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  1. Galleries
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  3. Still Life
  4. » Test Canon 7D ISO6400

 
Test Canon 7D ISO6400...

Temp

View gallery (7 photos)

Test Canon 7D ISO6400 sent on August 26, 2012 (16:55) by Wolf3d. 7 comments, 909 views.

con Sigma 2x EX DG at 70mm, 1/90 f/5.6, ISO 6400, tripod.

Test effettuato per verificare la diversa risposta degli alti (o bassi o boh...) in differenti condizioni di luce. Post elaborazione azzerata.



View High Resolution 7.9 MP  



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avatarsenior
sent on August 26, 2012 (16:56) | This comment has been automatically translated (show/hide original)

Test for discussion: www.juzaphoto.com/galleria.php?srt=new&l=it&show=&cat=sing

avatarsupporter
sent on June 10, 2013 (22:37) | This comment has been automatically translated (show/hide original)

is the cut-out 100%?

avatarsenior
sent on June 12, 2013 (16:00) | This comment has been automatically translated (show/hide original)

The HD version yes

avatarsupporter
sent on June 13, 2013 (0:38) | This comment has been automatically translated (show/hide original)

I have a 7d with the same canvas and in a few days the same extender ... I wanted to see the surrender of everything together .... thanks

avatarsenior
sent on June 15, 2013 (11:39) | This comment has been automatically translated (show/hide original)

The yield is excellent from the optical point of view, there is chromatic aberration at the edges, despite the crop factor, but it is easily removed.
The problem is the autofocus, which already does not excel without focal Doubler, you'll use practically only manual :)

avatarsupporter
sent on June 16, 2013 (0:13) | This comment has been automatically translated (show/hide original)

actually it is true .. if it is very out of focus can not lock to ... Another problem that finding is that the machine makes me wanting to go down to 2.8 and I also calculates the 2-ev it should take automatically, I have to use in av putting the right diaphragm and tell him to stay - 2 ev with the wheel to esp. right? rather cumbersome!

avatarsenior
sent on June 16, 2013 (16:20) | This comment has been automatically translated (show/hide original)

Yes, it is so except in live view, but I would have to "underexpose" 1-stop and not two as you say. Apparently the couple is not compatible factory, in fact everything is always seen with a maximum aperture of f/2.8 while it is 5.6.
Apart from these flaws I'm not regretted it at all, nor the Tamron or Sigma doubler, their performance is excellent and thankfully I do not often have to catch a flight to the situation.
Of course, in those cases, ours is a choice that does not pay.


RCE Foto

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