There are a range of Photoshop plugins to assist with enlarging image files.
Attached Mac User article article discussing the most recent versions of these plugins. The conclusion to draw is the type of enlargement software used, really depends on the file you start with. The plugins mentioned make a noticeable difference to enlargement of web-graphics.
Cameras! It’s almost impossible to get away from cameras nowadays, yet most of us use them with the bare minimum of knowledge required to snap the nearest tweet-worthy scene. That’s not because we don’t care about truly pretty pictures — even casual observers know the difference between good and bad photography — but have you tried to make an educated choice between cameras lately?
Spec sheets are laden with alien terminology like ISO and F numbers, and once you manage to get a grasp of what those mean, you’re still confronted with a spectacular variety of options. To help you navigate your way through this quagmire of excess information, we8217;ve put together this guide. It8217;ll enlighten you about which specs are important when, and what cameras are suitable for whom. Sound good? Then read on!
Basic skin retouching using frequency separation and dodging & burning. I use this process on every photo that I do, and I usually spend about 4-5 minutes on headshots like this (and less time on full body shots when there is obviously less detail in the face). This is not intended to be a high-end retouching tutorial, but techniques that can help people who want to do natural-looking retouching while maintaining most of the natural skin texture!
Frequency separation is a technique that allows you to give skin a smooth-yet-sharp look.
[Frequency separation is] a technique that enables you to selectively process not only different areas of an image, but also different detail levels. Frequency separation involves creating a high detail (high spatial frequency) layer and a low detail layer from a source image [...] Using this technique enables you to smooth and rework rough and fine details independently, and opens up some very high-quality and non-destructive methods with which to sharpen your images.
In this extensive article photographer Robert Thomas explains how blend modes work in Photoshop. He shows how to manipulate blend layers through keyboard shortcuts, as well explains the actual mathematical operations that drives each mode.
Want to play around with SLR Camera settings and see how it affects your photo, but without actually using an SLR? Well, you can do just that with the Online SLR Camera Simulator. This simple application allows you to choose the lighting, ISO, shutter speed and aperture. A great tool to teach someone the basics of photography.