If you want 100% crops it might take a while, I think my video card died in my other computer. But to give you an idea of the quality: I made that into a 13x19 print that looks great, even at nose-to-the-print viewing distances.
I'm having a little ISP problem lately and am stuck on dial-up temporarily, or I could post a sample, but the short answer is that Gino is correct, the 400/5.6 does work well with the 1.4x converter.
It will require manual focus on your 20D, unless you tape the pins.
dobro wrote:
I'm having a little ISP problem lately and am stuck on dial-up temporarily, or I could post a sample, but the short answer is that Gino is correct, the 400/5.6 does work well with the 1.4x converter.
It will require manual focus on your 20D, unless you tape the pins.
HTH,
Lee
really? what end would that be? the end of the lens goin in the tele or the end on the tele goinin in the camera mount?
What kind of risk would be taking by doing the tape trick?
I had the Canon 1.4x II for a while but didn't use it very much with my 400mm 5.6L and 20D because the maximum aperture is now at f/8 meaning it could no longer autofocus. I tried the "tape trick" but found it useless. I picked up the Tamron 1.4x non-SP that retains AF and I couldn't tell a difference in image quality in my tests. To be honest I didn't really test the corners very well but my guess is that the Canon probably performs a bit better there. The AF speed/accuracy with the Tamron is much better than taping the pins on the Canon but keep in mind there is a definitely a drop in speed/accuracy.
Personally I would forget about taping the pins. There isn't a risk as you are only taping contacts but if you are using a non-1 series body the Tamron is the way to go.
I may be mistaken but I think the new Kenko Pro 1.4x DG can AF pretty well (comparable to the Tamron) after taping the pins and has better image quality. Maybe someone here who owns one can confirm this.
Take care,
Mark
Edited by markyboy on Dec 30, 2005 at 01:10 AM GMT (Reason: typo)
You'll have to do a search here at FM...I'm not sure which pins are involved, and I know some folks say tape on one side, and some say the other. What you're doing is tricking the camera into thinking it has an f/5.6 lens on, when it has (effectively) an f/8 lens. Not all (if any) of the 3rd-party TCs need to be taped...that's one of the advantages of using them.
I've got the Canon TC, but I just manually focus!
Lee
EDIT - Looks like Mark did the searching for you while I was typing!
I had the Canon 1.4x II for a while but didn't use it very much with my 400mm 5.6L and 20D because the maximum aperture is now at f/8 meaning it could no longer autofocus. I tried the "tape trick" but found it useless. I picked up the Tamron 1.4x non-SP that retains AF and I couldn't tell a difference in image quality in my tests. To be honest I didn't really test the corners very well but my guess is that the Canon probably performs a bit better there. The AF speed/accuracy with the Tamron is much better than taping the pins on the Canon but keep in mind there is a definitely a drop in speed/accuracy.
Personally I would forget about taping the pins. There isn't a risk as you are only taping contacts but if you are using a non-1 series body the Tamron is the way to go.
I may be mistaken but I think the new Kenko Pro 1.4x DG can AF pretty well (comparable to the Tamron) after taping the pins and has better image quality. Maybe someone here who owns one can confirm this.
Take care,
Mark
Edited by markyboy on Dec 30, 2005 at 01:10 AM GMT (Reason: typo)...Show more →
I have the 400 prime and the Tamron TC and I have found that the image quality does drop off when using the TC if I crop the image. However if I don't have to crop, the images are very good. Also, focus ability is not as good with the TC as without. It hunts a bit if the light is not very bright.
