Metering snow?

So, I'm heading North in a week or so and hope to get some good photos of temples in the snow (I live in Japan). I plan to use mainly Astia, basically because I'm more used to it than anything else, but I've also got a box or two of TMAX too that I may use. Conventional hints and tips suggest that I meter the snow and then add 1.5 to 2.5 stops of exposure, depending on whether the snow's in bright sunlight or shade. Anyone got any advice? I can use Polaroids too, if they'll help. I don't get to see snow very often, so don't want to make a total hash of it, and'I'm in general a beginner too...

Use an incident light reading (from the subject position pointed

back at the camera) and you won't have to muck about with any factors.

Just transfer the meter reading to the camera.

If you have sunny skies you should be aware that shadows which

reflect blue sky will record lighter with most b&w films than your

eye (and meter) perceives. This will be somewhat mitigated by your

choice of TMX, which records blue values darker than most films, or

more like they appear. Nonetheless, your pictures will likely show

better tonal separation if you use of a medium yellow (#12, or

equivalent) or light to medium orange (#15, #18 or #21) filter with

TMX. This will darken the sky and shadows, which reflect the most

blue light, and produce images with greater tonal depth and dramatic

impact. I do not recommend filters as deep as red (#23, #25 or #29)

with TMX; these filters tend to be too strong with TMX and can

eliminate shadow detail, rendering shadows nearly black.

 

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Since you are a beginner, I'm not going to burden you with a

dissertation on the Zone system of tonal placement. Very simply,

however, if you meter from brightly lighted snow and open 2-3 stops,

it will look like bright white snow in your prints--given normal

development, of course. But that does not mean you should overexpose

every shot of snow you take. If your light is overcast, opening one

to two stops should be fine. If half your scene is snow and the rest

is darker tones (like pagodas, for example) then you might only want

to open slightly, say 1/2 stop, from an average meter reading. The

bottom line is, I recommend you bracket whenever possible (one stop

intervals should be fine, and go one stop over and under ["over"-"on"-

"under"] for average pictures and two stops for shots you aren't sure

of the exposure or those really special shots). It's not worth

trying to save a few dollars if it means losing a memorable

photograph. Have fun!

The Innu have over twenty words to describe snow, and each probably

would require different metering. As a start, eyeball the snow for

reflectivity - small frozen granules in bright sun add to the

required exposure - dry snow on a cloudy day requires less added

exposure and so on. And much depends on the effect you�re going

for, and the exposure range of the film you�re using.

 

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Two alternatives to reflected metering of the snow would be to use

either an incident meter, or a gray card with a reflected meter. I

see snow four to six months a year, and generally use an incident

meter and would consider that to be your best metering choice,

followed by the gray card. If you have to meter the snow with a

reflected meter, 1 1/2 to 2 1/4 stops over is a good ballpark

starting range, but again much depends on the type of snow, the light

conditions, the type of film, and the effect you require.

 

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The two hardest things to meter accurately without an incident meter

are coal mines and snow.

Something they never teach in photo class:if you take a

reflected readings:white card,a grey card & a black card.The black

card is 5 stops more exposure than the white card,and the grey is

dead between at 2.5 stops.This where the +2.5 stops comes from to

compensate for snow.

I just gave my Photo II class the simplified Zone System lecture

yesterday, and assigned them the task of making pictures of all-white

and all-black subjects. Unfortunately it hasn't snowed here so they'll

have to photograph sheets or sheep! I agree with Ted's advice above,

the two stop correction will work only if most or all of the scene is

white, or if the white part is the only part that really matters.

Remember the reflected or spot meter wants to make the tone it is

metering into a middle gray (Zone V). If you want something other than

a middle gray density on your negative (and hence your print) you have

to compensate. "Placing" the snow on Zone III (two stops over) will

give you enough density on the neg for the snow area to print white

and light gray with detail and texture. Placing it on Zone II (three

stops over) will give you more density on the neg, more white in the

print, and less detail. But the midtones and shadow areas will come

along for the ride. (Not necessarily a bad thing).

 

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When I use my spot meter, I often look for something in the scene that

I want to render as middle gray and meter off of that. The other tones

then fall into place. If there's a normal contrast range in your

scene, the snow will fall where it should, Zones III-I.

