Leica; "4/3rds quality just not there."
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From: J. Clarke on 24 May 2010 18:19 On 5/24/2010 3:51 PM, Bob G wrote: > On May 24, 2:45 pm, nospam<nos...(a)nospam.invalid> wrote: >> In article >> >> >> 4/3rs can never be full frame. it's maximum size is what it is. it can >> never be any bigger. > > 4/3 is an artihmetic ratio - unless it's been registered as a > proprietary name (which I doubt), it can be applied to any rectangular- > shaped object that satisfies it. So what rock have you been living under for the past ten years that you are unaware of the multiple-vendor 4/3 standard that allows bodies and lenses from Panasonic, Leica, and Olympus to be interchanged freely?
From: Bob G on 24 May 2010 18:38 On May 24, 3:22 pm, nospam <nos...(a)nospam.invalid> wrote: > In article > <5201c112-e9bc-4f35-9aac-06d7f2662...(a)c13g2000vbr.googlegroups.com>, > > Bob G <mrbobja...(a)yahoo.com> wrote: > > > 4/3rs can never be full frame. it's maximum size is what it is. it can > > > never be any bigger. > > > 4/3 is an artihmetic ratio - unless it's been registered as a > > proprietary name (which I doubt), it can be applied to any rectangular- > > shaped object that satisfies it. > > 4/3rds has been registered and it's based on the *size* of the sensor, > not (just) it's aspect ratio. > > full frame means a 24x36mm frame, the standard 35mm film frame, and > it's a term that began 50 years ago when olympus came out with a > half-frame 35mm film camera. I can't see "4/3" being registered by anyone, "Four Thirds" maybe. And 4/3 is not a size, merely a ratio. The size of the "4/3" sensor is approx. 18mm x 13.5mm, not 1.333... And why not call it the "Three Fourths" (3/4) sensor, anyway? It's the same thing, isn't it? But I think we're fighting over names and not concepts. By a "full- frame" 4/3 sensor I meant a larger sensor 24x32mm2, its sides in the proportion 3:4, that's all.
From: nospam on 24 May 2010 18:55 In article <e27b5562-e1b8-42e0-89cc-cb866e73d608(a)v29g2000prb.googlegroups.com>, Bob G <mrbobjames(a)yahoo.com> wrote: > I can't see "4/3" being registered by anyone, "Four Thirds" maybe. 4/3 is shorthand or an abbreviation for four thirds, just as m43 or mft is shorthand for micro four thirds. > And 4/3 is not a size, merely a ratio. it's a size. > The size of the "4/3" sensor is approx. 18mm x 13.5mm, not 1.333... the entire sensor is 4/3 of an inch, although the actual light sensitive area is smaller. <http://www.olympus-europa.com/consumer/dslr_7045.htm> Four Thirds is a reference to the size of the image sensor. The image sensor for Four Thirds cameras is what is commonly referred to as a 4/3 type or 4/3 type sensor. > And why not call it the "Three Fourths" (3/4) sensor, anyway? It's the > same thing, isn't it? no. 3/4 is less than 4/3. > But I think we're fighting over names and not concepts. By a "full- > frame" 4/3 sensor I meant a larger sensor 24x32mm2, its sides in the > proportion 3:4, that's all. full frame means 24 x 36 mm. 4/3 can never be that big.
From: Fred McKenzie on 24 May 2010 20:01 In article <240520101322401249%nospam(a)nospam.invalid>, nospam <nospam(a)nospam.invalid> wrote: > full frame means a 24x36mm frame, the standard 35mm film frame, and > it's a term that began 50 years ago when olympus came out with a > half-frame 35mm film camera. You mean SINGLE frame, don't you? (Based on 35mm motion picture film.) Fred
From: nospam on 24 May 2010 20:13
In article <fmmck-0D78E4.20010724052010(a)5ad64b5e.bb.sky.com>, Fred McKenzie <fmmck(a)aol.com> wrote: > > full frame means a 24x36mm frame, the standard 35mm film frame, and > > it's a term that began 50 years ago when olympus came out with a > > half-frame 35mm film camera. > > You mean SINGLE frame, don't you? (Based on 35mm motion picture film.) initially it was single and double frame, 18x24 and 24x36, but few cameras used 18x24mm. 24x36 was pretty much the standard size. then olympus came out with the pen camera and called it half-frame, so 24x36mm became known as full frame. that was 50 years ago and the term has stuck since then. |