Difference Between Micro 4/3 and 4/3

Started Feb 13, 2013 | Questions
JoeBrautigam
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Difference Between Micro 4/3 and 4/3
Feb 13, 2013

So i have either a really dumb question or an actual question....Im looking to get a new lens for my olympus pen epl1 and the one i want is rokinon fisheye but theres two theres olympus 4/3 system category or micro 4/3 and the one in the olympus 4/3 system i really like...hahaha so im just wondering if there is a difference or the olympus 4/3 system category will only work for olympus and not other brands.

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Leonard Migliore
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Re: Difference Between Micro 4/3 and 4/3
In reply to JoeBrautigam, Feb 13, 2013

JoeBrautigam wrote:

So i have either a really dumb question or an actual question....Im looking to get a new lens for my olympus pen epl1 and the one i want is rokinon fisheye but theres two theres olympus 4/3 system category or micro 4/3 and the one in the olympus 4/3 system i really like...hahaha so im just wondering if there is a difference or the olympus 4/3 system category will only work for olympus and not other brands.

The original 4/3 system was for single lens reflex cameras. This has been a generally unsuccessful type of product. The micro 4/3 system was then introduced. This has a similar lens mount to 4/3 but it's closer to the sensor. It won't work with reflex cameras but does work with electronic view finders. Micro 4/3 seems to be a more viable system than 4/3.

Your Olympus is a micro 4/3 camera, so you should get micro 4/3 lenses for it. Lenses for the original 4/3 system will only fit with an adapter.

Why do you prefer the 8mm 4/3 fisheye over the 7.5mm micro 4/3 fisheye?

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Leonard Migliore

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Chris R-UK
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Slower focusing
In reply to Leonard Migliore, Feb 13, 2013

Apart from requiring an adapter, the main disadvantage of using 4/3 lenses on an M4/3 body is that they are slower focusing.

4/3 cameras were DSLRs with phase detection focusing whereas M4/3 cameras are mirrorless with contrast detection focusing.  The design requirements for phase detection and contrast detection lenses are different which is why the 4/3 lenses are slower focusing on M4/3 bodies.

Having said that there are some 4/3 lenses that have no equivalent on m4/3 bodies, e.g. the professional quality Olympus 50-200mm f2.8-3.5 lens.

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Chris R

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Pedagydusz
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Re: Difference Between Micro 4/3 and 4/3
In reply to JoeBrautigam, Feb 13, 2013

I think you will be better served in respect to answers if you post this in the Micro Four Thirds forum, it is where it belongs.

Having said that, I see that the previous posters gave you the condensed but essential answers.

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sigala1
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Different lens mount
In reply to JoeBrautigam, Feb 13, 2013

JoeBrautigam wrote:

So i have either a really dumb question or an actual question....Im looking to get a new lens for my olympus pen epl1 and the one i want is rokinon fisheye but theres two theres olympus 4/3 system category or micro 4/3 and the one in the olympus 4/3 system i really like...hahaha so im just wondering if there is a difference or the olympus 4/3 system category will only work for olympus and not other brands.

Both systems have the same size sensor. Lens mounts are different.

A micro 4/3 lens will not fit on a 4/3 camera, and vice versa.
There is an ADAPTER that will allow a 4/3 lens to be used on a micro 4/3 camera, but not the other way around. Some 4/3 lenses will not auto focus correctly when using the adapter and you will have to use manual focus. Or if they do auto focus correctly, it will be very slow.

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JoeBrautigam
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Re: Difference Between Micro 4/3 and 4/3
In reply to Leonard Migliore, Feb 20, 2013

Leonard Migliore wrote:

JoeBrautigam wrote:

So i have either a really dumb question or an actual question....Im looking to get a new lens for my olympus pen epl1 and the one i want is rokinon fisheye but theres two theres olympus 4/3 system category or micro 4/3 and the one in the olympus 4/3 system i really like...hahaha so im just wondering if there is a difference or the olympus 4/3 system category will only work for olympus and not other brands.

The original 4/3 system was for single lens reflex cameras. This has been a generally unsuccessful type of product. The micro 4/3 system was then introduced. This has a similar lens mount to 4/3 but it's closer to the sensor. It won't work with reflex cameras but does work with electronic view finders. Micro 4/3 seems to be a more viable system than 4/3.

Your Olympus is a micro 4/3 camera, so you should get micro 4/3 lenses for it. Lenses for the original 4/3 system will only fit with an adapter.

Why do you prefer the 8mm 4/3 fisheye over the 7.5mm micro 4/3 fisheye?

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Leonard Migliore

Yeah i just liked the size a bit better than the 7.5mm but the 7.5mm is probably better for traveling and just putting my camera in a bag.....Thanks for responding!!

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JoeBrautigam
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Re: Different lens mount
In reply to sigala1, Feb 20, 2013

Thankyou!!

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JoeBrautigam
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Re: Difference Between Micro 4/3 and 4/3
In reply to Pedagydusz, Feb 20, 2013

Pedagydusz wrote:

I think you will be better served in respect to answers if you post this in the Micro Four Thirds forum, it is where it belongs.

Having said that, I see that the previous posters gave you the condensed but essential answers.

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Sorry this was my first time being on this website and posting did not even know there was a micro four thirds forum....my appologies

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