12-06-2011, 11:31 AM
[quote name='PuxaVida' timestamp='1323167835' post='13474']
Nice article, thanks for sharing... I would like to use this as an opportunity to be informed about a specific issue... Does somebody have any idea about the relation of these statements in the article and the Nex-7 corner smearing / color shift issue? Should one be very picky when it comes to use an UWA on Nex-7? It stuck in my mind after checking the link in [url="http://forum.photozone.de/index.php?/topic/1462-sony-nex-7-non-dedicated-wide-angles/"]this post[/url]...
Serkan
[/quote]
Yes, one should be <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.
There are really two issies here, one being the AA-filter, and the other being the relative photosite (or sensel) well depth. With larger incident angles the sensels at the edge of a sensor will more and more lie in the shadow of its own little well edges, and this effect is stronger the smaller a sensel is. This may also cause colour shifts, as the sensel edge may well refract light itself - after all it is made of crystalline glass (silicon <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />).
From tests I have seen with e.g. the Heliar 12 F/5.6, it is clear that the NEX-7 suffers more from this than, e.g. the Nex-5n. And we all know that there are problems with this regarding, e.g., the Leica M9. The smaller the sensels, and the larger the sensor, the stronger this effect will be.
Kind regards, Wim
Nice article, thanks for sharing... I would like to use this as an opportunity to be informed about a specific issue... Does somebody have any idea about the relation of these statements in the article and the Nex-7 corner smearing / color shift issue? Should one be very picky when it comes to use an UWA on Nex-7? It stuck in my mind after checking the link in [url="http://forum.photozone.de/index.php?/topic/1462-sony-nex-7-non-dedicated-wide-angles/"]this post[/url]...
Serkan
[/quote]
Yes, one should be <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.There are really two issies here, one being the AA-filter, and the other being the relative photosite (or sensel) well depth. With larger incident angles the sensels at the edge of a sensor will more and more lie in the shadow of its own little well edges, and this effect is stronger the smaller a sensel is. This may also cause colour shifts, as the sensel edge may well refract light itself - after all it is made of crystalline glass (silicon <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />).From tests I have seen with e.g. the Heliar 12 F/5.6, it is clear that the NEX-7 suffers more from this than, e.g. the Nex-5n. And we all know that there are problems with this regarding, e.g., the Leica M9. The smaller the sensels, and the larger the sensor, the stronger this effect will be.
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 ....