Obsession with fast lenses
A lens is called fast when it has a greater aperture (f/1.8 is faster than f/5.6) which allows more light to reach the sensor allowing you to use a shorter exposure for the same available light.
Fast is obviously better, no question about that. But you also pay a price (literally). You need a larger lens, which is heavier and costs more. There are cases where this will come handy. If you like astrophotography shoot indoors a lot, a faster lens makes a difference. And of course the aperture is not only about the exposure, it also sets the depth of field which is an importat tool that helps you compose your picture.
But look at the following three lenses (none of which I used so far)
| Focal length | Aperture | Weight | Price |
|---|---|---|---|
| 24mm | f/1.4 | 620g | 2'000 |
| 24mm | f/1.8 | 355g | 750 |
| 24mm | f/2.8 | 270g | 400 |
These pages are for Amateur Photographers and not really for seasoned photographers and professionals. I have no affiliation or commercial interest with any brand/make. I write from my own experience. I ended up using mainly Nikon, so I am more familiar with this brand than others. See price for notes on pricing as well as photography related links.