A friend of mine figured out that my 135mm $14.00 lens is the fastest one.
A lens speed is actually quantifying its aperture, or the amount of light it gets trough.
This one is f/2.8.
With a wide open aperture, the shutter speed is the fastest (thus the name).
However, the dept of field is the shallowest. This means that the focus area is limited. It's is usually desired for portraits.
It is also required for action shots, to get them sharp...
... to fully enjoy it, I spent some time mastering my focusing skills (remember, no automatic focus).
It forced me to think spatially. I had to understand where the focus area is before a runner comes and start taking pictures once they enter it.
Another tip. As you take continues shots, makes sure that they are written fast enough so there is no delay. Get the fastest card that is available to you and set the image size to medium or small.
It's ok to have a good shot in a smaller file...
I'm pretty happy with my choice of lenses. Even though I have my favorites focal length considered, some of my lenses are macro and I didn't try macro photography yet.
Who knows, I might have a good macro lens in my bag that I don't appreciate right now.
Clearly, I have plans on expanding the collection.
I've ordered a 500mm lens.
I want to get a 50mm/1.4 lens for portraits. They are quite expensive, but give a very shallow dept of field. 28mm/2.8 is also in my wish list.
Importantly, I want to get a telecoverter, it's an addon that increments the focal length of an existing lens.
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