From Mass Media to Art Works
It is told that the transfer technique was discovered reather erroreous just by some sloppy worrk within the Polaroid laboratoires. Now the idea of producing unique litle piecies of art has become quite fashionate.
Instead of talking about JPEG-Compression and its artefacts I'd rather show them to you.
JPEG is a format for image files which where the file size can be significantly influenced. The smaller the file size is the worse will the picture look like, especially in its details. This is because the JPEG compression in general is destructive.
Strictly spoken there is a number of compression algorithms standardized and possible within JPEG files. It is currently being discussed to introduce some additional non-destructive algorithm to the JPEG specification. However, I don't want to go into details of what theoretically may be possible but want to focus on the most popular algorithm which is very widely used. When you just click on "save as jpeg" then this is most likely the algorithm that is being used.
A Tutorial for Digital Infrared Photography
Tübingen Beyond Red
In this brief tutorial you will learn the basic steps from the image out of the camera to this final with a couple of mouse clics using free software only.
How UV-Filters may Damage Your Photographs
Often UV-Filters and similar (Sky, 1A, KR1, etc) are used for pure protection purposes only. Whether a filter is capable of protecting a lens at all is questionable and heavily discussed in the web. This article, however, focusses on the cost of this questionable protection - the damage that filters can do to your actual photography.
This kind of arrebation is always there when you use an UV filter for whatever purpose, although it is significant and clearly visible on night shots and other situations with very high contrasts. While collecting these example photographs I got a studio photography with two women in front of an illuminated white background. The girl's silhouette was visible in each other's faces caused by the same phenomenon that I am presenting here. Unfortunately one of these ladies did not agree to publishing the photograph in this context. That I have to respect.
For a start I show you the effects that Axel observed when he photographed some firework with a filter as protection.