We’ve already covered some of the pros and cons in the article Why I’m choosing a mirrorless lens over a DSLR and why it matters. This point is crucial in order for you to make the right choice, and it’s one of the first things that will influence your decision.
If you’re purchasing an autofocus lens, do you want it to be fast? Is it going to get you from point A to point B within the desired time frame? If it’s going to be used primarily for portrait photography, you need to be concerned with image quality.
What about high ISO image quality? Do you want to keep it low? Do you want to keep noise down? Does ISO affect image quality?
If you can’t answer the latter questions, then the only thing to choose is whether you want a lens that is good enough for general use or you are going to have to opt for a higher-priced mirrorless lens.
If you’re shopping for a lens as a portrait photographer, your main objective at this point is to decide which one to buy and whether it’s going to be as good as a prime lens.
If you’re buying an autofocus lens, then you’re going to want to make use of all of your available settings. This is the perfect opportunity to explore your image quality and the various options you currently have available. Once you’ve taken enough shots to determine your ideal settings (a number that will be different for each lens), then you’ve got another decision to make.
If you’re buying a prime lens, then you’re going to need to consider what type of photography you’re intending on shooting. You’ll want to pick the focal range of your lens, especially if you’re getting a full frame lens. If you know that you plan on shooting portraits, then you should always go for a prime lens.
What lenses support manual aperture?
In order to understand why you can use an lens with an aperture that is wider than f/2.8, it helps to understand manual aperture, a type of camera exposure control.
Manual aperture works by having the sensor pick up on a light source (a red dot, for example) as the camera measures the amount of light hitting the sensor from the incoming light. This light may come from something like the sky, the sun, a flashlight, or even your smartphone – all of which are used to illuminate or illuminate a portion of the image on the sensor.
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