Incense

by Bart Arondson

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

Take the 2-minute tour ×
Photography Stack Exchange is a question and answer site for professional, enthusiast and amateur photographers. It's 100% free, no registration required.

I am planning to buy a Canon EF 300mm f/2.8 L IS II soon, probably in the first half of next year. I plan for it to be my wildlife and birding lens, and with the 1.4x and 2x Mark III teleconverters from Canon, I'll also have 420mm and 600mm focal lengths. I'm a little bummed Canon does not make their own 1.7x TC, which would also give me a 510mm focal length at f/4.75 (not sure if that translates to f/4.5 or f/5 in actuality).

Are there any quality third-party 1.7x teleconverters that will work with the EF mount? I am interested in center to corner performance, however in the case of birds at 510mm if the corners are a little soft that would probably be ok.

share|improve this question
    
Have fun with the lens... :) I went looking to see if Vivitar made a 1.7x TC, but they don't. I have one of their modern 2x and it's very decent though no longer useful to me since it's K-mount and, hopefully, sold on Monday. Wish I could help. –  John Cavan Nov 19 '12 at 0:39

1 Answer 1

up vote 3 down vote accepted

The third generation Canon extenders perform very will with the 300 f/2.8L IS II, so much so that using the Canon 1.4x and cropping would likely produce as good an image as a third party 1.7x if one exists.

Cropping would give you the field of view and DOF of a 510mm f/4.75

share|improve this answer
1  
True, the IQ is excellent on the Mark III TC's. I've rented the 300/2.8 II recently, and used both a 1.4x and 2x TC. At 420mm it is a breeze to do BIF, however the bird tends to be very small in the frame...so it requires a LOT of cropping (and this a significant loss in IQ.) At 600mm, BIF tend to fill the frame, but it is also difficult to keep the bird in the frame. So, I was hoping to get a 1.7x TC and do BIF at 510mm, which should be a happy medium of the two other options, with more pixels on subject (and thus, better cropped IQ.) –  jrista Nov 20 '12 at 3:48

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.