I have both Canon and Sigma lenses and a 1.4 telextender of a different make. I am interested in purchasing a better 1.4 teleconverter. Looking for comments on getting the Canon or Sigma 1.4.. I have the Sigma 150-600c and the Canon 300 F-4L.
At this time I seem to be using the Canon 300L more than the Sigma 150-600.
thanks for your comments.
Posted by Nate Chappell on July 10, 2016 at 11:09 PM
Hi John,
I think you will be using it much more on the Canon 300F4, I use a Canon 1.4x III teleconverter with it regularly and get excellent results, losing the one stop you are wide open at F5.6. I have a Sigma 150-600 lens but I wouldn't use a teleconverter with it as then you wide open you are at F9, you lose too much light and I doubt if the image quality would be very good when paired with that zoom. So whatever teleconverter you buy I would consider it a purchase for the 300F4. I am sure there are Sigma 1.4x tc's that are compatible with Canon lenses but I would probably just go ahead and spend the little bit more and buy the Canon tc if I were you.
Posted by Keith Bauer on July 11, 2016 at 10:41 AM
John:
I'll echo Nate's recommendation on going with the Canon 1.4x TC. Using it on the Sigma is probably not a good idea for the issues mentioned above, and you will probably NOT have Autofocus as you'll have an effective aperture of f/9 with a 1.4 TC.
The Canon 2.0 teleconverter works very well with the 300mm, also. Costs you two stops but you get a 600mm.
Posted by Keith Bauer on July 12, 2016 at 11:24 AM
The Canon 2.0 teleconverter works very well with the 300mm, also. Costs you two stops but you get a 600mm.
As long as you have a camera body that will autofocus at f/8. If you do not, you'll lose AF.
Posted by John Tobias on July 14, 2016 at 10:10 PM
Thanks for your comments and suggestions. I did purchase the Canon 1.4 X III have not had much chance to try it out, but did take a couple shots of a backyard cottontail. HH, Canon 300 F-4L with the 1.4. I think I will like it.
Discussion
5 repliesAt this time I seem to be using the Canon 300L more than the Sigma 150-600.
thanks for your comments.
I think you will be using it much more on the Canon 300F4, I use a Canon 1.4x III teleconverter with it regularly and get excellent results, losing the one stop you are wide open at F5.6. I have a Sigma 150-600 lens but I wouldn't use a teleconverter with it as then you wide open you are at F9, you lose too much light and I doubt if the image quality would be very good when paired with that zoom. So whatever teleconverter you buy I would consider it a purchase for the 300F4. I am sure there are Sigma 1.4x tc's that are compatible with Canon lenses but I would probably just go ahead and spend the little bit more and buy the Canon tc if I were you.
I'll echo Nate's recommendation on going with the Canon 1.4x TC. Using it on the Sigma is probably not a good idea for the issues mentioned above, and you will probably NOT have Autofocus as you'll have an effective aperture of f/9 with a 1.4 TC.
John