Luminous Landscape Forum

Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: dreed on September 17, 2014, 08:58:40 am

Title: Canon 70-200/f4L IS USM and extenders
Post by: dreed on September 17, 2014, 08:58:40 am

Does anyone here use the Canon 70-200/f4L IS USM with either the 1.4x or 2.0x Mark III tele-converters?

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: allegretto on September 17, 2014, 12:00:09 pm

Yep

Works fine. Are you having problems?

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: dreed on September 17, 2014, 10:07:58 pm

Quote from: allegretto on September 17, 2014, 12:00:09 pm

Yep

Works fine. Are you having problems?

Considering buying and just curious what the IQ degradation is like with the 1.4x attached.

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: Slobodan Blagojevic on September 17, 2014, 10:30:49 pm

I am using it (though rarely) with 1.4 MII, as the tests at the time showed minimal degradation. I did not do my own tests, but I never noticed a problem with the images either. And it is with a Mark II, mind you.

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: allegretto on September 17, 2014, 10:36:32 pm

Have to admit I did not pixel peep, but since the perspective and mag is not the same, not sure how to interpret the results

In any case, used it extensively last week in Yellowstone on critters and if seemed very sharp… 1.4 Mk III here. IS and AF worked perfectly.

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: Slobodan Blagojevic on September 17, 2014, 11:09:32 pm

I found one example, tripod-mounted, 100% view, unprocessed and unsharpened (except for Lightroom defaults):

EDIT: Forgot to mention, that was a 10 Mpxl camera, Canon 40D

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: mhospelt on September 18, 2014, 09:20:08 pm

use 1.4 Mark II and have no problems with it. But use it more with my 24TS, crisp and sharp.

Title: Re: Canon 70-200/f4L IS USM and extenders
Post by: allegretto on September 19, 2014, 07:46:47 am

Quote from: mhospelt on September 18, 2014, 09:20:08 pm

use 1.4 Mark II and have no problems with it. But use it more with my 24TS, crisp and sharp.

Never though of using that combo. Is your shift limited?

My 50mm Schneider has such a huge image circle that at 10mm of shift it physically hits the stops on my 6D.

Could sell the 50 mm Schneider to fund other candy if it's that good

Will test this...