Quote Originally Posted by DavidEccleston
Sure FF tends to get less noise, but that's due to more photons hitting
the a single pixel over the same time, as the pixels are larger. If a
crop camera had the same sized pixels on the sensor as the full frame,
the noise would be the same (though your resolution would be low!), so
the crop factor doesn't have a directly correlation to pixel noise

Nope, you are not right. Here was discussed several times about sensor size and what depends on it.


And clemmb shows for you good camera comparison.


FullFrame sensor will have less noise not due to larger pixels, but due to larger surface of sensor = larger sensor, which can collect larger amount of light.


Imagine, you have:
  1. 10 buckets with 10 <span class="HW"]litre capacity each<span class="HW"]
  2. <span class="HW"]25 buckets with 5 <span class="HW"]litre capacity each.



And you place each type of bukets one nearby others. You have 2 areas with different size of buckets and of course different size of covered area. When the rain is starting, think, which area of buckets can produce larger amount of watter?


I think you will do the math []


<span style="color: #ff0000;"]Edit: <span style="color: #ff0000;"]and it is due to overal larger capacity of buckets (pixels) = larger sensor.





Quote Originally Posted by DavidEccleston
It's the DOF increase, due to changed camera to subject distance
required to get the same framing, that makes people talk about the crop
factor applying to aperture, as they are directly linked.

So tell me, when here http://www.dofmaster.com/dofjs.html i select:
  • 5D, 135 mm, F/2 and distance 5 meters, and i get 16 cm of DoF
  • and with 7D, i select 85 mm (for same framing), F/2 and 5 meters distance, i get 26 cm of DoF.



Which number (Depth of Field) is smaller (more narrow): 16 cm or 26 cm ? []