JBGLADSTONE wrote:
My question is, is there a better quality by selecting Raw only vs Raw +jpeg or jpeg only vs Raw+jpeg?
I will ALWAYS use both Raw and Jpeg when taking pictures of sporting events.
The explanation is a bit lengthy, so have patience.
I shoot Olympus E-M 1ii (but the conditions would be the same with my E-M10ii). I do so because these are lighter and the lenses are smaller, lighter, and cheaper than those on a full frame.
They both have a m4/3 sensor, which is smaller than full frame, of course. This means that with the crop factor, a 2.8 aperture on the Olympus will have a depth of field comparable to f/5.6 on a full frame. (someone please correct me if this is a false assumption.) What this means is that with an f/2.8 lens, I cannot sufficiently defocus the background.
My solution is to use primes, 45mm f/1.8 for basketball, and 75mm f/1.8 for soccer, lacrosse, etc. these will give me (unless I am mistaken, and if so please correct me) the depth of field equivalent of a 2.8 on full frame.
But to get to the point---why use Jpeg as well as Raw?
Because both of these cameras have a digital zoom which doubles the size of the picture (or for purists, it narrows the field of view), but only in Jpeg format. This means that on a m4/3 sensor with the crop factor, the 45mm equals 90mm in raw and 180mm with the digital zoom (on full frame); the 75mm equals 150mm in raw and 300mm in jpeg (again relation to full frame equivalents. With the digital zoom, it appears to double the outside dimension, so that the content is four times as large (2x2=4).
Some of my assumptions about the resizing may not be accurate, and I might lose something from the in camera resizing, but it is clear that the Jpegs have far more resolution than the Raws cropped to the same size.
So, why do I capture Raw images as well? Because when the action comes closer to me, the Jpegs would have me too close to get it all in.
So what I have is a lens with effectively two lengths. This is not as good as having a zoom, of course. But I have a kit which is far lighter and far less expensive than full frame would be. I can carry the camera and lens easily with a wrist strap for several hours. And I am far more mobile and responsive than I would be with bulkier gear.