Mount adapters with a "correction" lens

I have a nice collection of Minolta MC and MD lenses, so I am considering buying one of the adapters with focus-confirm and the lens to correct for infinity focus.

I have a couple of questions.

I know the lens degrades optical performance, but if you have one of these (or a similar one for a different mount), how do the picture actually look? I'm not looking for prize-winning museum pictures, just reasonably good pictures. Does anyone have any examples?

Second, since these are basically mini extension tubes, what is the "f-stop" loss?

Hi Tom

I know nothing about Minolta lenses, but I have a collection of Canon FD lenses that I use on a 350D with a glass adapter.

The light loss is about 1 stop or just under, the quality loss is negligible, well in my case anyway, I have taken loads of pictures using the adapter and some of the results are displayed as A4 prints on my wall, see one of my pics below:

https://photography-on-the.net …entid=420604&d=​1263325385

If the adapter does not cost too much (mine was £17.00 in 2007) then it is worth a try, you may be suprised.

John

The loss in quality can really show up wide open. They will perform much better stopped down a stop or 2. This is real evident in the faster primes. With that said, it is pretty cheap to get an adapter and alot of the old md glass is really nice,. Try it, you don't have much to lose!

:oOops, forgot to mention that you lose probably about half a stop.

Thanks for the responses, guys. You're right... it's cheap enough to give it a try.

You loose image quality - it seems that faster and shorter lenses show more of the image quality degradion.

The adapters with lenses are comparable to teleconverters with a tele factor of ~ 1.2 .. 1.3. this gives you a longer lens (additional to the Crop factor of the camera) and these ~ one stop exposure loose.

For a 135/2.8 an adaptor with lens would be ok for internet images - probably even for bigger prints or cropped details. But for a Rokkor 58/1.2 at 1.2 you most likely see the image degradion even at 800x600 pixels image size.

I have converted an Rokkor 58/1.2 and 35/1.8 to EF mount - and I am very happy with that. If interested about how the mount conversion is done, visit my webpage!

If you have a nice collection of Minolta lenses, why didn't you buy a Sony camera. It would even provide image stabilization for your old lenses.

davidfig wrote in post #12631627
If you have a nice collection of Minolta lenses, why didn't you buy a Sony camera. It would even provide image stabilization for your old lenses.

I didn't buy the DSLR with the intent of using my older lenses; it's more like a "why not try it" thing. Besides, I try to avoid buying anything from Sony.

Does anyone have experience with a particular brand of converter?

I have a Bower FD-to-EOS converter. Works fine, and as long as I don't crop too tight, it looks fine too for internet-quality images.

davidfig wrote in post #12631627
If you have a nice collection of Minolta lenses, why didn't you buy a Sony camera. It would even provide image stabilization for your old lenses.

Those minolta lenses he has will not work on Sony (similar to fd-EOS). Minolta changed mount systems when they went to autofocus.

You can get the mounts converted to EOS:
http://www.jimbuchanan​space.com/Camera_Servi​ces.html
Top notch workmanship.
I have some more Minolta Rokkor glass in need of conversion myself.

I have also tried the Fotodiox adapter that has glass in it w/ a Spirotone 135mm f1.8 in MC/MD mount:
My copy of this giant hunk of glass came in Minolta MC/MD mount.
I'm using an adapter from Fotodiox, it has glass in it.
I know this isn't the correct solution, but, I wanted to play as soon as I could.
I am uncertain if the adapter or the lens causes the vignetting I see in my pics.