would a tube solve this ?

[Allmost]

Hello,
ok two questions for you experts

took this with my 100 mm lens. [no tripod, but I place the lens right against the front glass]

then I used the tools to trim it, and zoom into my beautiful red bugs lol

how can I get a pic, closer to the red bug ? to see more of it ? more details. when I zoom this in anymore, it becomes unclear.

would a tube behind the lens solve it ? is there a zoom lens that would go before macro ?

and on same lines, my GF wants to take pics of her eye. to see details, it should be cool, but the macro lens again fails to go close enough as I want.


Please advice only thing that comes to my mind is, "this is not a microscope" LOL but yea, maybe its capable lol hopefully you guys would know
TIA

 

[JBen]

Tube wont help "alot" in the first case because your already up against the glass.
Tubes reduce any len's inherant MFD..So while a tube would allow you closer....the glass is in the way. There are limits to everything and from what I can tell your little red bugs are beyond limits unless you can get the front of your lens extremely close.

If you want to play around with close up photography (your GFs eye) adding a tube will allow you get closer than without the tube, and thus fill more of the frame.

You could try a 1.4 TC which increases the magnification, but they arent cheap (Canon name brand) will reduce light a fair bit, will make focusing a hair trickier and will degrade IQ slightly. Anytime you add glass there is a price to things. Sometimes its marginable and sometimes not.

 

[Allmost]

thanks alot once again for your great help.

would these be of lower quality ?
http://www.henrys.com/4139-KENKO-EXT-TUBE-SET-CANON-EOS.aspx

the KENKO tube set, for canon.

I saw the Canon one in store, I Think it was close to same price, but just one tube.

thanks again

 

[BlueCorn]

I use Kenkos. Extension tubes have no optics. Since Canon "air" isn't inherently sharper than anyone else's its the brand I recommend.

It still won't get you any better magnification if you're already up against the glass.

 

[JBen]

I have the Kenko tubes as well. As Beerguy said, tubes are just that...A tube with no optics. Mounting a tube does two things.
1) Reduces your MFD.
2) Because it's increasing the distance between your lens and sensor it behaves a bit like a moving a projector. The further from the screen (sensor), the larger the image on the screen. But that affect is relatively minor.

tube length / focal length.

Thus 50mm tubes in front of a 100mm lens will increase image size .5

 

[Recty]

I used Opteka tubes, I'm sure their air works as well as Kenko's does.

My only complaint about the Opteka tubes is they just feel cheap when hooking onto the camera body. They dont slide as well when twisting them to locked position as a regular lens does. I dont know if Kenko has that issue or not, it isnt a big deal but it's a little annoying.

And no, tubes wont cure red bugs