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TC or bigger lens


12 Jan 2010 3:34PM
I have a canon 70/200 IS USM F2.8L, shall I buy a TC1.4 or a 300L IS USM, whats best, I know the TC is cheaper, but mayb the 300mm lens would be slightly better, any views please guys. Thanks Nick

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Coleslaw e2
9 13.4k 28 Wales
12 Jan 2010 3:45PM
Since it is only 300 you are after, and you have 70-200 2.8, TC would be my suggestion.
ripleysalien e2
8 1.2k 11 United Kingdom
12 Jan 2010 4:24PM
Agree, converter all the way,
JackAllTog e2
5 4.0k 58 United Kingdom
12 Jan 2010 4:59PM
The 300mm must be the better lens - itís not a zoom.
The 300mm come in f4 & F2.8, which one were you thinking?

The TC will add more glass and reduce max aperture.
A 1.4 TC will reduce a stop of light taking the 70/200 f2.8 to f4, but 1.4 x 200 only = 280mm, could use a 2xTC but then lose 2 stops of light.
Also AF will not work with some combinations of TC and Lenses, but I think your probably OK with yours.

If you can afford it get the 300mm, shaper shots and more reach.
lawbert e2
7 1.8k 15 England
12 Jan 2010 5:15PM
Having looked at your portfolio another consideration is AF speed....
Once you attach a tc you will slow your lense's AF speed down to a snails pace.
If the 300mm your talking of is the f4 version then forget a tc as you will again lose to much AF speed and if its the F2.8 you will be able to a 1.4x pretty comfortably.
cambirder e2
11 7.2k England
12 Jan 2010 5:34PM

Quote:Once you attach a tc you will slow your lense's AF speed down to a snails pace.


Can't say I've noticed that on my 70-200 f2,8
John_Frid e2
8 514 56 United Kingdom
12 Jan 2010 5:53PM
I use a 1.4 TC with my 70-200 f2.8 and I find it works very well indeed. There is no easily noticed impairment to either AF speed or image quality - at least at the sizes I print to (A4).

Whilst I am fairly sure a quality prime 300mm (f4 or f2.8) will have the edge over the 70-200 + 1.4 TC, the question is are you prepared to shell out at least £1,000 for that edge.

If you want longer reach, then maybe the 100-400mm is worth considering. Yes it will be a further stop slower than the 70-200 + 1.4 TC, but you will gain an extra 120mm or reach. You could then add a 1.4 TC to that and have 560mm of reach (albeit at a maximum aperture of f8).

Whenever I consider these things I baffle myself with the options, and end up wondering why I didn't pick a more straightforward and less costly hobby.
lawbert e2
7 1.8k 15 England
12 Jan 2010 6:39PM
Has anyone tried a 700-200 f2.8 with a 1.4 tc attached aimed at a high speed moving subject?
In my guided opinion the Af will slow and the sharpness of the lense will drop off.
arhb e2
7 2.5k 68 United Kingdom
12 Jan 2010 6:57PM

Quote:Has anyone tried a 700-200 f2.8 with a 1.4 tc attached aimed at a high speed moving subject?
In my guided opinion the Af will slow and the sharpness of the lense will drop off.



Yes, my pf banner shot of a stooping falcon, was taken using a 70-200F4L (IS turned off), with a 1.4tc attached.
I dont remember the exact camera settings but as you can see, I nailed it.
Or did you mean something faster than a stooping falcon?
lawbert e2
7 1.8k 15 England
12 Jan 2010 7:29PM
Ok Ok....A teleconvertor attached to a 70-200 be it an f4 or f2.8 will retain the same af speed as the lens without it.
If not a tc will most certainly improve the lenses af speed.

How foolish of me to think different!!
Coleslaw e2
9 13.4k 28 Wales
12 Jan 2010 8:21PM
Have a look at Neil (Javam) PF.
He has some stunning airshow shots with 70-200 F2.8 + 2x TC (yes, 2x!).
12 Jan 2010 8:29PM
I Have used my 70-200 f2.8 with a 1.4 Extender many times and have hardly noticed any drop in AF performance.
arhb e2
7 2.5k 68 United Kingdom
12 Jan 2010 8:34PM

Quote:Have a look at Neil (Javam) PF.
He has some stunning airshow shots with 70-200 F2.8 + 2x TC (yes, 2x!).


I was also going to mention that Cole - I think this(70-200F2.8) and the 300mm F2.8 are two lenses that get very good results from the 2x tc.
KBan e2
9 468 4 England
12 Jan 2010 9:48PM
i use a Nikon 70 200 2.8 VR with a 1.7 converter for my bird shots

Keith

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