The Electrical Engineer

What is Halation Halation is an effect in film photography where light reflects off the back of the film/film plane and re-exposes the image. In most film it's typically very controlled, and it's a subtle effect you sometimes notice. The below photo has a bit happening on the brightest spots. I honestly never really thought much about it, as while you would see it on very bright objects, it was very tame, and just part of the natural look of film. This is a trend for very bright edges in a film image to bleed into the surrounding area. It tends to be reddish due to how the effect happens. We can make some general observations from this photo. It's reddish in color It's soft and blurry It's only around the brightest highlights It's more pronounced between highlights and much darker parts of the image. With that in mind, it helps to consider what is happening in a simplified cross section of color film. Color film generally works by having 3 light sensitive layer...

The Short Answer: I think part of the confusion is because of the word Log.  All Log refers to is the type of function applied to the input values before being stored. This function is a logarithm instead of the typical exponent used. And has the characteristic that even as the input value increases dramatically in size, the rate of increase for the output value grows slower. For example Log2 of a series of numbers counting from 0->1024 would result in numbers from 0->10 but Log2 of a number 0->256 would be 0->8. It grows slower as the numbers get larger which has the benefit of compressing bright parts of the image before clipping. And that's really all there is to the log part. But why is it flat? I think what most people actually wonder about is why does LOG look flat? The answer is basically made up of a couple pieces. We are going to start with an OOC version of a photo. (OOC means Out Of Camera, as it not edited by the user) It looks like a normal landscape photo....

Generally there isn't too much exciting happening with films. Mostly the less popular ones go away, but the people at CineStill have done something fun. They've taken a few of the newest stocks from Kodak and did a good job repackaging it for normal color chemistry and use. The one that had the most interest to me was the  800Tungsten . It's pretty much the VISION3 500T stock use for cinema (You can see the 5219 markings on the negatives), but it's had the REMJET removed making it safe for C-41 processing. The question I had was what is it like to shoot, and is it worth the extra expense a roll. I had a hard time finding details of the sorts of quirks of this film, so I thought I would share my own experience. ISO 800 or ISO 400 First I would say I am not sure I agree with the speed rating. The very first roll I shot at 800 and felt generally the results were on the underexposed side. It doesn't make or break a shot, but generally shooting at ...