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1.4 vs. 1.8. Is it worth the extra cost?
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May 1, 2014 18:49:28   #
davidheald1942 Loc: Mars (the planet)
 
Actually you use the maximum aperture every time you look through the viewfinder. I'm thinking you are talking about an slr. The extra light through the viewfinder makes a lot of difference while composing the shot. JMHP.

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May 1, 2014 18:50:42   #
davidheald1942 Loc: Mars (the planet)
 
error.

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May 1, 2014 19:26:27   #
LyneLa Mesa
 
I think the answer is obvious, 1.4. But remember lower f number is wider aperture. I am no expert here, just trying to explain my understanding.

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May 1, 2014 20:56:25   #
Nikonian72 Loc: Long Beach CA
 
LyneLa Mesa wrote:
Yes, always. Lower f number equals better bokeh and greater flexibility in shutter speed. It is always better.
You did not answer the two questions.
Which do you consider a "lower f number":
f/1.8 or f/1.4?
f/2 or f/16?
LyneLa Mesa wrote:
I think the answer is obvious, 1.4. But remember lower f number is wider aperture. I am no expert here, just trying to explain my understanding.
Actually, no. the better example is the question that you did not answer: "f/2 or f/16". Aperture f/2 allows three times as much light as f/16, and will have a much narrower Depth of Field than f/16. Aperture f/2 will have more indistinct background highlights (bokeh) than f/16. Aperture numbers should always be written as a fraction, because they are. 1/2 is much larger than 1/16. Aperture f/2 is much larger than aperture f/16, and aperture f/1.8 is slightly larger than aperture f/1.4.

Read more here:
FAQ: What is the significance of f/stop numbers?
http://www.uglyhedgehog.com/t-26508-1.html

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May 1, 2014 22:29:39   #
davidheald1942 Loc: Mars (the planet)
 
hi nikonion. I flunked every test I ever had in high school if/when there were square root problems involved.

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May 2, 2014 00:38:19   #
Nikonian72 Loc: Long Beach CA
 
davidheald1942 wrote:
hi nikonion. I flunked every test I ever had in high school if/when there were square root problems involved.
No one has mentioned square root, which is a geometry term, not a photographic term.

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