Don't! From my sorry experience, esp. at high altitude, the brightener in the paper fluoresces (UV converted to blue). If you take that as a neutral reference, the "neutralized" pictures will in fact be yellowish.a sheet of white paper is just fine.
The Original Poster is going on holidays and he has shot so far only a few films. Nonetheless, he chose to only carry film with him, which is very nice to hear! Let's encourage him with practical and sound advice so that he might be a very happy film user also in the future and so that his "inexperience" with film will not damage his photography.
In a line, let's try not to scare him with too much technical details about zone placement, spot metering, color temperature, lighting ratios etc
To the OP I'd say: don't worry too much. Don't worry at all. Colour negative film is ultimately very forgiving. It's certainly easier to use than digital. With digital it's much easier to blow highlights in high-contrast situations. Film simplifies life! Correct and well thought-about exposure certainly gives better results but during holidays very often there's no much time to think too much, e.g. when going around with a group of persons, on a guided tour, a boat etc. In those situations negative film is the safest choice.
A few more suggestions: be careful of heat. Don't let the camera or film let's say in a glove compartment under the sun or in the boot of a car. Keep the film "fresh" when possible. Establish a clear "convention" for used canisters (impressed canisters) and virgin ones. I personally always rewind the film tail inside the canister to distinguish the impressed ones. Perfectionists will prefer to leave the tail outside of the canister (so as to minimize the risk of light leaks) but in that case be scrupulous in marking/separating the used ones. If you use a marker to mark canisters, make the marking immediately, before opening the new roll. Do observe the advice to change your rolls in shade. If you are in the sun in an open desert, do use your body to project a shadow on the camera while changing the roll. When you change canister do use your pump to dislodge dust particles from the inside of the camera. Always have spare batteries with you: don't leave them in the tent, or in the hotel. Find a place to have spare batteries always with you when you have a camera, things like your purse, your document holder, or a pocket of your photographic bag.
Fabrizio
Don't! From my sorry experience, esp. at high altitude, the brightener in the paper fluoresces (UV converted to blue). If you take that as a neutral reference, the "neutralized" pictures will in fact be yellowish.
Incident or spot?
How would you incident read a scene like this in order to expose Portra 160 (presuming you don't want anything blocked up).
http://static.timparkin.co.uk/static/tmp/portra-test.jpg
And here's another one..
http://www.timparkin.co.uk/photo/white-oak/
and another one..
http://www.timparkin.co.uk/photo/worms-tail/
Tim
Not to hijack the original topic, with colour negative, first picture, I would point the dome toward the camera from an arm length, while projecting a shade on the dome with the other hand, or, if possible, I would measure the exposure on the shade side of the walls. By the way, this picture definitely looks like it was taken with a digital camera rather than with film, the highlights on the upper right corners are clipped, which can clearly be seen by the grey sky, "recovery" function didn't recover colour information. That's strange, scanners should have no problems in capturing all the dynamic range of a colour negative. A colour negative should - if its dynamic range is exceeded - gently blend skyblue into white without any grey sky in between, which is a typical digital-capture behaviour.
Second picture, it's not clear to me what it is, the situation.
Third picture, I would just point the dome toward myself although I cannot see if the environment surrounding the photographer might falsify the reading (something reflective near me and not near the rocks), and I would rely on the colour negative dynamic range to preserve as much sky as possible before the blending into the white.
Not easy to say as the incident meter should be put near the subject so as to capture the light reflected from nearby objects (the grass in the first example reflects some light back to the walls) so if it isn't possible to put the instrument near the subject one must have recourse to some mental calculation.
Oak leaves underwater with the reflection from the overcast sky being broken by an overhanging branch creating a semitransparent area. Correct incident would have to be taken underwater I imagine.
Incident or spot?
How would you incident read a scene like this in order to expose Portra 160 (presuming you don't want anything blocked up).
http://static.timparkin.co.uk/static/tmp/portra-test.jpg
And here's another one..
http://www.timparkin.co.uk/photo/white-oak/
and another one..
http://www.timparkin.co.uk/photo/worms-tail/
Tim
The old-school trick in lieu of a graycard was, causcasian skin tone = one stop above middle gray.
Doesn't work so well with darker complexions or an in-law of mine was a mailman in Las Vegas
with a very heavy tan (and his wife was pale - yay for a spotmeter!) Lots of the time, solid green grass like a lawn is very close to middle gray, at least for my meters. If I have to do something hokey like using internal metering in an SLR I'll aim it at a lawn or some gray rock or even asphalt
pavement. Think if I was the OP and wanted to keep things simple, I'd opt for Portra 400 with a little
more color saturation rather than 160. It will still have plenty of wiggle room.
Just remember that 160 is the softer of the two films, and flora,fauna,and rocks might look a little bland. It's more a portrait film giving gentle skintones. Portra 400 will have more spunk and obviously allow faster shutter speeds. Please excuse all my complicated explanations in the foregoing posts - but it might become useful in the long run to someone. Like I said, I'd just buy a slightly warm sky
filter and leave it on the whole time to both protect the lens and correct a little for excess blue
at high altitude or along the beach. Use whatever metering technique you are most comfortable with, including in-camera metering. Switching meters takes practice to perfect, and a vacation is
generally not the right time for that kind of distraction! Above all, have a fun and safe trip!
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