 

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You can control your snow (highlight) density even more with

development changes, but that gets a bit complicated.

 

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By the way, a question for incident meter users: I never could

understand how you accomplish this type of reading in the landscape.

Don't you have to travel over to your subject (the faraway pagoda or

mountain, for example) and stand there to get an accurate incident

reading? You're gonna end up with your own footprints in the snow

scene, and someone's gonna steal your equipment while you're gone.

 

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Cheers,

Oops, correction, make that Zone VII, not III. Snow will fall on Zones

VII-IX. I must be thinking negatively this morning! Time for coffee!

Using an incident meter is a good idea if you have access to one. An

incident reading will put you in the ballpark most of the time. You

can always check your incident reading against your reflected

reading. This will also give you a better sense of how to adjust

your meter readings from something as challenging as snow can be.

 

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For incident metering of distant scenes, you don't need to walk all

the way to your subject, provided your metering position and the

subject are met by the same general luminence. In other words, if

you and your subject are both in full sunlight, face your subject,

point the incident dome at yourself and you'll get the same reading

you'd get if you walked to the subject. Obviously, if the subject is

in shade and you are in sunlight, this won't work. But as long as you

match light conditions (sunlight to sunlight; open shade to open

shade, etc.) you will get accurate exposures.

 

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Oh, one more thing--BRACKET!

I forgot to mention one more key when using incident meters. Your

clothing and its reflectance can influence an incident reading. This

is most troublesome when you are wearing white or otherwise highly

reflective clothing and you are front lighted (the meter will be

facing you, so it is backlit). In this case your clothing acts as a

fill that your subject does not benefit from. To avoid errors under

these circumstances it's best to hold the meter off to the side or

above your head.

Every answer that has been given here, dealing with black and white

film, means nothing if you have not calibrated your system. Your

shutters may be slow or fast, your meter may be on or off, your

development tempeature may differ from others, you may not have the

same dilution, your agitation may be different, etc. etc. etc.

EVERYTHING AFFECTS EVERYTHING. In addition, and being more specific

to your question, alot depends on the lighting range you will

encounter. Black and white film will easily handle the range of

tones if everything is either in full sun or in full shade. It is

only when you have dark objects in shade and very light objects in

full sun that you have trouble. My suggestion is that you do some

tests on your own before you go on this trip. I would do a zone 1

test and a development time test using the exact chemicals and

procedures you will use for your trip negatives. Have fun. Kevin

I second the comments about incident metering. I do like to use the

zone system a lot, but also find myself using the incident in

situations like the above unless I know exactly what zone I want to

place an object on. For instance I did a dog portrait the other day

and really didn't know exactly what zone to put his particular tone of

fur on. So I used incident and it worked great. Snow scenes and scenes

with lots of dark objects seem to be easier this way for me as well.

So I am glad that I have one of those meters that lets me pick between

spot and incident for different situations...

 

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Scott

Just a quick additional word about incident metering - I'd suggest an

inexpensive incident used on every shot regardless of which final

metering method you use to arrive at your final exposure.

 

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You will in time become very good at determining the correct exposure

based on the ambient light measured by the incident meter, regardless

of your subject reflectivity, luminence, or distance. I recall a

thread some time ago perhaps titled " the meter in your head " which

dealt with this.

 

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I carry a Sekonic 398 incident only and have learned to use it in all

exposure conditions. An additional benefit is you learn to read and

understand light.

Gavin: you have been given excellent, if not always simple advice.

Here comes the simple: carry a Kodak Grey Card cut to shirt-pocket

size. Using a spot meter, with your arm fully extended turn the card

to roughly a similar plane as the snow and take a reading off the

card. The reading from the card is your reading. You can bracket if

you wish, 1/2 stops should be OK. Good Luck.

I agree with Edsel and Sandy...

 

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I have another method (which you all may already know) that I suggest

to beginners.... In case of you have only a spot meter and do not have

a gray card .. just meter the brightest part of the scene and meter the

darkest part of scene (the ones that are relevant to you..) then divide

it in half...

 

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Other zones will fall in place... or at least you have some starting

point to bracket...

"Don't you have to travel over to your subject (the faraway pagoda or

mountain, for example) and stand there to get an accurate incident

reading?"

