[quote name='genotypewriter' timestamp='1284370924' post='2690']
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='B)' />
I do realize that the camera will always write exif information to the file saved. What I meant was that a focus confirm adapter can be programmed with the lens information, and even though it doesn't save the actual aperture used, unless you keep on reprogramming it for each shot (which apparently some people do with the latest version of the chip, V. 5), at least the basic lens info like name, brand, model and max. f-stop is listed in the exif information that way. To me that alone is worth the chip, basically because it means I don't have to remember with which lens the shots were taken. That's very useful information when you own more than 1 non-Canon EF or alternative lens <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />, and for processing the picture.
Regarding ETTL: I had been told otherwise, so it is nice to know it isn't required. Thanks for that!
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....