teleconverter less vignetting

[chikeang]

Hello
wich teleconverter has less vignetting and the pictutre more clear in corner ? from 1.5x to 2x
thank



chikeang
mtl

[BudMan]

Go Here,

http://kazutoku.cside21.com/G1andG2/telewide_eng.htm
He shows the LD20T and it is either the same as the KNT-20 or the KNT is a US or improved version. Look the whole page over.

I have a Kenko KNT-20 in route to me right now.

[DNHayashida]

Less vignetting will be with the Canon TC-DC58 (1.5x) or the TC-DC58N (1.75X). They are both 58mm at the camera end and will vignette less. There is a 58mm 2.0X teleconverter, the Century Optics DS-20TC-58 2.0X. Only problem is it's $400.00

The Kenko KNT-20 does not viginnette at full zoom. The Canon TCs allow you to zoom back a little bit before it viginnettes. Viginetting is not as big a problem in digital photography as in film photography. With digital, if you have a little viginetting you can crop it out using Photoshop or something similar before you print it.

Darryl Hayashida

[BudMan]

I have the G2 with a LenMate tube and the KNT-20. It's objective lens is 67mm.
Looking through the optical view finder will challenge you. The big end of the KNT is in there a good bit. The crown is a tad under center at full wide and centered at full. Basically I do not like aiming with LCD viewfinders and have ignored them in the past except for reviewing. It's going to be a different story now.
Vignetting. I'll need some help on this one. It's there from full wide and gone with 6 or 7 flicks of the zoom lever, leaving 4 or 5 more optical zoom settings before it wants to go to digital. I say 6 "or" 7 because it seemed to vary. This was at white walls. At 6 or 7 the vignetting was hard to pick up. The help I need is if anyone knows the optical increments of my so called flicks of the lever.
In my humble opinion this is a specialty piece of equipment and to be used as such. Not to be left on to do all things, indoor stuff is just not applicable. Excellent quality for price. At full optical zoom the images were sharp. It hides the internal flash on the lower right of the image a bit more than the Tube alone. I have the 420EX to cover my indoor flash work.
My Only Con is: I need a tube that is threaded to 46.5mm on body end and 52mm on the lens end. When I want to take the KNT off I don't know if the step ring will stay on the tube or the KNT. I tried several different tightness' and it remained unpredictable. I want it to stay on the KNT so I can quickly put my 49mm filter on the tube. Any ideas?

[DNHayashida]

budman wrote:
My Only Con is: I need a tube that is threaded to 46.5mm on body end and 52mm on the lens end. When I want to take the KNT off I don't know if the step ring will stay on the tube or the KNT. I tried several different tightness' and it remained unpredictable. I want it to stay on the KNT so I can quickly put my 49mm filter on the tube. Any ideas?



Depends on how permanent you want it. A couple drops of super glue would make it stay on.

If you decide to do this make sure you have plenty of ventilation. Super glue gives off fumes that will stick to the lens. Give it 24 hours before you put it back on your camera. If you put it back on too soon you will trap the fumes between the TC and the camera and probably fog your lens.

Darryl Hayashida

[BudMan]

Thanks, But I already used some removable loctite. I very carefully applied it to the threads with a match-stick and let it wick into the grooves of the Kenko. Then I tightened step ring firmly with a black rubber glove on. It's doing fine.