Rule of f16

As a photography student, I've had the "Rule of Sunny f16" drilled in to me.
I know with a 35mm what all the rules of thumb are; are they the same for a
6x9? I also usually overexpose my negatives about a half a stop to help get
a littl emore detail out of my highlights. Is this still neccessary with a
medium format?

Thanks!
Trevor Longino




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Hi

More then you ever wanted to know about the rule of f16.

The sun is a fixed light source although the light hitting the earth can be
vary with the time of year and angle. This varation can be from about 12000
foot candles at the equator to around 1250 foot candles at the very nothern
reaches of Canada.

Average is about 5000 foot candles which the rule of f16 is attached to.

Knowing this, you might want to use f22 in the summer in Florida (about 10,000
ft candles) and f11 at Christmas time in Maine (about 2500 ft candles).
Generally, f16 is good in Washington DC in September.

Larry

Knowing this, you might want to use f22 in the summer in Florida

Thanks. Given that is *is* summer, and I *am* in florida, I'll stop my lens
down a bit more.

Peeks out window But I don't see you out there, so how did you know?

Pacem!
Trevor






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Trevor Longino wrote:

Knowing this, you might want to use f22 in the summer in Florida

Thanks. Given that is *is* summer, and I *am* in florida, I'll stop my
lens
down a bit more.

Do they teach how to use one of those modern thingies? I believe they
call'em "meters", but i'm not sure.

"Q.G. de Bakker" wrote in message
i.nl...

Do they teach how to use one of those modern thingies? I believe they
call'em "meters", but i'm not sure.

Meter? Whazat? I just look at my eyes in a mirror and determine F-Stop by
the size of my iris. Funny, but I tend to overexpose on Saturday mornings.

Do they teach how to use one of those modern thingies? I believe they
call'em "meters", but i'm not sure.


Actually in astronomy class they teach you about look-up tables. Astronomy
class is all about look-up tables and less about looking at stars.

Anyway, there is a look up table for sunlight levels vs solar altitude, date
and time of day. So instead of using a meter just use the lookup table. Now
quick question. How much light is falling on Erie Pa on the date November 12 at
1:45 in the afternoon? Just pull out the look-up table and in 2 minutes, you
have the answer. You don't even have to go there. Let me tell you, you don't
want to be there anytime after the 15 of October anyway.

Larry

Hemi4268 wrote:

Actually in astronomy class they teach you about look-up tables.
Astronomy
class is all about look-up tables and less about looking at stars.

Anyway, there is a look up table for sunlight levels vs solar altitude,
date
and time of day. So instead of using a meter just use the lookup table.
Now
quick question. How much light is falling on Erie Pa on the date November
12 at
1:45 in the afternoon? Just pull out the look-up table and in 2 minutes,
you
have the answer. You don't even have to go there. Let me tell you, you
don't
want to be there anytime after the 15 of October anyway.

So you look up the weather in an almanac too?

Hemi4268 wrote:

Generally, f16 is good in Washington DC in September.

It is pretty good also here in Europe.

-- Lassi

"Lassi Hippeläinen" wrote:
Hemi4268 wrote:

Generally, f16 is good in Washington DC in September.

It is pretty good also here in Europe.

In Japan, my eye tells me that the light is bright and harsh, but when I
actually meter things, f/8 seems to be the most common result at 1/film
speed.

Maybe I need a vacation.

David J. Littleboy
Tokyo, Japan

In Japan, my eye tells me that the light is bright and harsh, but when I
actually meter things, f/8 seems to be the most common result at 1/film
speed.

At f-8 would mean 1250 foot candles. Maybe London at Christmas time. Maybe
even North Korea but your at least a stop off anywhere in Japan.

Larry