A few words on Equivalence and comparing systems

Started Apr 2, 2013 | Discussions thread
Macx
Senior MemberPosts: 1,248Gear list
Like?
Re: A few words on Equivalence and comparing systems
In reply to Sean Nelson, Apr 3, 2013

Sean Nelson wrote:

Macx wrote:

Two systems using lenses that each provide the same angle of view and with the same physical size of the aperture are equivalent.

The reason this topic is the source of so much debate is that "equivalent" means different things to each of us, because we all come to the table with different goals and priorities.

If I were to buy into the M43 system, it would be in the full knowledge of the limitations that come with the reduced sensor size.   I'd be choosing M43 because I deem it "good enough" for the kinds of pictures I take and the uses to which I put them.   In other words, I'd be accepting the fact that I'd have a smaller envelope of shooting conditions under which I can get the kind of shots I want.

Given that fact, as long as I'm shooting pictures within that envelope, a 12-35mm f/2.8 lens on an M43 camera will let me do the same things as a 24-70mm f/2.8 lens on a full frame camera.  In that sense, for my needs I'd consider the two lenses to be "equivalent".

How the sensor behaves in a camera is definitely a big part of how well the system as a whole performs, but don't underestimate how much the lenses matter. It's easy to think of the envelope being defined by the sensor performance, when instead it's the slower lenses that creates these limitations.

I agree completely that most of us buy into the system with both eyes open. We accept a smaller envelope in some regards, but are happy to do so because of the advantages in size and weight. I certainly am.

Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow