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Lens question
Feb 20, 2018 14:50:47   #
Foozer
 
What is it that makes a lens a "prime lens"?

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Feb 20, 2018 14:54:30   #
rwilson1942 Loc: Houston, TX
 
Prime is what lenses with a fixed focal length are called.
Non-zoom lenses.

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Feb 20, 2018 14:58:41   #
Mac Loc: Pittsburgh, Philadelphia now Hernando Co. Fl.
 
rwilson1942 wrote:
Prime is what lenses with a fixed focal length are called.
Non-zoom lenses.



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Feb 20, 2018 15:21:46   #
Foozer
 
Is there a good all around versatile prime lens?

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Feb 20, 2018 15:27:22   #
Mac Loc: Pittsburgh, Philadelphia now Hernando Co. Fl.
 
Foozer wrote:
Is there a good all around versatile prime lens?


50mm on a full frame camera, or equivalent.

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Feb 20, 2018 15:29:27   #
burkphoto Loc: High Point, NC
 
Foozer wrote:
What is it that makes a lens a "prime lens"?


Singularity of focal length.

Prime has at least two pages worth of definitions in the dictionary. It's usage is confusing and ambiguous sometimes.

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Feb 20, 2018 15:31:46   #
burkphoto Loc: High Point, NC
 
Foozer wrote:
Is there a good all around versatile prime lens?


Mac wrote:
50mm on a full frame camera.


25mm on Micro 4/3.

35mm on APS-C.

75mm on 6x4.5 cm film cameras.

80mm on 6x6 cm film cameras.

90mm on 6x7 cm film cameras...

All of these matches will yield approximately the same field of view.

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Feb 20, 2018 15:36:49   #
Mac Loc: Pittsburgh, Philadelphia now Hernando Co. Fl.
 
burkphoto wrote:
25mm on Micro 4/3.

35mm on APS-C.

75mm on 6x4.5 cm film cameras.

80mm on 6x6 cm film cameras.

90mm on 6x7 cm film cameras...

All of these matches will yield approximately the same field of view.


I should have added "or equivalent".

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Feb 20, 2018 15:45:28   #
mwsilvers Loc: Central New Jersey
 
Foozer wrote:
What is it that makes a lens a "prime lens"?


Prime lenses also tend to be faster lenses, meaning wider apertures which allow in more light. Not all primes are fast, but generally short focal length primes have maximum apertures ranging from f/1.2 to f/2.8.This allows you to take photographs in low light and still maintain a moderate shutter speed and reasonable ISO levels.

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Feb 20, 2018 16:10:12   #
burkphoto Loc: High Point, NC
 
mwsilvers wrote:
Prime lenses also tend to be faster lenses, meaning wider apertures which allow in more light. Not all primes are fast, but generally short focal length primes have maximum apertures ranging from f/1.2 to f/2.8.This allows you to take photographs in low light and still maintain a moderate shutter speed and reasonable ISO levels.


Another advantage is that with f/2.8 and faster lenses, many autofocus systems work faster and more accurately.

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Feb 20, 2018 17:21:27   #
DWU2 Loc: Phoenix Arizona area
 
Also, due to their large apertures, primes tend to produce photos with pleasing bokeh, meaning blurring of the background.

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Feb 20, 2018 19:11:42   #
HarryBinNC Loc: Blue Ridge Mtns, No.Carolina, USA
 
Foozer wrote:
Is there a good all around versatile prime lens?


A lot of photographers (I am one of them) prefer a "shorter" lens for an all-around prime - such as 35mm for "full Frame", 23 or 24mm for "crop" cameras, and 17 or 20mm on Micro-4/3rds.

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Feb 20, 2018 22:35:50   #
burkphoto Loc: High Point, NC
 
HarryBinNC wrote:
A lot of photographers (I am one of them) prefer a "shorter" lens for an all-around prime - such as 35mm for "full Frame", 23 or 24mm for "crop" cameras, and 17 or 20mm on Micro-4/3rds.



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Feb 21, 2018 00:20:51   #
mwsilvers Loc: Central New Jersey
 
burkphoto wrote:


My personal favorite is a 35mm f/2 on my crop sensor Canon.

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