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I was told any good lens can out-resolve any sensor...



 
 
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  #1  
Old March 17th 13, 02:45 PM posted to rec.photo.digital.slr-systems
Wolfgang Weisselberg
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Posts: 5,285
Default I was told any good lens can out-resolve any sensor...

RichA wrote:
But has anyone on a D800 seen an excellent lens beat a good lens when
it comes to resolution, in the centre, at f/8.0?


Has anyone seen an f/1.4 lens beat an f/4 lens at f/2?

-Wolfgang
  #2  
Old March 19th 13, 11:15 AM posted to rec.photo.digital.slr-systems
Neil Ellwood
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Posts: 493
Default I was told any good lens can out-resolve any sensor...

On Sun, 17 Mar 2013 14:45:31 +0100, Wolfgang Weisselberg wrote:

RichA wrote:
But has anyone on a D800 seen an excellent lens beat a good lens when
it comes to resolution, in the centre, at f/8.0?


Has anyone seen an f/1.4 lens beat an f/4 lens at f/2?

-Wolfgang


That's an old chestnut - they all would. (How do you stop UP an f4 lens?)



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Neil
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Remove ‘l’ to get address.
  #3  
Old March 21st 13, 01:48 PM posted to rec.photo.digital.slr-systems
Wolfgang Weisselberg
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Posts: 5,285
Default I was told any good lens can out-resolve any sensor...

Neil Ellwood wrote:
On Sun, 17 Mar 2013 14:45:31 +0100, Wolfgang Weisselberg wrote:
RichA wrote:


But has anyone on a D800 seen an excellent lens beat a good lens when
it comes to resolution, in the centre, at f/8.0?


Has anyone seen an f/1.4 lens beat an f/4 lens at f/2?


That's an old chestnut - they all would.


The even older chestnut is that f/8 in the centre is where
even less than stellar lenses are usually very good.

Oh, and that many people don't want to use only f/8 and the
centre on a D800.


(How do you stop UP an f4 lens?)


I don't know what you'd do it, *I*'d use a focal reducer.

-Wolfgang
  #4  
Old March 21st 13, 03:03 PM posted to rec.photo.digital.slr-systems
Neil Ellwood
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Posts: 493
Default I was told any good lens can out-resolve any sensor...

On Thu, 21 Mar 2013 13:48:01 +0100, Wolfgang Weisselberg wrote:

Neil Ellwood wrote:
On Sun, 17 Mar 2013 14:45:31 +0100, Wolfgang Weisselberg wrote:
RichA wrote:


But has anyone on a D800 seen an excellent lens beat a good lens when
it comes to resolution, in the centre, at f/8.0?


Has anyone seen an f/1.4 lens beat an f/4 lens at f/2?


That's an old chestnut - they all would.


The even older chestnut is that f/8 in the centre is where even less
than stellar lenses are usually very good.

Oh, and that many people don't want to use only f/8 and the centre on a
D800.


(How do you stop UP an f4 lens?)


I don't know what you'd do it, *I*'d use a focal reducer.

-Wolfgang


With the only focal reducer I've seen it would still have been an f4.



--
Neil
Reverse ‘a’ and ‘r’
Remove ‘l’ to get address.
  #5  
Old March 23rd 13, 12:30 AM posted to rec.photo.digital.slr-systems
Wolfgang Weisselberg
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Posts: 5,285
Default I was told any good lens can out-resolve any sensor...

Neil Ellwood wrote:
On Thu, 21 Mar 2013 13:48:01 +0100, Wolfgang Weisselberg wrote:
Neil Ellwood wrote:
On Sun, 17 Mar 2013 14:45:31 +0100, Wolfgang Weisselberg wrote:
RichA wrote:


But has anyone on a D800 seen an excellent lens beat a good lens when
it comes to resolution, in the centre, at f/8.0?


Has anyone seen an f/1.4 lens beat an f/4 lens at f/2?


That's an old chestnut - they all would.


The even older chestnut is that f/8 in the centre is where even less
than stellar lenses are usually very good.


Oh, and that many people don't want to use only f/8 and the centre on a
D800.


(How do you stop UP an f4 lens?)


I don't know what you'd do it, *I*'d use a focal reducer.


With the only focal reducer I've seen it would still have been an f4.


Then it isn't a focal reducer. A focal reducer is just the
opposite of a teleconverter/extender: reduces the image circle,
reduces the focal length, increases the light per area where
the image circle is.

-Wolfgang
 




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