Amazing lens, incredible sharpness

mausta wrote:

Try setting camera to Aperture mode. Adjust aperture on lens, ISO on camera, then let your camera pick the shutter (and resulting proper exposure).
I have gotten wonderful and reliable results with my:
Canon FD 50mm f1.8 $35,
Canon FD 70-210mm f4 $60
Canon FD 50 mm Macro f3.5 $75
Minolta Rokkor 58mm f1.4 $50
Nikon Micro 55mm f2.8 (one of the sharpest Nikon lenses ever) $200

I use FOTODIOX and FOTASY adapters, $25-35 each.

The field of view on ALL lenses mounted on m43 camera bodies is 2x.

Compared to FF, not compared to mFT. For example, the Olympus 45 / 1.8, which was designed specifically for mFT, will be a little wider than the 50 / 1.8 for FF when it is used on mFT.

45mm = 90mm in full frame.

No, 45mm is 45mm and 90mm is 90mm. The focal length doesn't change when you put the lens in front of a different size sensor. But, sure, the diagonal angle of view of 45mm on mFT is the same as 90mm on FF.

The Aperture is THE SAME. The Depth of Field DOF is also 2x.
So a f1.4 lens will have an approximate DOF of a f2.8 lens on a Full Frame body.

Like focal length, the aperture doesn't change when you put the lens in front of a different size sensor, either. But, also like focal length, the effect of the f-ratio does change as a result of the sensor the lens is mounted in front of, and not just in terms of DOF, either.

For example, f/1.4 on mFT not only has the same DOF as f/2.8 on FF (for a given perspective, framing, and display size), but it also puts the same total amount of light on the sensor for a given shutter speed, resulting in the same noise for equally efficient sensors.

But, I note from your rant that you "could really CARE LESS about light gathering pixel density BLAH BLAH BLAH.....", so what do you care about the f-ratio of the lens, anyway?