Mirrorless- Continuing to Under Perform

Started Apr 11, 2013 | Discussions thread
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Bart Hickman
Veteran MemberPosts: 7,256Gear list
Re: Why should MFT lenses be cheaper than FF lenses? Smaller, yes...
In reply to Mike CH, Apr 12, 2013

Mike CH wrote:

ultimitsu wrote:

Problem with mirrorless is not a simple one.

For m43 and Nikon 1, at the least from where I am sitting, the problem is the price. One would think that savings from the mirror assembly would be reflected on the price. Lenses (m43) that are 1/2 in diameter and 1/8 in volume compared to 135 format should be in theory be significantly cheaper.

I don't think one should think so. The driving cost factor of a lens is more likely to be precision engineering and manufacturing and not so much the weight. Would a good MFT lens require less precision than a good FF lens? It might even require more, since it is smaller and the tolerances might therefor be smaller...

Regards, Mike

The absolute distance tolerances are twice as tight for MFT, but the mechanism is operating with  moving parts that are 4x to 8x less massive (mass goes down as the cube of dimension).  Part of this benefit is MFT lenses tend to have similar F-numbers (meaning much smaller aperture size).  This helps a lot with focus motor size and cost and stabilization motor size and cost.
In a lot of cases, MFT lenses are cheaper than FF equivalents, so I disagree about the price issue.  Eg., MFT systems have some nice 300mm zooms that are a hell of a lot less expensive than the 600mm zooms available for FF.
Wide angle MFT lenses are really expensive though.  Not sure why that is since the short flange distance should make it easier to design wide lenses, not harder.  Perhaps it's because the sales volume isn't there yet.

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