10-08-2011, 11:16 PM
[quote name='wim' timestamp='1318110928' post='12230']
Furthermore, investing in a metal camera body may not necessarily be the best option either, due to the fact that temperature differences, as indicated in the article, may result in non-optimal conditions for lenses. If that can pose a problem with lenses, it also can with camera bodies. Best therefore would be to use a camera body made from a material with an extremely small temperature coëfficient, such as some of the "engineering plastics" used <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.[/quote]
I believe most decentering issues, low resolution problems etc are caused by poor mechanical assembly rather than temperature differences.
I do not know if current phase AF problems can be resolved by having the AF sensors on the imaging sensor itself. If it really works, then that's a far better solution than the silly AF micro-adjustment approach.
Furthermore, investing in a metal camera body may not necessarily be the best option either, due to the fact that temperature differences, as indicated in the article, may result in non-optimal conditions for lenses. If that can pose a problem with lenses, it also can with camera bodies. Best therefore would be to use a camera body made from a material with an extremely small temperature coëfficient, such as some of the "engineering plastics" used <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.[/quote]I believe most decentering issues, low resolution problems etc are caused by poor mechanical assembly rather than temperature differences.
I do not know if current phase AF problems can be resolved by having the AF sensors on the imaging sensor itself. If it really works, then that's a far better solution than the silly AF micro-adjustment approach.