It's hard ... it's really really hard to make old things work the way you want them to but sometimes it's worth it giving you exactly what you wanted or even more the you expected. But why? Why would you even try? Some can't afford expensive lenses, some just have inherited there family or friend's camera/lenses or some of us just enjoy the challenge that we have lost (now that's another debate for another day) since the arrival of digital photography.
Ever since I got into photography (with just a camera phone) I had a need to see and photograph the small world that we so much ignore and unobserved from day to day life. I started the experience with a Revuenon 50mm f 1.8 lens in M42 mount but it didn't get me close enough. So I got my self macro tubes for M42 mount with he following FL: 11mm, 20mm, 30mm. Then I got a Compact 70-210mm f 4-5.6 to get some longer macro shots.
Now I don't really know the magnification levels but they seem to be at least 0.5x to 1x on either lenses. I usually use all the macro tubes to get the maximum possible magnification so light get's lost really fast and more then I like to I have to use high levels of ISO even wide open to get the shot to ve as sharp as possible but it's harder because the lack of IS on my Panasonic G2 body.
I had to learn, in time, to live without IS and I managed to be able to get sharp enough with shutter speeds of 1/100s - 1/125s. But hard trads have to be made: wider aperture = higher shutter speed / lower ISO + smaller DOF vs more DOF = smaller aperture + lower shutter speed / higher ISO. Trading sharpness with DOF, ISO noise with motion blur makes hard decision that you have to make it in split seconds. Most of the time I sort from hundred of photos in the hopes that one, just one, might be the lucky one to be sharp enough. And that's why I shoot only in High Burst Rate.
Here's some of my good or bad (depends on your preference and/or pixel peeping) shot's that I managed to take.
#1 Revuenon 50mm, f 1.8, 1/125s, ISO 200
#2 Revuenon 50mm, f 1.8, 1/640s, ISO 100
#3 Revuenon 50mm, f 8, 1/125s, ISO 100
#4 Hanimex 135mm f 2.8, 1/320s, ISO 100
#5 Revuenon 50mm, f 4, 1/60s, ISO 100, flash
#6 Revuenon 50mm, f 2.8, 1/1300s, ISO 100
#7 Revuenon 50mm, f 5.6, 1/500s, ISO 100
#8 Revuenon 50mm, f 1.8, 1/250s, ISO 100
#9 Revuenon 50mm, f 1.8, 1/2000s, ISO 100
#10 Revuenon 50mm, f 1.8, 1/200s, ISO 100
#11 Revuenon 50mm, f 5.6, 1/160s, ISO 100
#12 Revuenon 50mm, f 1.8, 1/200s, ISO 100
#13 Hanimex 135mm f 2.8, 1/640s, ISO 100
#14 Revuenon 50mm, f 1.8, 1/1000s, ISO 100
#15 Revuenon 50mm, f 2.8, 1/1000s, ISO 100
#16 Revuenon 50mm, f 1.8, 1/800s, ISO 100
#17 Revuenon 50mm, f 2.8, 1/125s, ISO 200
#18 Revuenon 50mm, f 2.8, 1/250s, ISO 100
#19 Revuenon 50mm, f 1.8, 1/125s, ISO 500
#20 Revuenon 50mm, f 1.8, 1/125s, ISO 125