Lessons, tips, tricks about photography, in particular digital photography.
Using a tripod is something not very common, but there are situations where without a tripod it it is impossible to get a great shot, tipically:
Stacking is a useful and common feature in most of advanced photo catalog/archiving software and consists in grouping multiple photos showing just one of them (the one that is put on top of the stack).
It is useful when you have multiple shots of the same subject and want to compact the display.
Each software have its own way of handling stacking. This article describes in detail how Adobe Lightroom handles stacks, that is not so intuitive (you'll see that depending on the function, the stack can be treated in a way or in another).
"How to focus properly?", "What does DOF mean?", "Is auto-focus precise?", "What does back-focus and front-focus mean"?
Focusing is not as easy as it could seem, but it's one of the most important technique in photography, since a dark or too bright photo can be corrected via software, while an out of focus photo very hardly if not at all.
This lesson presents the basic principles of focus that are useful to be known.
Today I'm going to talk about hot/dead pixels, those annoying pixels that show up typically on long exposures (starting from around 1 second), one the unwanted effect under the "digital noise" for long exposures and high ISO; you can see below in the image that blue of the sky is not a even color and it seems grainy, that is the digital noise.