TC on Canon 85mm 1.8

limbik

I know the Canon TC won't work, but I'm curious to see what happens when say a 1.4x is applied to this lens.

Steve Cavigliano

limbik wrote:

I know the Canon TC won't work, but I'm curious to see what happens when say a 1.4x is applied to this lens.

I was curious too. So when my sports fan daughter came home for a few weeks, we went to see a playoff hockey game. Knowing I couldn't get my 70-200 in (the ol' 6 inch rule :-( I decided to bring the 85 F1.8 attached to the Tamron 1.4X TC. With upperdeck seats (behind the netting I might add) and the 85's propensity for purple fringing (lots of high contrast edges with that white background :-( I figured this has got to be a worst-case test.

It was.......lol When play was at our end the results were decent. But the DOF was way shallower than what I see shooting basketball and the corners, using this lens, are always a bit soft anyway.

Bottomline. The results weren't awful, but they weren't what I know I can get from my 70-200 with this TC attached. BTW, AF worked just fine. Barely a slowdown

Give me a few hours and I'll post some originals and some crops. You can then judge for yourself.

Steve

Mongrel

Possible answer...
to the "6" rule?

Canon EF 200 f/2.8L with the 1.4x TC?

The 200 is just a hair over 6" with the caps in place, so take them off

Of course, you would be at f/4.0 so....

Better alternative (ie-more expensive...), would be the 135mm f/2.0L and TC. Gives you f/2.8 and better range than the 85.

limbik

Mongrel wrote:

Better alternative (ie-more expensive...), would be the 135mm f/2.0L and TC. Gives you f/2.8 and better range than the 85.

Well yes, but I just happen to have an 85 1.8 and very little $$

Pezpix

Ok, ok, since you begged, I'll go test it! Brb with some conclusions for you

Steve Cavigliano

Awwww man :cry I was so "not thrilled" by the above mentioned shots, that I reformatted the CF without uploading the originals I just post processed a few right from my reader. All I have is 800x600's. Which I guess is better than nothing, eh?












All shot between F2 and F2.5 @ ISO400.

I hope this helps a little

Steve

limbik

Well, it confirms nothing really bad will happen...

Pezpix

Ok, here's the infamous purple fringing at its worst. Settings were as follows

85 1.8 and 1.4x
ISO 100 1/1600 shutter



Here it is cropped



You can check the second image at a higher resolution on my site
http://www.pezpix.com/gallery/1517226/1/72856422

limbik

Wow, thanks Pez! That is not as bad as I expected at all.
What TC are you using?

Pezpix

limbik wrote:

Wow, thanks Pez! That is not as bad as I expected at all.
What TC are you using?

Whoops, forgot to mention it. My bad. I'm using the Tamron flavored 1.4 extender for that shot. I have the Canon 1.4 extender as well as the 2x but they are not accessible at the moment. But, I can tell you it (Tamron extender) does perform pretty fairly considering. The focus hunting is a bit of a lag with the Tamron setup, but all in all, it was very satisfactory.

limbik

Anybody know if this will work with the Kenko 1.5x Teleplus TC?