thank you. It's not about buying a proper lens for macro, it's about using one I already have. Instead of looking at it lost in a drawer, I may use it with a cheap adapter. Not a huge investment. In MFT terms old lens 200 means 400mm - I think it's more fun to shoot the Moon and maybe birds, rather than small insects.
the other thing that bother me is the weight...600 g!!!
I think, you might achieve what you are looking for, if I'm not wrong by using any adaptors you are loosing from f stops. You also might try to use Raynox attachmend, to see if that's help.
Probably
Helix_2648 or
Greg might give you a better advice.
Vintage lenses are a charm!
Well you can buy an adapter to use your vintage lens.
By using an adaptor to mount vintage lenses to your digital camera you have to be ready to work in manual exposure mode without establishing any communication from lens to camera. There is the exception of course of using same camera / lens brand with backwards combability like in example Nikkor ais lenses on FX Series and DX D7XXX camera series (except D7500) or like pentax or even minolta af lenses on a77 or a99 etc....
Anyway.
Macro photography with vintage lenses (not generally) opens new dimensions of photographic potentials. I quoted the word not generally because not all vintage lenses worth spending your time on them.
Their optic flaws and thus the character created out of them, when handled creatively can deliver unbelievable results. And I'm not talking about sharpness or vignetting or coma.... I'm talking about character, contrast behaviour, optics performance in relation with lens design and even flare.
Before you proceed to any investment visit flickr, type the model of your lens in the search box and view the photo results to get an idea of how your vintage lens performs. You will see only the half true there... But it a chance to get an idea.
Most of the adapters can be found really cheap as well as some old lenses.
For me it worth the investment as long as you choose 'a proper lens' and as long as you are ready to have fun with it.
As about the f stops Jack mentioned (I suppose Jack that you mean possible Luminocity loss ) you will not have any problems as long as you do not use lengthy adaptors.
I'm using M42 lenses periodically with no f stop luminosity loss. My only problem. Extension tubes have luminosity.
I hope I was helpful.