TC or not TC with a 7D (1 Viewer)

C

citrinella

Well-known member

• Jul 15, 2010

• #1

If using something like a 500 f4 L IS with a 7D, is the image degradation from using a 1.4TC better or worse than not using the TC and cropping instead ?

Anybody looked at this ?

Mike.

 

Sy V

Well-known member

• Jul 15, 2010

• #2

Close call, but dependent upon the quality of the TC.

 

D

Dave Williams

Well-known member

• Jul 15, 2010

• #3

The same would apply with any camera body surely ? If cropping was always a better alternative there would be no demand for TC's.
TC's are just another means to an end.
The perfect shot for detail would be full frame with no cropping on a bare prime lens.
We all live in hope !

 

Roy C

Occasional bird snapper

• Jul 15, 2010

• #4

I have always thought that you get more detail by using a tc than you can by cropping heavier (providing that your lens takes a tc well, which usually means f4 or faster with the Canon 'L' long lenses) . I certainly believe that to be the case with my gear (300/2.8).

From everything I have read on the 500/4 it takes a 1.4tc very well with little drop in IQ. Most of the top bird snapper around use a 1.4tc with the 500/4 on a regular basis - I cannot image they would do so if they though they could do away with the tc and just crop heavier.

Just my 2p's worth Mike.

P.S. As rioja has indicated, I would not have thought that using a particular Camera body would have made any difference.

 

Last edited: Jul 15, 2010

gray38

Well-known member

• Jul 16, 2010

• #5

rioja said:

The same would apply with any camera body surely ? If cropping was always a better alternative there would be no demand for TC's.
TC's are just another means to an end.
The perfect shot for detail would be full frame with no cropping on a bare prime lens.
We all live in hope !

Click to expand...

Maybe the 7d's 18mp gives more scope for cropping than say a 40d's 10mp

 

D

Dave Williams

Well-known member

• Jul 16, 2010

• #6

gray38 said:

Maybe the 7d's 18mp gives more scope for cropping than say a 40d's 10mp

Click to expand...

I'm sure it does but the question is TC vs Cropping and the answer has to be the same whatever number of MP's you have to play with doesn't it ?

 

P

paul goode

Well-known member

• Jul 16, 2010

• #7

Can't give an answer for the 7D because I used a 1D mkIII but the quality of the images using a 500mm f4 with a Canon 1.4x tc was that good, that for me, it was a no brainer to use it pretty well all the time.
compared to the price of a 500mm f4 the tc price is a drop in the ocean, so again go for it ( I got mine free when I bought the lens )
Regarding other makes of tc, why? ........

 

GYRob

Well-known member

• Jul 17, 2010

• #8

as with most if not all lenses when you add a tc there is a drop in IQ but it is not enough to worry about on lenses like the 500f4 300f2.8 .
I think you would lose more detail cropping even on the 7d conpared to using the 1.4tc to get the same larger image size..
Rob