Newsgroup: it.arti.fotografia.digitale
Titolo: Test autofocus 300D e un paio di lenti...

http://master1977.myftp.org/Test/Focus_Test1.jpg
   -->  55 mm, F5.6
http://master1977.myftp.org/Test/Focus_Test2.jpg
   -->  18 mm, F3.5
http://master1977.myftp.org/Test/Focus_Test3.jpg
   -->  50 mm, F1.8
http://master1977.myftp.org/Test/Focus_Test4.jpg
   -->  50 mm, F1.8
Che ve ne pare ? La seconda mi pare mostruosa...
Forse non ho capito bene come fare il test. Ho scattato le prime due con 
l'obiettivo del kit (18-55) e le ultime due con un 50mm F1.8 mkII. 

>Forse non ho capito bene come fare il test.
riporto quanto specificato nel file pdf contenente anche il modulo che
hai stampato e fotografato.
considera che è stato scritto per la Nikon D70 e quindi di tanto in
tanto fa riferimento ad impostazioni della stessa che devi ritrovare
con altro mezzo sulla 300D.
Buona lettura!
Dan.
"
There are many factors that can lead to erroneous and misleading
results when doing this test.
Make sure you read the instructions carefully and follow them in
detail.
1. Print out this document.
2. Place the test chart absolutely flat on a level surface. There must
be no visible lumps or bumps in the chart. It needs to be flat.
3. Aim your camera at 45 degrees to the chart.
4. Focus on the centre of the focus line in the focus box at the
centre of the chart.
5. When shooting your test pics, you need to be close enough that
the test chart somewhat more than fills the frame. Get nice and close.
6. Ensure that you are not so close that the auto focus system is
unable to focus due to you being at the limit of the range of focus of
your lens.
You can check this by moving your camera closer and closer to the
image and testing when it is no longer able to focus and then making
sure that you are set up at least a few inches back from this point.
7. Set your camera to aperture priority mode (“A” on the rotary dial)
and adjust the aperture setting as wide as it will go (lowest f-stop
number) for the lens you have on the camera. This gives you the
shallowest depth of field, which is crucial to this test.
8. Set the Autofocus system to “AF-S” mode (CSM Menu item 2).
9. Set the AF-area mode to “Single area” (CSM Menu item 3).
10. Ensure that you have the centre focus area selected. If not then
adjust this using the multi selector button (up/down/left/right). The
focus selector lock switch (just below the multi selector button) must
be unlocked in order to change/select the appropriate focus area.
11. If you have extra lighting available, use it to light up the test
chart. The chart must be lit more or less from the front. I like to
use a bright constant light source, like a halogen flood or similar,
but the flash seems to work just fine too. If you’re going to depend
on the flash then make sure there’s enough ambient light for the auto
focus system to work reliably.
12. Metering mode and centre weighting is not critical. As long as
you’re getting a well lit, bright image out of the camera then it’s
fine.
13. First shoot an initial pic and have a good look at it before you
go further. Make sure the test chart is bright and white. Adjust your
white balance and shutter speed to get this right. Use more light
and/or the flash if necessary.
14. Use either the remote control (if you have one) or the camera’s
self timer to trigger the shutter release in order to avoid any camera
shake.
15. Now go ahead and shoot your test pics.
"