You Guys Know Don't You...

Started Nov 23, 2013 | Discussions thread
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Ray Maines
Veteran MemberPosts: 3,576Gear list
You Guys Know Don't You...
Nov 23, 2013

You guys know don't you that a "faster" lens isn't necessarily a better lens?

"Faster" means a wider aperture so that under the same lighting conditions the camera can choose a faster shutter speed. This causes a corresponding decrease in depth of field, and an increase in focusing difficulty.

That in itself can reduce the quality of your pictures but even if you nail the focus every single time you may still not be happy with your new F/1.4 lens.

Image Quality is different than wide aperture. We still have to talk about distortion, vignetting, resolution and color.

Wider apertures mean bigger, heavier, and more expensive lenses. This is not always a bad thing, but it's rarely a good thing.

Answer honestly, how many times do you take pictures in really dim light? And when the light is dim, ask yourself if maybe a higher ISO setting or - gasp! - a flash unit might be a better answer?

A couple more random thoughts:

"Fast" lenses are always primes, and by definition are not versatile. F/2.8 really isn't fast enough to really be be considered "fast". A flash strobe isn't as obnoxious as you might at first think and works with every lens you will ever own. Depth of field is a bigger deal than most people think.

And as always, please don't tell me what you see at 500% on a 32" monitor. Make a print and believe your eyes.

Thank you for your indulgence. Peace.

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 Ray Maines's gear list:Ray Maines's gear list
Sony SLT-A77 Sony Alpha NEX-6 Sony DT 16-80mm F3.5-4.5 ZA Carl Zeiss Vario-Sonnar T* Sony 70-300mm F4.5-5.6 G SSM Tamron SP AF 90mm F/2.8 Di Macro +11 more
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