About OSS degrading image quality

Started Apr 29, 2013 | Questions thread
Mel Snyder
Mel Snyder Veteran Member • Posts: 4,088
Re: Physics 101 :)

You are correct.

But then there's the financial aspect. Zeiss lenses are barely affordable as it is. Unlike Sigma and Sony, they don't have the volume markets to absorb OSS development costs.

smallLebowski wrote:

Zeiss is right, but prefers to hide complete answer.

When you have IS in the lens - this means that there is a "floating" element at all times. Now, when you hold your camera in hands - that's a good thing. However, when you have your camera on tripod - then this floating element will do harm, due to that element will keep floating (very little of course - maybe micrometers or even nanometers) and essentially it will result in smudge pixels right?

What we need is parking system - if that floating element can be parked (fixed) when needed (basically on/off button) - then there should be no degradation in IQ.

Also, when you turn on/off in the menu (not on the actual lens) you may be just switching off software responsible for stabilisation, but floating element will continue to float in the lens. So, eventually it all depends if your lens has parking system for that floating element.

That's how I see it - I maybe wrong.

 Mel Snyder's gear list:Mel Snyder's gear list
Sony Alpha NEX-6 Sony Alpha a7 Sony E 16mm F2.8 Pancake Leica Summicron-M 50mm f/2 Sony E 55-210mm F4.5-6.3 OSS +12 more
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