09-13-2010, 09:42 AM
[quote name='wim' timestamp='1283000869' post='2278']
The big advantage of the focus confirmation chip is actually that it'll provide exif information to the camera (and to the raw and jpeg files IOW), which makes it a lot easier to identify when using all kinds of tools. I also understand that that way it'll work well with ETTL too.
[/quote]
Wim... the camera writes the EXIF information to the image files whether the adapter has a chip or not. The adapters don't have a coupling with the lenses to identify the fstop or the focal length anyway, so it's always constant unless it's a more complex/expensive programmable one. I think my Nikon EOS adapter is pre-programmed to always say 50mm f/2. This (the constant absolute focal length info) can even be a problem when having auto ISO in Aperture Priority because auto ISO works in relation to the focal length.
Also I'm pretty sure ETTL doesn't need a chip either. Canon is very nice in this regard <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />
GTW
The big advantage of the focus confirmation chip is actually that it'll provide exif information to the camera (and to the raw and jpeg files IOW), which makes it a lot easier to identify when using all kinds of tools. I also understand that that way it'll work well with ETTL too.
[/quote]
Wim... the camera writes the EXIF information to the image files whether the adapter has a chip or not. The adapters don't have a coupling with the lenses to identify the fstop or the focal length anyway, so it's always constant unless it's a more complex/expensive programmable one. I think my Nikon EOS adapter is pre-programmed to always say 50mm f/2. This (the constant absolute focal length info) can even be a problem when having auto ISO in Aperture Priority because auto ISO works in relation to the focal length.
Also I'm pretty sure ETTL doesn't need a chip either. Canon is very nice in this regard <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='
' />GTW