I appreciate the help but I know and understand everything you just wrote. But you still didn't really answer my question. I feel that we can achieve the exact same result with either modes with no extra effort in either. Is this true? Because in S mode for example, we get to control shutter speed as well as exposure compensation. The camera takes care of aperture control. But when we adjust exposure compensation, the camera is effectively adjusting aperture. Does this not also affect the depth of field? So I can still control depth of field by adjusting exposure compensation? And vice versa for A mode.
You can't set f-stop in camera with an adapted lens. The rest of your stetement is correct.
Hang on, if you can't set the F-stop in the camera, then how will it automatically adjust shutter speed? It wouldn't really know what aperture to base on would it? Or does it just rely on the amount of light coming in?
Not really, as far as I know the adjustment of EV of itself does nothing - it merely over-rides and adjusts the cameras own exposure meter reading. From then on the camera mechanism acts as normal to the dictates of the now adjusted exposure meter setting.
Yes, it just depends on the amount of light coming in, and you determine that by setting the f-stop on the lens.
It's like operating an early SLR with aperture-priority automatic exposure (shutter priority and program modes came later): Set aperture using the lens adjustment collar and the camera varies shutter speed to maintain exposure via the meter.
But surely, in S mode the shutter value becomes fixed when you set it. If the lens is a MFT one, when you turn the exposure compensation the diaphragm gets adjusted, to give a brighter or darker picture, and the DoF varies accordingly (as suggested above). But if the lens is an adapted one, the aperture won't budge through commands from the camera, therefore the only way to do exposure compensation is by changing the aperture ring in the lens itself.
In the case of your Super Tak and other lenses with an Auto/Manual switch, it doesn't matter if the adapter has a "ledge" or not (provided you keep the switch set to Manual), but there are lots of M42 lenses that are Auto-only and don't have that switch. In those cases you need an adapter with the "ledge" to disengage the rear pin on the lens or you need to find a way to keep the pin depressed, perhaps by taping it down.
My E-M10 behaves the same way as the OP's. With the adapted lens mounted in S mode, the rear display histogram and Exposure Compensation scale doesn't change no matter what shutter speed I set and there's no way of knowing the 'correct' exposure. Adjusting the front Exposure Compensation dial changes the histogram and EC scale and dims or brightens the display but the actual exposure doesn't change.
What exactly do you mean by "support"? I mean, my camera "supports" S mode with manual lenses. Shutter speed control works and I can see the exposure compensation changing the look of the image and the values on the viewfinder, but it just makes no difference to the final picture. Someone earlier reported that this happens to them also. Is this not the case for you?
Aargh. Marcus, you broke my EM5. Nothing happens in M mode now when I turn the shutter dial. Just like your EM10.
In looking at your gallery it's clear that you know how to manipulate shutter speed and aperture, and to use exp. comp., but I am mystified that you think exp. comp. can simply control aperture for DOF control independant of over-brightening or darkening the whole scene.
I fully agree.
Well the thing is, as a hobbyist, I studied everything myself by reading guides and whatever books I could find but there were things that I never quite understood and simply needed them to be explained to me. So I was able to grasp fundamentals like aperture, shutter speed etc. and what effects they have. But I never understood what Exposure Compensation was actually doing until this thread when people started telling me that when you adjust EC, you are just adjusting shutter speed or aperture, depending on if the camera is in A or S mode. Logically from that, I would assume that you'd still be able to achieve a variety of DoFs by adjusting the EC in S mode for example. I never did that myself as you can see from my gallery but that's the conclusion I got from what everyone was saying.
