[Brightcolours]

[quote name='Klaus' timestamp='1313693305' post='10819']

The CA procedure works fine within its parameters. Technically it is slightly polluted by LoCAs but even so it is meaningless because a color fringing is a color fringing regardless of its origin. You may argue about the naming of the "combined CAs".



PF is another issue as mentioned but not measurable. It is probably the issue that you're pointing to here.

[/quote]

Not really... it is clear lateral CA, of the red/blue-green type. It is at least 3 pixels wide (and that is why I say the testing procedure/software seems a but unreliable), and has nothing to do with LoCAs nor purple fringing...



Look at the fifth image for instance, it is all over the place but most clear on the left top, the mountain/sky edge where depending on angle of the edge angle we either see red or green. And the snow patches, red on one side, green on the other. Typical LaCA where some colours get bent more than others through the optics, resulting in some colours having larger projections than others.

[Tiz]

"I'm slightly wondering whether the comparatively moderate border quality is a side effect of the sensor. e.g. The NEX5 has its fair share of problems with compact ultra-wides as well "



I believe some people say that the short flange back distance is the problem: http://www.talknex.com/showthread.php?7-Interesting-discussion-on-NEX-Flange-back-issue-or-not



At least, this would explain why the border of the NEX are even worse than mFT borders.

[Klaus]

[quote name='Brightcolours' timestamp='1313695829' post='10821']

Not really... it is clear lateral CA, of the red/blue-green type. It is at least 3 pixels wide (and that is why I say the testing procedure/software seems a but unreliable), and has nothing to do with LoCAs nor purple fringing...



Look at the fifth image for instance, it is all over the place but most clear on the left top, the mountain/sky edge where depending on angle of the edge angle we either see red or green. And the snow patches, red on one side, green on the other. Typical LaCA where some colours get bent more than others through the optics, resulting in some colours having larger projections than others.

[/quote]



I will have a look regarding the CAs in the "corners". The effect amplies more towards the extremes, of course.

This will have to wait till next week though. Some scuba diving in Norway is waiting for me. :-)

[Brightcolours]

[quote name='Klaus' timestamp='1313697530' post='10823']

I will have a look regarding the CAs in the "corners". The effect amplies more towards the extremes, of course.

This will have to wait till next week though. Some scuba diving in Norway is waiting for me. :-)

[/quote]

Hehe wow, how awful for you <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />

[Guest]

Ack; sort of like a suspense novel; keep us hanging <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' />





[quote name='Klaus' timestamp='1313697530' post='10823']

I will have a look regarding the CAs in the "corners". The effect amplies more towards the extremes, of course.

This will have to wait till next week though. Some scuba diving in Norway is waiting for me. :-)

[/quote]

[Yakim]

[quote name='Sammy' timestamp='1313682713' post='10814']

From a testing perspective a valid point. From a more general perspective the adapter is simply costly while the line-up of native E-mount lenses is still poor.[/quote]



Not only that but it prevents you from having any kind of stabilization. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/sad.gif' class='bbc_emoticon' alt='' />

[Guest]

[quote name='Yakim' timestamp='1313764204' post='10836']

Not only that but it prevents you from having any kind of stabilization.[/quote]



Good point, but couldn´t the NEX-7 theoretically provide a sensor-shift based stabilization?

[Yakim]

I have no idea but theory aside, in practice it does not have it. BTW, this is another reason for me to go with the E-P3 rather than NEX 7.

[boren]

[quote name='Yakim' timestamp='1313764204' post='10836']

Not only that but it prevents you from having any kind of stabilization. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/sad.gif' class='bbc_emoticon' alt='' />[/quote]



Why? You just need to attach a stabilized A-mount lens (Sigma makes a few of those).

this is another reason for me to go with the E-P3 rather than NEX 7.

I can think of reasons to choose a PEN over a NEX, but IS shouldn't be one of them. Whatever you gain in IS you loose in ISO, and except for mostly-theoretical situations, clean high-ISO is the more useful option. Preventing blur using clean high-ISO is more beneficial than using a lesser sensor coupled with IS. The reason is that high-ISO also helps freezing subject motion blur, while IS only helps against hand-shake. The only cameras that offer both are from Sony (not the NEX though) and Pentax.

[Yakim]

[quote name='boren' timestamp='1313824682' post='10848']

Why? You just need to attach a stabilized A-mount lens (Sigma makes a few of those).[/quote]



You're right. I never knew that. That's very strange. According to B&H there are indeed several OS lenses for Sony. I wonder how it works.



[quote name='boren' timestamp='1313824682' post='10848']

I can think of reasons to choose a PEN over a NEX, but IS shouldn't be one of them. Whatever you gain in IS you loose in ISO, and except for mostly-theoretical situations, clean high-ISO is the more useful option. Preventing blur using clean high-ISO is more beneficial than using a lesser sensor coupled with IS. The reason is that high-ISO also helps freezing subject motion blur, while IS only helps against hand-shake. The only cameras that offer both are from Sony (not the NEX though) and Pentax.[/quote]



The main reasons (for me) are system ones i.e. size and weight (of camera and lens attached) and abundance of AF lenses. IBIS is only the icing on the cake. Yes, APS-C has better high ISO than MFT but IMHO the differences are rather small (about one stop) and are not enough to compensate for the other factors. If anything, it's the built-in high-res EVF of the NEX7 that tempts me much more than the better high ISO.



Last, one must not forget that you sometimes do not want to freeze the action [url="http://www.fredmiranda.com/forum/topic/809532/0#7482263"]but vice versa[/url].