M43 Crop Value?

andythefilmer

andythefilmer

Veteran
Hi y'all, I'm sure I could be finding this a million different places, but what is the crop value on a M43 sensor? I know APS-C is 1.6 and APS-H is 1.3... Does 4/3 mean 1 1/3 inches? Thanks
 
Just to add to this while I see it, am I right in thinking it's a 2x crop for dslr lenses but only 1.2 for PL mount glass?
 
Barry_Green said:
2x for compared against a "full frame" DSLR. 1.2x for compared against a 35mm cinema camera.
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So a 25mm on the Af101 = 50mm in 5D terms, whereas a 42mm lens (if it exists) on an AF101 would be the equivalent of a 50mm on a 35mm Cine Camera, right?

Just received and devoured your AF100 book btw. A great reference :thumbsup:
 
benfscott said:
So a 25mm on the Af101 = 50mm in 5D terms, whereas a 42mm lens (if it exists) on an AF101 would be the equivalent of a 50mm on a 35mm Cine Camera, right?
Click to expand...

One of the reasons I prefer PL/Cine glass, as it's not far away with the 1.2x crop. Really, if users point of reference is the 5D/Full frame, they'll feel restricted... but, if you're used to cine glass, it doesn't change your framing much on a the AF101 (GH1/GH2) etc.
 
MadMonkFish said:
One of the reasons I prefer PL/Cine glass, as it's not far away with the 1.2x crop. Really, if users point of reference is the 5D/Full frame, they'll feel restricted... but, if you're used to cine glass, it doesn't change your framing much on a the AF101 (GH1/GH2) etc.
Click to expand...
But it's not a function of the pl/cine glass, it is the sensor/film size you are comparing it to.
 
RJS said:
But it's not a function of the pl/cine glass, it is the sensor/film size you are comparing it to.
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Not a function of the glass specifically (unless it was 16mm which might not cover the image circle required or lenses that don't resolve for 4K etc - but that wouldn't change the focal length - just what the lens can see). But, I was simply meaning that, if you think in terms of 35mm (cine) as your base, you won't go far wrong with the maths... but, if you start from Fullframe (35mm stills), people often get a surprise in terms of crop.

So, someone moving to an AF100/similar with a collection of PL glass and having shot on 35mm/similar won't be too shocked by the way their favourite 35mm lens looks - but a 5D shooter who sticks his nifty 50mm on will be concerned by the 2x crop effect.

So, for old guys like myslelf, I find it easier to stick to a lens type across the board and not get any shocks... don't think my ticker could stand it
 
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