Image quality (1 Viewer)

Geoff Pain

Rural Member

• Sep 20, 2008

• #1

I have a Canon EF400mm F5.6L USM lens.A bit ago my camera and lens fell on the floor out of my bag at a height of about 1.5 foot.Compared to other pictures of people using the same lens mine do not seem as sharp and wonder if the drop has knocked something out a bit.Below is a test shot taken with the lens mounted on a tripod,using a Canon 450D.The settings were ISO 400,shutter speed 1/1600 @ 5.6f.What do you think is something amiss or is it me?

 

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IanF

Moderator

• Sep 20, 2008

• #2

Must admit Geoff that everything looks spot on in the test photo. Plenty of detail there.

Mines been knocked and dropped a few times now and it's still working fine.

 

Roy C

Occasional bird snapper

• Sep 21, 2008

• #3

Looks spot-on to me Geoff. When comparing other peoples shots there are a lot of things that can influence the picture quality/sharpness apart from the lens itself. And remember that most people only post their better shots so you do not see some of the inevitable cr#p shots that everyone takes.

 

Overread

Hunting birds with a canon

• Sep 21, 2008

• #4

also at websize many after resizing a shot will use sharpen the shot again - since resizing will reduce sharpness to a degree - of course on a smaller photo a higher degree of sharpness is possible.
I have many shots which fullsize are soft - but scaled down can be made acceptably sharp for the web

 

John P

Usually on a different wavelength

• Sep 21, 2008

• #5

Geoff Pain said:

What do you think is something amiss or is it me?

Click to expand...

There doesn't appear to be anything that's actually a pure white in picture.

The whole background looks a bit grey.

 

Roy C

Occasional bird snapper

• Sep 21, 2008

• #6

John P said:

There doesn't appear to be anything that's actually a pure white in picture.

The whole background looks a bit grey.

Click to expand...

Don't think this would be to do with the sharpness of the lens John - if there is supposed to be white in the pic then this is down to the white balance and could easily be corrected in P&P (esp. if shot in raw)

 

Geoff Pain

Rural Member

• Sep 21, 2008

• #7

Thanks for the feedback guys,will have to try harder.

 

John P

Usually on a different wavelength

• Sep 21, 2008

• #8

Roy C said:

Don't think this would be to do with the sharpness of the lens John - if there is supposed to be white in the pic then this is down to the white balance and could easily be corrected in P&P (esp. if shot in raw)

Click to expand...

No, but my thinking was that a purer white would provide more contrast and make the pic look a bit sharper.

 

Last edited: Sep 21, 2008

Roy C

Occasional bird snapper

• Sep 21, 2008

• #9

John P said:

No, but my thinking was that a purer white would provide more contrast and maybe the pic would look sharper.

Click to expand...

Could be John but I suspect that the target is 18% Grey which makes correct exposure easier (could well be wrong - I usually am o ) as stated earlier the sharpness looks fine to me.

 

GYRob

Well-known member

• Sep 21, 2008

• #10

looks sharp to me ,
Rob.

 

JohnZ

Well-known member

• Sep 21, 2008

• #11

And me.

 

Ragna

Well-known member

• Sep 21, 2008

• #12

Looks sharp to me as well.