What Makes A Good Camera Lens

What Makes for a Good SLR Lens?

I went to visit an former friend yesterday who was my chief inspiration to get into photography. It seems that he has been taking beautiful photos forever forever and went on to prove me his newest gift – a brand new Catechism lens – Ultra-Wide 16-35mm f/ii.eight.

Photo past mekis; ISO 200, f/3.ane, .6-second exposure.

I went on to try information technology and realize how skilful the lens was. Merely WHY was the lens so proficient? Later all – what makes a good lens good? People spend thousands of dollars on a practiced lens. Hither are a few reasons why it's so important.

one) Distortion

All lenses have some kind of distortion. This tends to be manifested nearly in ultra wide bending lenses, particularly at very wides angles. A good instance of this is one picture that I took in Venice. I had walked back as far as possible to fit the entire frame into the photo and had to employ the widest lens angle possible (14mm). You tin can run across the belfry on the left hand side appears to be leaning. Clearly, it is not like this (and you're going to have to believe me that it's straight), simply illustrates the lens distortion that exists.

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Amend quality lenses have less distortion through the utilise of a greater number of lens elements. Nikon has just released an excellent xiv-24mm ultra wide angle lens with very footling distortion. The lens has 11 lens elements and weighs a full 1kg. Clearly not a lens to have lightly.

While photograph manipulation software exists today that can right lens baloney, it is always better to capture the image as it is.

2) Speed

The camera lens is responsible for capturing and focusing light onto the photographic camera sensor. Better quality lenses tend to have a larger discontinuity, allowing more low-cal to pass through to the sensor. The aperture size is measured as an f-stop. Confusingly, the larger the maximum aperture of the lens, the smaller the f-terminate.

Faster lenses are fundamental to capturing sporting events and wildlife. They are besides very handy to have for low light photographs and let the photographer to rely less on the ISO ability of the camera.

three) Vignetting

Vignetting manifests at the border of a photograph as darker areas. This is because more calorie-free enters the center of the lens than the edges due to poor lens glass or construction quality.

4) Abnormality

There is chromatic abnormality and spherical aberration. Chromatic aberration is a type of distortion in which the lens fails to focus all colors to the same convergence point. This shows upward as a discolored edge to objects in a picture. Wiki has a great photographic case of Chromatic aberration and tin can be found here on Wikipedia.

Spherical abnormality is distortion acquired by the spherical lens shape and occurs when light hits near the border of the lens instead of the center resulting in some resolution and clarity issues. This occurs more than when the discontinuity of the lens is completely open.

In reality, well-nigh high quality lenses take a plethora of technologies built into them to reduce aberration through a number of means including lens coatings, advanced construction methods and floating elements.

5) Vibration Reduction

Many lenses have vibration reduction built into the lens. Vibration reduction helps to stabilize the lens through a hand held photograph allowing the photographer to take a articulate picture at a slower shutter speed than they ordinarily would have been able to. Ironically, vibration reduction on lenses must be turned off for use on a long exposure tripod photograph.

Lenses are to cameras as tires are to cars. It's bang-up to purchase a Ferrari, but put shoddy tires on it and the apprehensive Chevy will drive circles around it. In reality, most lenses that yous can purchase today (even basic ones) are consistently very skillful, but many times some extra investment into lenses volition yield even better results.

About the Author:
For more than musings on photography, visit the rantings and ravings blog (learnphotographyalberta.ca) at Learn Photography Alberta.

Source: https://www.picturecorrect.com/tips/what-makes-for-a-good-slr-lens/

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