A friend asked, "What is tolerance? Let's try to talk about it in a simpler way." The so-called tolerance, to put it simply, is the ability of a photograph to record the lightest and darkest details and layers. Highly tolerant, the brightest and darkest aberrations will be shown more broadly. The details of the images with different luminosities can be preserved intact; on the contrary, the display of light difference can only be limited to a small area, and the dark images outside this area will be deleted (or not recorded).
Tolerance of different carriers
Well, with a very basic understanding, you can see the display of tolerance of different carriers.
Not in that light area... Byebye. Positive films are notoriously low tolerance, which means that if exposure is not too accurate, some pictures outside this tolerance will not be recorded. So generally speaking, taking a positive film requires a higher exposure accuracy, which is the reason.
Two, negative film
The strength of negative film is that it can retain more between light and darkness. Negative film, contrary to positive film, is a kind of carrier with high tolerance, but of course there are good and bad ones, but generally speaking, they are better than positive film. Generally speaking, black and white film is the strongest, followed by professional negative film, the worst is generally available in the vegetable market negative.
Third, the advantage of RAW RAW is that it can keep the light and darkness so that the information can be retained, but the post-processing will take a little more steps. Some people say that RAW is a highly tolerant positive film. In fact, it's true (just that the color may not be as good as the positive film). RAW means to arrange all the original light and dark records into a digital file, but in the computer to convert the data into a picture.
Generally speaking, RAW's recording ability is about 10EV, and some of them will be more powerful. Like Pentax K-5, there are 14.1 EV in the DXOMARK test, which is very close to the ability of professional negative film (the vegetable market has already surpassed).
Fourth, JPEG is very common in digital photography. However, the tolerance of JPEG depends on the conversion process of different cameras, but it is generally not high. Probably the reason is that JPEG is a transformed image file, after a certain degree of compression, the darkest light, that is to say, the human eye generally will not pay attention to the shade step away.
Is it not good to have low tolerance??
Actually, I can't say that. It depends on what you want to shoot.
Like a positive film, it has a very low tolerance, but no one will say that it is a rotten thing. But how to do it well when the picture light difference is so low? So there are different photographic techniques, such as erasing black cards, to make up for this problem. However, the modern shooting of digital friends should be aware of this, that is, the more tolerant carrier of late ability are relatively strong. Because the light and darkness that can be recorded are better, using later software to raise and lower the light and darkness can have a better effect.
Is high tolerance low contrast??
You can usually say that, but a little more rigorous is not. Maybe the details of light and darkness will not be so obvious and delicate. However, if carriers with high negative capacities, those data will still exist, but it is not so easy to distinguish.
160NC, Carl Zeiss 28-85/3.3-4
160NC, the lens is Leica's Sumitar 50/2
Negative film tolerance is the strongest??
Only when properly handled can that effect be achieved. It seems that you can't see tolerance in general negatives scanners, especially when they are scanned by stores. Because the store's processing will generally be more suitable for the public taste, will try to improve the contrast of the processed photos, mostly after such processing, and then converted into JPEG, the details and light and dark tones can be seen will not exist.
How to present negative films??
We need to look at the preferences of those responsible for scanning. To present that feeling, the process of processing actually requires more rigorous methods.
How to present depends on the preferences of the person responsible for the scan.