Canon 50mm f/1.8 lens - sharpness


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Aug 10, 2009
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Simei
#1
Hi all

I'm new to DSLRs. Wanted to check if the sharpness of the the Canon 50mm f/1.8 lens is only at the autofocus points (using 1000D) which lights up as red in the viewfinder? Realise that the surrounding areas are blurred. Is this the way it should be ? Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).

Thanks in advance. cheers
 

Rashkae

Senior Member
Nov 28, 2005
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#2
It depends on the aperture that you are using. I suggest you read a bit more about depth of field. Your manual will also cover this topic in the "aperture" section.

Try stopping down the aperture to 2.8, 4, 8 and 16 and you'll see the correlation.
 

Rashkae

Senior Member
Nov 28, 2005
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#3
Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).
Right here in the Newbies Corner is a sticky called "forum-related FAQs for newbies". Read there how to post images here.
 

Snoweagle

Senior Member
Jan 26, 2005
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Pasir Ris, Singapore
#4
Hi all

I'm new to DSLRs. Wanted to check if the sharpness of the the Canon 50mm f/1.8 lens is only at the autofocus points (using 1000D) which lights up as red in the viewfinder? Realise that the surrounding areas are blurred. Is this the way it should be ? Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).

Thanks in advance. cheers
The amount of background blur or 'bokeh' depends on aperture used and distance between u and your subject, and your subject to the background.

As of now u only have 3 posts and there are certain criteria for pictures posting, so it's not possible for u yet.
 

Rashkae

Senior Member
Nov 28, 2005
19,105
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#5
As of now u only have 3 posts and there are certain criteria for pictures posting, so it's not possible for u yet.
Oh? LOL, forgot the limitations
 

May 11, 2009
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#6
Well, you could post a link to the photo instead and provide the exif as well so people could help more. :)
 

MintChoco

New Member
Nov 7, 2009
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#7
I could post images on my second ever post on the forums o_O

Will be interested to see the photos. 50mm f1.8 is such a gorgeous lens.
 

May 5, 2009
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#8
The amount of background blur or 'bokeh' depends on aperture used and distance between u and your subject, and your subject to the background.
"bokeh" is the "quality" of background blur, not amount. :)
 

giantcanopy

Senior Member
Feb 11, 2007
6,232
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#10
Hi all

I'm new to DSLRs. Wanted to check if the sharpness of the the Canon 50mm f/1.8 lens is only at the autofocus points (using 1000D) which lights up as red in the viewfinder? Realise that the surrounding areas are blurred. Is this the way it should be ? Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).

Thanks in advance. cheers
U will always be viewing at maximal aperture of 1.8 in this instance thru the viewfinder except when u depress the DoF preview button in the event u stop down the aperture and u would like to see how the depth of field appears

The stop down in aperture is automatic when u snap the shutter release. the picture will translate the aperture u set.

* but if u r complaining about the razor thin dof in the pics u got save the focussed point, then it is because of a larger aperture.

happy shooting!

ryan
 

Last edited:
May 5, 2009
480
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#12
Aug 10, 2009
158
0
16
Simei
#17
guys, thanks for all your help. Based on your feedback, realised that I was too close to the subject, took more pictures and understand it better now. The lens is sharp and like the picture quality....happy to register the warranty now. cheers.
 

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