The sun is 93 million miles away,incident readings from one

spot,is as good as another.

Gavin,

 

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No one seems to have said anything about metering for the Astia.

Here's what I do for transparency film:

 

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Under sunny skies, I meter snow in the sun and open up 1 1/3 stops.

Under cloudy skies, I open up 1 2/3 - 2 stops. With eveing or morning

light on the snow, I open up 1 stop.

 

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Keep in mind that I always make 2 or three identical exposures of

everything I photograph. I process only one of each, and then decide

whether I need to psuh or pull process the remaining versions of each

image.

The previous exposure suggestions assume that the snow is a dominant

component of your image. As other subject matter becomes more

important, like the temples, you need to meter them, too. It then

becomes a balancing act, because transparency film often can't handle

the exposure range within your composition (i.e., dark walls and

bright white snow). Working in the morning and evening reduces the

contrast. Otherwise, you should try compositions that emphasize one

component or the other (snow vs darker subjects). You can use flash

to balance the lighting, but that adds a lot of effort when you're

working with large format.

 

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Good luck,

Edsel Adams,

 

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Great name, wise guy, but I think you are incorrect. Ted Kaufman

explained it. Sure, you're right if you just want to meter the

sunlight. If the subject is in shade or partial shade that doesn't

help you much! I am often photographing subjects (such as the other

side of a street) where the light falling on the subject is completely

different from the light falling near me. Reflectivity off the ground

upwards (snow is a great reflector) is also going to affect the light

falling on the subject. I would never go out with just an incident

meter.

 

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Cheers,

By and large the light falling on a subject nearby in sun or shade is

the same intensity as the light falling on an object 1 mile away.

Variations which you can see with your eye can be seen with a meter

too. When using slide film and photograpphing a contrasty scene you

will need to determine which tones you will want to have accurately

depicted in your slide. The shadows or the highlights. Slide film will

reproduce 4 stops of tone, from black to white. Everyone here has

talked about incident and spot metering as if they alone will give you

the information you need to get the correct exposure. Neither will.

You need to know the contrast range of the entire scene more than what

the midtones will be. Just metering a grey card tells you next to

nothing about what you really want to know which is the contrast range

of the scene. If you have a scene with bright sunlit snow(zone 8) and

some deep shadows(zone 3) you are going to have to sacrifice one end

of the tonal scale or the other. The slide film will not reproduce

that range of tones. You shadows will be empty black or your snow will

be detailess white. Your choice. You can pre expose the frame to widen

the films latitude. Another way to meter is to meter the snow in the

sun and open up 2 2/3rds stops or meter the snow in the shade and open

up 2 stops. But remeber if the tonal range is greater than 4 stops

your shadows will come out empty. And if you haven't calibrated your

system then you may want to use these strategies and also bracket by

1/2 stop either way. And I am jealous as sin that you get to

photograph in Japan which I think is the most under represented

country photographically in the western world. James

Thanks a lot to all who answered this. I'm really looking forward to

this trip a lot, and have already packed and repacked and re-repacked

my camera! The only issue I'm now worrying about is whether my

carrying cart will get stuck in the snow... :o)

I suggest still metering for shadows, but develop your negatives so

that the snow falls in the zone VII-VIII range. In bright light, this

might mean some greater compensation (bigger N-). You might then need

to print on a higher grade to separate the mid-tones.

 

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I'm always struggling with snow. I think its really tough to

photograph snow in flat non-descript light. Some moderate hilights

usually make things nicer and more three dimensional. Have fun on

your trip!

 

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Chris

 

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www.jordanphoto.com

<p>hello -- i am following this thread with great interest. this might be somewhat a newbee question about incident metering, but here it goes.... i have been confused by the fact that the manual to my gossen light meter states that i would still have to compensate for snow or sand regardless of incident vs. reflective reading by 1.5 stops. i somewhat see to get a different impression here, suggesting that in the case of incident readings this wouldn't be necessary? i haven't been able (for the lack of snow) to test this myself, but would be curious to know:</p>

<p>besides the issue of film latitude and scene contrast do i usually <b>not </b>adjust exposure for incident readings?</p>

<p>thanks in advance.<br>

patrick.</p>