Ren Kockwell (you know who I am referring to) is a TOTAL IDIOT

Let me quote the fool below,...if you cannot find 100% fault and ignorance in everything he says, then you should sell your camera and take up another hobby/ job.

Many decades ago lens adapters were popular because cameras and lenses didn't communicate with each other, and because cameras and lenses were all made by different companies anyway.

Today it's foolish to try to adapt different lenses to digital cameras. There is no communication between lens and camera, so it's a royal pain to try to shoot with the Frankensteinian combination, and the results usually aren't as good.

When you use a lens adapter, you sentence yourself to enormous added hassles of losing metering, losing exposure automation, losing data recording, losing autofocus and losing automatic diaphragm operation: you have to remember to close and open the diaphragm by hand for each and every shot!

People quickly learn that you can't really use other brands of lenses on your DSLR or mirrorless camera because of this added inconvenience, and the potential for quality loss when using lenses optimized for different formats just isn't worth it.

It doesn't matter if you can get an Olympus OM lens and a Sony NEX adapter or whatever inexpensively on ebay, because the resulting combination of using an older lens on a digital camera always results in frustration, and the end results are rarely as good as using the correct lens in the first place.

Even the crummier modern mirrorless lenses are often optically better than using older top-end SLR or rangefinder lenses because newer lenses use far newer designs which are usually much sharper than what we accepted for use back on full-frame 35mm film.

In almost all cases, there is no electronic communication from the adapter, so you get no EXIF information, either, about the lens or its focal length.

Yes, it's easy and inexpensive to adapt old lenses to your new camera, but actually shooting with it will be a big pain. Using a lens on an adapter adds many more steps between you and your photo, all of which are taken care of automatically when you use the correct modern lens for your camera. The results with the modern lens will probably be better than with an old adapted lens, too.

If you use an adapter and like it, don't let me discourage you, but if you're asking my advice, adapters make everything much more complicated. Any time I'm thinking about my camera instead of thinking about my subject and what's in my picture winds up as weaker images.

Lens adapters are for tweakers, not for productive photographers.