problem using extention tubes. need help

first of all, i'm sorry if im posting in wrong section. couldnt figure out where to post this macro extension related question
now here is the thing
today i got my cheap macro extension tubes from ebay
its manual tube. im using 60D with 50 1.8, 18-55 and 55-250 lens
now the thing is , i know i must have to manually focus plus manual exposure.
but i cant get it right. i have tried with my all 3 lenses.
the image is always blur. it never gets sharp. i been trying to set manual focus plus shuffling ISO and Shutter-speed, but i cant get it right.
any help ?
thanks

get closer...you have to get really close...and if you're like me you put all 3 on at once...in which case you have to get really really close...

but bottom line is you're too far away

also you don't have to manually expose(wait, i just saw you have the manual tubes, maybe you do, although i still doubt it)...set the lens to AV mode, and you should get the correct shutter speed...if there's not enough light, then motion blur could be affecting you, and if you have enough light then the DOF being so shallow could be a problem

past a sample. Need more data.

Light? Needs lots and lots of light.
Shutter speed? Need to be pretty fast as even micro movements will impart lots of blur.
Mirror lock up? It helps reduce camera shake.
Tripod? The closer it is to a ton of iron, the better.
Aperture? Even at f/11 your DOF is going to be razor thin.

DreDaze wrote in post #15479355
get closer...you have to get really close...and if you're like me you put all 3 on at once...in which case you have to get really really close...

but bottom line is you're too far away

also you don't have to manually expose(wait, i just saw you have the manual tubes, maybe you do, although i still doubt it)...set the lens to AV mode, and you should get the correct shutter speed...if there's not enough light, then motion blur could be affecting you, and if you have enough light then the DOF being so shallow could be a problem

thanks alot for the reply
and yes. that was the thing. i was using all of the three at once
Plus i was not too close to the subject as well
tried it now. n it worked well,
Thanks alot.
as for manual exposure thing . well there is no aperture thing when the extension tube is attached. so i guess the aperture wud be locked , im having control of just shutter speed and ISO i guess.

You'll also want to set a smaller aperture for closeups. Since the tubes don't transmit aperture information, mount the lens you want to use directly on the camera. Set the aperture you want and press the depth of field button to close down the iris. With your third hand (while holding the DOF preview button with your second hand), press the lens release and twist off the lens. The aperture will now be locked at your desired setting.

You can now mount the tube(s) and lens on the camera.

ekfaysal wrote in post #15479404
as for manual exposure thing . well there is no aperture thing when the extension tube is attached. so i guess the aperture wud be locked , im having control of just shutter speed and ISO i guess.

You could set the aperture, hold the DOF preview, and remove the lens, then attach it to the tubes. Kind of a pain though.

EDIT: oldvultureface beat me to it

s.l.k wrote in post #15479430
EDIT: oldvultureface beat me to it

Yeah, but it's the thought that counts.

Buy a set of tubes with the electrical connections, Polaroid, Kenko and a few others do them. Tubes without control of the aperture will either make you the most accomplished manual photographer in the World or the most bitter, twisted, deranged and forlorn person on Earth. My money would be on the latter. In short; you haven't saved any money by buying cheap tubes, you have bought a World of pain.

thanks guys
all of you
it really helped me
im now gonna play with ext tubes n will try to capture some cool macros

It is quite common that a very short FL on the wide-to-short-tele zoom lens will result in needing to have the object 'inside the lens' for it to be in focus...the focus distance is not possible. Try setting your zoom FL to at longest setting when using the extension tube, and you will likely be able to achieve focus. Then you can shorten FL progressively until you discover the limit at which it is impossible to achieve focus.

You should be able to achieve focus with the 50mm f/1.8 and extension tube...just keep trying until you get focus, then note the focal plane-to-subject distance...it will be quite close with long extension tube use.

Well, Thanks everybody for suggestions.
you guys rock
i saved money and got the cheaper one. n iknow its gonna be pain to capture macros each time
Here is what i experiment today.
practically my first macro shot
Thanks everybody.

IMAGE LINK: http://www.flickr.com …lsphotography/8​378197080/

Nice. Which one of your lenses did you use? It's very sharp.

Nevermind. I saw it in the 55-250 thread.

oldvultureface wrote in post #15483535
Nice. Which one of your lenses did you use? It's very sharp.

Nevermind. I saw it in the 55-250 thread.

Yeah. that was with 55-250... n did some post processing as well.