Mirrorless- Continuing to Under Perform

Started Apr 11, 2013 | Discussions thread
ultimitsu
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Re: Mirrorless- Continuing to Under Perform
In reply to Bart Hickman, Apr 12, 2013

Bart Hickman wrote:

ultimitsu wrote:

For Sony, the problem is IQ. their made flange back distance too short to make the camera as compact as they can, now they are paying the price - they just cannot make lenses perform well wide open around the corners. Once people buy into the system and want decent glasses, they can find none except use an adapter and shoot MF lenses. Not everyone's cup of tea.

This doesn't make any sense to me.  The short flange distance simply allows lenses that benefit from it (eg., the very good 10-18) to take advantage of it.  I think it also lets the 16-50 shrink more when it's not actually in use.

Problem is they all take advantage of it and end up with crappy corner IQ.

The 55-210 obviously isn't suffering from the short flange distance either (if anything, it's sharpest at 55mm where the rear element is closest to the sensor.)

It is suffering from it.

This is Sony, check the border.

http://www.photozone.de/images/8Reviews/lenses/sony_55210_4563_nex/mtf.png

This is canon 55-250, half the price, longer reach, 1/3 a stop faster, and exactly the same physical size.

http://www.photozone.de/images/8Reviews/lenses/canon_55250_456is_50d/mtf.gif

See how bad sony is in the border compared to the cheap canon?

NOTE: Sony lens show higher resolution at centre, that is because the sony lens is tested on a 24mp NEX7 while Canon is tested on a 15mp 50D.

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