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next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL
#19
[quote name='Brightcolours' timestamp='1300638149' post='6973']

Photozone has a way of measuring a bit past the nyquist limit. It does not really matter, though, how photozone gets its maximum achievable value.. as long as they do it the same for each camera.



Th point I made remains the same: you can compare lenses from different bodies, just by looking at the graph itself and ignoring the values. This will give a good enough impression to know how a lens performs.

[/quote]



You canot go beyond the Nyquest frequency. To avoid a "danger" that a given lens could deliver higher than the Nyquest frequency resolution (in the case of image sensor this means to deliver more pixels of resolution then is the number of sensor pixels in that direction), there is an AA filter in front of the sensor. And those 2350 and 2700 numbers represent lower resolution than what corresponds to the Nyquest frequency of 10 and 16 Mp sensors respectively. I woud say that they somehow represent the maximum resolution, which a given sensor INCLUDING the AA filter can deliver. I am just curious, how you can measure such resolution. Unless you use a "perfect" lens.
  


Messages In This Thread
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by AlbertoM - 03-15-2011, 06:19 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by flektogon - 03-17-2011, 02:21 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by flektogon - 03-17-2011, 09:56 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by flektogon - 03-18-2011, 12:27 AM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by flektogon - 03-20-2011, 01:20 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by flektogon - 03-20-2011, 06:46 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by flektogon - 03-20-2011, 08:37 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by arvydas - 03-20-2011, 10:45 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 03-22-2011, 06:07 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 03-22-2011, 08:17 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 03-22-2011, 09:41 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 03-22-2011, 09:45 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by froeschle - 04-20-2011, 01:30 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 04-20-2011, 02:09 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 04-20-2011, 05:21 PM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 04-22-2011, 06:10 AM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 04-22-2011, 06:47 AM
next PZ lens test report: Pentax SMC DA 35mm f/2.4 AL - by Christos - 04-22-2011, 07:31 AM

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