Extenders: Help please I am looking at purchasing a Canon extender to use with my 100-400L IS USM lens my question is 1.4X or 2.0X and also the II generation or the III between $100.00...

Straightshooter Loc: Edmonton AB

Help please I am looking at purchasing a Canon extender to use with my 100-400L IS USM lens my question is 1.4X or 2.0X and also the II generation or the III between $100.00 - $150.00 more

Xantoz Loc: Delaware

I have the newest III and 2x I love it on my 100-400 sometimes it links up. Sometimes it does not. I also stack it with a promaster 2x it will register the canon in the data. Not the promaster. I get a reading of 800mm on the focal length but totally manual operation. And fun to work with.

CAM1017 Loc: Chiloquin, Oregon

Straightshooter wrote:

Help please I am looking at purchasing a Canon extender to use with my 100-400L IS USM lens my question is 1.4X or 2.0X and also the II generation or the III between $100.00 - $150.00 more

Save your money. Even Canon does not really recommend using extenders with this lens. You lose auto focus in most situations and when it does operate its slow and hunts back and forth. Image quality suffers. Had a 1.4 Canon and finally sold it. :thumbdown:

imagemeister Loc: mid east Florida

If want to TRY an extender, 1.4X will be the most practical for this lens. AF will be poor or non-existent, so figure manual focusing. If you want to save a bunch of money - I recommend the Tamron SP 1.4X .

KB Loc: Tennessee

The Canon website will indicate if the "III" is compatible with the 100-400mm lens. I use a Canon 1.4 II with good results. The focusing mode is MF mode as explained in the lens' manual.

Straightshooter Loc: Edmonton AB

Xantoz wrote:

I have the newest III and 2x I love it on my 100-400 sometimes it links up. Sometimes it does not. I also stack it with a promaster 2x it will register the canon in the data. Not the promaster. I get a reading of 800mm on the focal length but totally manual operation. And fun to work with.

Thanks for the info loosing auto focus is not a problem at this point my eyesight is still good

Straightshooter Loc: Edmonton AB

CAM1017 wrote:

Straightshooter wrote:

Help please I am looking at purchasing a Canon extender to use with my 100-400L IS USM lens my question is 1.4X or 2.0X and also the II generation or the III between $100.00 - $150.00 more

Save your money. Even Canon does not really recommend using extenders with this lens. You lose auto focus in most situations and when it does operate its slow and hunts back and forth. Image quality suffers. Had a 1.4 Canon and finally sold it. :thumbdown:

Would the image quality suffer if the focus was correct?

Straightshooter Loc: Edmonton AB

KB wrote:

The Canon website will indicate if the "III" is compatible with the 100-400mm lens. I use a Canon 1.4 II with good results. The focusing mode is MF mode as explained in the lens' manual.

Yes according to Canon it is that is not the issue,the issue is 1.4 or 2.0 and then the II or the III

Thanks for the advice on wheter it will work or not

Straightshooter Loc: Edmonton AB

Thank you to all for your advice and help
I read this forum every day without fail there is so much information here, it is unbelievable

Swamp Gator Loc: Coastal South Carolina

Although It's on a different lens I use a Canon 1.4 III extender every day on my 300 f4 with what I feel are excellent results.
I need AF for fast subjects such as BIF so my best choice was the 300.
IQ is excellent with the extender and I have been very happy with it.

For many examples of wildlife photos virtually all taken with a 1.4 feel free to check out my blog which is updated daily.

http://phillanoue.com

Straightshooter Loc: Edmonton AB

Swamp Gator wrote:

Although It's on a different lens I use a Canon 1.... (show quote)

CAM1017 Loc: Chiloquin, Oregon

CAM1017 wrote:

Straightshooter wrote:

Help please I am looking at purchasing a Canon extender to use with my 100-400L IS USM lens my question is 1.4X or 2.0X and also the II generation or the III between $100.00 - $150.00 more

Save your money. Even Canon does not really recommend using extenders with this lens. You lose auto focus in most situations and when it does operate its slow and hunts back and forth. Image quality suffers. Had a 1.4 Canon and finally sold it. :thumbdown:

The September 2012 issue of Outdoor Photographer has a very good article on Teleconverters that pretty much gives the straight scoop on them. It should be required reading before purchasing one.

Straightshooter Loc: Edmonton AB

Thanks a lot I will check it out

imagemeister Loc: mid east Florida

Straightshooter wrote:

quote=CAM1017 quote=Straightshooter Help please ... (show quote)

In theory you will loose something - can you or I SEE the difference ?? - and even if we could - would it really matter ?
ALL my wildlife images are done with 1.4 or 2X extenders - see my sites on FineArtAmerica.com or MyParkPhotos.com under Larry Nieland for my images ..............

CAM1017 Loc: Chiloquin, Oregon

imagemeister wrote:

quote=Straightshooter quote=CAM1017 quote=Strai... (show quote)

I have never had a problem seeing the quality difference with or without extenders. I think it depends on your personal standards and vision. :roll: