Aperture sweet spot on lens?


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happyfrog

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Feb 4, 2009
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#1
What is the sweet spot on different apertures for sharpest image?

I know different lenses have different sweet spots.. but in general, what is your magic number?

f/8?

f/11?

f/16?
 

Rashkae

Senior Member
Nov 28, 2005
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#2
Usually f/5.6 and f/11 are the sweet spots.

But it depends on the lens. I have soe that are sharp from f/1.8 onwards.
 

redname

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Oct 8, 2009
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#3
yap, i got a 50mm F1.4 tht is the sharpest at 3.5
 

rendition

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Jan 26, 2008
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#5
Generally, a stop or two down from max aperture of lens. If you stop down too much till like f/16, you're most likely to get less sharper details due to diffraction.

There's a table on this site that shows diffraction value of different Canon bodies.
 

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Shin Howard

Senior Member
Feb 18, 2008
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#6
Center sharpness usually drop quite a bit for very small aperture settings.

I'll prefer to use 1 stop down the max aperture for zoom lens and 2 stops for prime lens.
 

catchlights

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Sep 27, 2004
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#7
sweet spot is referring to optimum resolution power, corner to corner sharpness, etc among the aperture value.... depends on lens design, usually two stop down from wide open.

so if a lens is sharp at wide open does not imply the sweet spot is at wide open.
 

Blur Shadow

Senior Member
Sep 17, 2005
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#9
Go check out the MTR of each lesn if you want.
 

night86mare

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Aug 25, 2006
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#10
What is the sweet spot on different apertures for sharpest image?

I know different lenses have different sweet spots.. but in general, what is your magic number?

f/8?

f/11?

f/16?
depends la..

frankly speaking, AROUND the sweet spot is good enough, beyond that it's just peanuts.
 

M

maxtheevil

Guest
#11
note 1

2 stops below your max aperture for that zoom distance / prime lens focal length

to

F8


note 2

(generally, f5.6 to f8 is the sharp and safe aperture)


i wrote note 2, just in case there are people who don't understand note 1.


who ?


people like me, when i was a newbie, telling me note 1, would mean another 7 questions.

:)
 

M

maxtheevil

Guest
#13
go to kenrockwell.com, and read his how-to guides, it's very straight-forward and useful info for me on how to optimise the performance of my lens.

his articles aided me, hope it does the same for the readers here.
 

M

maxtheevil

Guest
#15
keep the conversation clean, i think there's girls on these forum.

let's pretend to be civil, so that we don't turn off

1. girls

2. international crowd.

most of us are the children of coolies, let's pretend that we have moved on from that era and attained some civil graces.
 

giantcanopy

Senior Member
Feb 11, 2007
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#16
plenty of input on the sweet spot issue. i would say if ur lens is 50mmf1.8 and the situation necessitates using 1.8 then use lor. if it needs f11 for more dof then use it. other than the concept of sweet spot, there is alot about using different aperture for different photographic purposes too.

ryan
 

Snoweagle

Senior Member
Jan 26, 2005
14,002
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Pasir Ris, Singapore
#17
keep the conversation clean, i think there's girls on these forum.

let's pretend to be civil, so that we don't turn off

1. girls

2. international crowd.

most of us are the children of coolies, let's pretend that we have moved on from that era and attained some civil graces.
What's so 'unclean' about the conversation here?? :dunno:
 

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