thanks
>
> n.t.
>
>



 
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