Mirrorless Interchangable lens cameras..... Opinions sought.

[lucifer]

@ lucifier - Equivalence
Well I guess that I was right

It would seem that you are. But there is still one point I would like discussed.

Pixel size matters when it comes to the final quality of the image. A 10MP sensor on a P&S will produce a picture with much more noise than a 10MP pixel on a full-frame camera. The reason is this: Smaller sensors have the same number of pixels crammed in a smaller area. This means the pixels are smaller. Larger pixels produce images with much less noise.

So while technically exposure does not depend upon the sensor size, in the context of available equipment, it does become a factor.

f/2 on a P&S may produce brighter images than f/3.5 on a DSLR (APS-C or full frame). But the low light performance of the P&S will be poorer than that of the DSLR for precisely the reason explained above.

 

[Sounava]

^ Yeah that is a known fact. I was not talking anything about the picture quality. "Noise" is not part of the "exposure". Exposure is a function of aperture, shutter speed and ISO only. Whether the image is noisy or not is another thing altogether.

 

[TechOutsider]

Please differentiate between noise per unit of area and noise per pixel.

Per unit area, you'd be surprised - more pixels resolve more detail and allow for lighter AA filters. Coincidentally, newer cameras generally feature more pixels, and newer cameras have improved sensor technology, further widening the gap.

Per pixel, your right.

So there is a case to be made for smaller pixels per unit area.

Pixel size matters when it comes to the final quality of the image. A 10MP sensor on a P&S will produce a picture with much more noise than a 10MP pixel on a full-frame camera. The reason is this: Smaller sensors have the same number of pixels crammed in a smaller area. This means the pixels are smaller. Larger pixels produce images with much less noise.

How would the P&S produce a brighter image? If both cameras were set to "Auto" then both would produce almost identical exposures, save for individual camera processing.

And of course the P&S will be poorer in low-light at 100% because of pixel size, but per unit area, equal to or better than the DSLR.

Reducing the pixel count will only reduce the noise per pixel but it doesn't yield us any resolution improvements and the lighter AA filters that inherently come with higher resolution. Not to mention IQ flexibility such as more scope for noise reduction.

f/2 on a P&S may produce brighter images than f/3.5 on a DSLR (APS-C or full frame). But the low light performance of the P&S will be poorer than that of the DSLR for precisely the reason explained above.

 

[lucifer]

^ Yep, we are both saying the same things differently I suppose.

 

[panu]

So far i know Noise comes from quality of sensor and directly related to higher ISO . ISO is not actually not very same and differs from camera to camera. Many cameras give erroneous ISOS .


Ideal Actual exposure E= f( ISO,aperture, shutter speed)

But we do have different kind of lens. And SAME AMOUNT OF aperture control gives DIFFERENT qualities for different lenses , if you even keep ISO and S P constant. (tell me if i am wrong)


So Effect of Aperture Control = f (quality of lens)


Quality of final Picture Q1= f (non ideal actual exposure E(e) , sensor type and size , incamera software for processing and storing)

Quality of print Q2 = f (Q1 , Printer , paper)

 

[TechOutsider]

Noise is not directly tied with ISO.

Noise is related to the total amount of light a sensor receives. A ISO 800 shot at f/4, 1/30s will have essentially the "same" noise as a ISO 1600 shot at f/4, 1/60s. Why? The ISO may be a stop faster, but the camera also receives a stop more light. So things equal out in the end.

So far i know Noise comes from quality of sensor and directly related to higher ISO . ISO is not actually not very same and differs from camera to camera. Many cameras give erroneous ISOS .

 

[singhgp62]

Eight years on dear friends;
So what are your views now regarding mirrorless cameras as a travellers sole companion?

 

[Yogesh Sarkar]

Mirror less cameras have gotten better and grown larger in size. Yet, they are costlier than entry level DSLRs.

On the positive side, smaller lenses have come out. So overall space and weight saving is there. Making them a good option for travellers with good enough budget.