X-T1 looks mighty interesting, what do you think?

Started Jan 28, 2014 | Discussions thread
slimandy Forum Pro • Posts: 17,155
Re: size/weight is what counts with m4/3

ilsiu wrote:

rovingtim wrote:


True equivalence does not exist;

Yeah it does. Equivalence answers this question: if I want the same image in terms of angle of view, depth of field, noise using the same shutter speed from two camera systems, what are the settings required?

By extension equivalence answers this question: are there any settings in one system impossible to duplicate in the other?

I'm not sure how to get all 4 (angle of view, depth of field, noise/ISO, shutter speed) simultaneously equivalent.

If I have on FF (I chose FF instead of APS-C because the conversion math is easier):

Focal length (angle of view): 24mm

Aperture (DOF): f5.6

ISO (noise): 400

Shutter speed: 1/250

Then here are all the different combination that can be done on mFT. There's only one combination that is equivalent for all 4 parameters, but then mFT is overexposed by 2 stops relative to FF.

That's because to get the same DOF you'd get with FF you need to shoot 2 stops faster with MFT. f2.8 is the 'relative' aperture.

-- hide signature --


 slimandy's gear list:slimandy's gear list
Sony RX100 II Nikon D200 Nikon D700 Fujifilm X-E1 Fujifilm X-T1
Post (hide subjects) Posted by
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow