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DPChallenge Forums >> Tips, Tricks, and Q&A >> "L" lenses to watch out for...
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 12/16/2005 07:14:57 PM · #26
i've heard of owners of both the 300L/4 IS and the 100-400L say that the prime with 1.4x is sharper than the zoom. I'd say there's no issue with the sharpness of the lens, infact i think it's one of canons very nice primes and i've only heard good things.
 12/16/2005 07:15:53 PM · #27
Originally posted by doctornick:
Review the MTF chart...The 300 f/4 IS is sharper at f/4 and at f/5.6 than the 70-300 at f/5.6...

please be reminded while it's probably true, canon's MTF charts are not real tests, they're scientific predictions.
 12/16/2005 07:17:11 PM · #28
Originally posted by kyebosh:
i've heard of owners of both the 300L/4 IS and the 100-400L say that the prime with 1.4x is sharper than the zoom. I'd say there's no issue with the sharpness of the lens, infact i think it's one of canons very nice primes and i've only heard good things.


There are NO issues with that lens...None whatsoever in everyday use...and it works great as a 420mm f/5.6 IS when used with a 1.4x TC.
 12/16/2005 07:17:30 PM · #29
The 300L f4L has Max center sharpness at f4 at 1830
The 70-300 IS has max center sharpness at (300mm) at f8 at1888



Message edited by author 2005-12-16 19:36:54.
 12/16/2005 07:19:27 PM · #30
Originally posted by doctornick:
Originally posted by kyebosh:
i've heard of owners of both the 300L/4 IS and the 100-400L say that the prime with 1.4x is sharper than the zoom. I'd say there's no issue with the sharpness of the lens, infact i think it's one of canons very nice primes and i've only heard good things.


There are NO issues with that lens...None whatsoever in everyday use...and it works great as a 420mm f/5.6 IS when used with a 1.4x TC.

don't argue with me can't you see i'm saying the 300 is good?
 12/16/2005 07:19:28 PM · #31
Originally posted by yido:
The 300L f4L has Max center sharpness at f4 at 1830
The 70-300 IS has max center sharpness at (300mm) at f8 at1888

Now who's pixel peeping.


You are...you have to shoot at f/8 I can shoot at f/4, 2 stops of light....makes the difference between getting the shot and not getting it...
 12/16/2005 07:20:23 PM · #32
Originally posted by kyebosh:
...don't argue with me can't you see i'm saying the 300 is good?


LOL, I'm not! I'm agreeing! LOL
 12/16/2005 07:30:18 PM · #33
Originally posted by doctornick:
Originally posted by kyebosh:
...don't argue with me can't you see i'm saying the 300 is good?


LOL, I'm not! I'm agreeing! LOL

my bad!!! lol
 12/16/2005 07:32:17 PM · #34
Come on lets face it neither f4 nor f8 is a fast lens for low light work. If you want a fast lens at 300 then you should be looking at the 300mm f2.8L IS ot the Sigma 120-300 EX f2.8.

Remember the 70-300 IS's widest aperature is 5.6. One stop, if you're gonna pixel peep, let's pixel peep, if you say that MTF doesn't matter, then it doesn't matter.

Message edited by author 2005-12-16 19:34:16.
 12/16/2005 07:32:57 PM · #35
wow look at the difference in distortion between those two!

and vignetting.

and CA.

Message edited by author 2005-12-16 19:36:07.
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