For any UK shooters; I was browsing 7dayshop.com and Velvia 50 and 100 are
10-11 pounds per pro pack (5 rolls) dated to May 2012 iirc.
HHPhoto:
Sorry, but that is just bunk.
We are talking about film here, not scans and prints. That is a bit of a straw man. The same will be said of E-6 scans with different scanners, and different people. They may use the film as a reference, but the scanning work flow and monitor needs to be fully calibrated. And the actual viewing itself of the E-6 slide introduces more variables for scan inconsistency. How it is viewed, in what conditions while matching.
If they are going through so much trouble for so much consistency. They will likely have an IT8 target setup for their own process - Velvia 100f through their own chemistry, Portra 160 through their own chemistry, etc.
If you are otherwise just paying for cheap noritsu/frontier scans that are automated. Then well, that is a different issue not related to the film.
That is an inaccurate picture you're painting. Different results is not caused by the film. The results (we're comparing film v film here) you get back from the labs would all be as identical as possibly can be from the labs running consistent chemistry with test strips. You are more likely to find differences on E-6 films, since the time may be adjusted within range off aim to get a good test strip, changing the time will affect colour balance a little, and probably have slightly mismatched contrast curves of the colour layers.
Rigorous testing has indicated C-41 films a fair way in front of ANY E-6 films including Provia, test put together. It isn't theory, it's practise. Real world results: C-41 is THE colour accurate material. E-6 is not colour accurate, has a smaller gamut, and can suffer other problems, such as dropping detail in highly coloured objects.
I'm sorry, but your tests cannot be accurate if that is what they show. Talk to Ron Mowrey, he is often on APUG, he is the most qualified and knowledgeable person on this subject (more than anyone else that is willing to discuss it). He has performed more in depth and rigorous testing than anyone during his time making these products. You can't beat the physics of imperfect dyes. Regardless of how much you want to insist that E-6 is more accurate than C-41, it just simply isn't, and your word isn't good enough to go against known established fact.
There is 1 very good way to deal with high contrast with C-41 - just expose the film normally. No tricks. No gimmicks. No fogging the film. No stuffing around. Load the film in your camera, and start shooting. Process normally. Enjoy your images however you please, not simply how Fuji decided they should be rendered.
Which are not a problem in 95% of the shooting situations, because the object contrast is not higher than what the film can capture. Provia 100F and 400X for example can handle about 8 stops. It is the exception, not the norm that the object contrast is higher than that.
And in situations with higher contrast than 8 stops you can use
- diffuse pre exposure
- balanced fill-in flash
to handle these higher object contrasts very successfully (as described in my post above).
Cheers, Jan
Balanced fill in flash is not suitable in landscapes. It is also not always suitable, you are changing the lighting setup. I presume film shooters here are photography enthusiasts. Fill flash is in many cases a compromise unless part of the desired look of the image. Other times, yes, it is useful, but that goes for negative, slide, or digital. People against a sunset background for example, you will need to light them.
When fill flash is suitable, looks good, it doubly goes for neg and digital. It is not an argument to choose slide over something else.
In any case, you are suggesting to a range finder user to use TTL fill flash as a solution, so that they can shoot slide instead of negative? Fill flash isn't a reason to use slide over negative. Also I am unaware of many rangefinder's (especially the one's people here use) having popup flashes with TTL functionality. Or are you suggesting they start using one type of camera over their preference so that they can shoot slide instead?
Regarding pre-exposure; sure I'll pull out my portable dark room out in the middle of the forest next time, and stuff around for a few hours instead of loading the film and be shooting within a minute.
Granted, I suppose you could use an on lens-diffuser. Like the digital white balance expo-discs take one exposure in camera, then double expose with the resulting image. This still doesn't help with the below points about intense objects or bright objects. It will allow you to expose less without being muddy, but that's all, the pre-exposure+underexposure is still pushing up to the those areas to the same values. All you're doing is fogging the film, and causing a loss of contrast. Which will reduce also your sharpness, which can be quite severe depending on the level of pre-exposure. As your response rate at x spatial frequency will be lowered due lower contrast.
I also wouldn't want to do this on location, as in my case, there is no neutral coloured source in a 5600K situation to shoot (there was 5600K light but not on me specifically), as to not colour-bias/cast the slide. You can do post-exposure afterwards, but it is risky business, if you make a mistake in the amount or stuff it up, you compromise or lose the shot.
Regardless, it would take more time to shoot on location, I wouldn't be up and shooting quickly, I'd need to measure the amount of fog exposure to add with more intricate metering and calculations, as opposed to simple incident metering, exposing once, and moving on.
And I still wouldn't have been able to expose that long in direct sun to get movement in the water, in my above example.
Fogging the film is not a useful solution. I would never suggest for someone to go and fog their film. I would suggest to use the right material for the job.
You're also replying to someone talking about latitude, rather than dynamic range, slide doesn't have latitude. It is not made for major adjustments.
The straight line portion of Provia 100f is 5 stops. There is another 1 and 2/3rds of stops of visible (dense) lower shadow contrast on the toe. Before the contrast is a flat line (nothing). There is a little bit of room above the straight line, but not much, and I certainly would not rely on it in the real world to capture anything I wanted to be there on the slide.
Apart from the contrast curves mismatching as you get above the straight line.
When you make a regular normal exposure, in many situations you are going to lose highlights, or even simply bright detail, even in flat/overcast lighting that typically has a small dynamic range. Because one bright object is above the cut off point of slide film. Underexposing isn't an option for slide if don't like muddy looking slides. You simply have to accept that there won't be detail there (not always important) - if you even realise that is just a tad too bright to be recorded (usually not noticed).
If it's a heavily coloured object rather than neutral it may look funky in colour even.
Last example I saw, was just a pet photo in overcast conditions, good bang on correct exposure, one section of a light tan fur on the dog's head was a bit too hot, not particularly important, contrast was very nice and optimal, any exposure change would only give an overall poorer image. But I am responding to your concept here. Underexposing would make it look terrible. As would fogging the film + underexposing and washing out the image.
You don't want to particularly underexpose, or you'll lose so much, and everything will be muddy.
It is not not high contrast scenes you run into these problems, it is every day scenes. They may or may not be important to some people.
But to say that that Provia will represent an 8 stop scene, and will only have problem in scenes over 8 stops is simply not true, when it can't even fully render 3 stop scenes in some cases given proper exposure.
The curve of Provia may fit 8 stops. But it is not a useful 8 stops,
because it has no latitude for exposure adjustment. But this is only in a perfect ideal, not in the real world. It doesn't tell you about the lighting setup of the scene you are a shooting.
A 6 stop scene may need 3 stops of underexposure (if you wanted to represent X at midtones, but would need to place X 3 stops lower in order to fit in the entire scene's range). Etc etc etc.
Of course that underexposure of 3 stops, may be someone else's correct exposure, because they are not interested in rendering X as 'normal' (at midtones, say a human, and their skin at midtones), but capturing the lighting or other parts of the scene itself, which warrants that exposure as normal, then that fits into Provia's scale as a normal exposure for that person.
Hence, it is not a useful 8 stops. 8 stops will simply not fit on Provia in many scenes even with a basic 18% grey being placed at midtones in that scene. Let alone Bill who comes along and has a different idea to Joe about what should be placed at midtones, what should be placed at shadows, and what should be placed at highlights, etc.
Many slide shooters avoid some of the most beautiful lighting conditions. Backlit, high contrast (I would call 8 stops getting into high contrast for slide shooters, as many seem to stick mostly to overcast). I know my friend would simply not shoot his nature stuff (617 slides) when ever the sun came out.