"The full frame myth"

Started Dec 19, 2013 | Discussions thread
James O'Neill Veteran Member • Posts: 4,673
You cannot change the laws of physics...

You throw a number of pixels at digitizing an image.

You can't get more detail out in the result than the lens formed in the image you digitize. All throwing more pixels into the equation does is increases the fidelity that image is digitized with.

Now you can throw 40MP at digitizing an tiny image formed by a tiny lens (in the case of the Nokia 1020) or 40MP at digitizing and giant image formed by top end lens (in the case of the Pentax 645D). To listen to Riechmann with his

> Digital cameras with less than 11MP were hard pressed to give us the large prints that we wanted and needed, and for a long time 11MP was the exclusive domain of Full Frame


> do we need pixel counts much above 24MP, and therefore a full-frame sensor?

you have to say he thinks cameras with the same numbers of Pixels are equal. The aren't. If Pentax made a 16MP FF camera I'd have bought it.

The mirror box on Pentax, Sony , Nikon and Canon cameras is designed for a 36x24mm film frame a sensor filling the back of that mirror box wouldn't make the camera bigger or heavier (although if you want to go from a 200MM f/2.8 to the equivalent 300 f/2.8, the lens will be bigger).  The bigger sensor *will* cost more.  And the APS-C and smaller sensors can produce very, very good images. The interesting question is where is the sweet spot. The 645D is too big. The sensor in Q is too small. APS-C in film-derived bodies was a quick fix. If APS-C is the sweet spot for sensor size, a smaller body makes sense, if the K3 is the sweet spot for body size an FF sensor makes sense.

 James O'Neill's gear list:James O'Neill's gear list
Pentax K-5 IIs Pentax K-1 Pentax smc FA 50mm F1.4 Pentax smc DA 18-250mm F3.5-6.3 Pentax smc FA 43mm F1.9 Limited +2 more
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