how to use a macro coupling ring

ok so i got a 58mm to 58mm coupling ring..

i have a 18-55IS and 55-250IS...
plus a 85mm f/1.8


i cant find via google or here the steps to use it.. i cant figure it out.. so who has one and what do you do to get it to work?

what i thought was.. put 85mm in camera at 1.8 or 2.0.... focus it... remove lens from camera focused...

then put on 55-250 and attach 85mm..

take a pic... i just get a big circle of light in the center.. i dont focus on anything... anyone have a link to a tutorial?
thanks
Jeff

not sure what exactly you are asking.
the coupling ring is fun to play with, but the focal disatnce is quite small.
indeed to set the aperture of the reversed lens, you have to mount the lens regularly, press the depth of field button and WHILE HOLDING IT, remove the lens from the body. The reversed lens is prefered to be wide open.
The smaller the focal length of the reversed lens, the larger the magnifcation and thusly the smaller the working distance of the group.
When you have the 55-250 with the 85 mounted reversed on it...you put the 55-250 in manual focus and you have to weave in and out until you get focus. There are some combos when the working distance is so small that the combination is impractical or even impossible (especailly considering that you have to add light in the mix!!)
I would suggest starting with the 55-250 at 55mm and the 85 wide open and start looking for a focal point. Please remember though that the depth of field is going to be very very very VERY small...so you will have that as a block as well.

then you experiment and play.

hope this helped

helps some... i dont think i was close enough to the subject.. (pencil point)...

depth of field button... i have to look that up...

i set the 85mm up at f1.8 and auto focused it.. shut camera off and took the lens off.. so that wasnt right...

The reversed lens should be wide open and focused to infinity. The main lens should be stopped down for depth of field. A reversed lens is just acting as a well-corrected diopter filter. 1000mm/focal length=diopters. 50mm reversed = 20 diopters etc. If you stop down the reversed lens on the front of a regular lens, you will just make the image smaller like you see.

The focus range will be very small and changing the focus won't move it that much. You'll need to move back and forth to find the focus plane. Likely it will be less than 50mm from the back of the reversed lens.