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Thread started 18 May 2010 (Tuesday) 08:51
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Minimum Focus Distance - Medium Length Lens

 
mitchman
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May 18, 2010 08:51 |  #1

We have a Canon 5DM2 and two lenses -the 16-35 f/2.8 and the new 70-200 f/2.8 IS II.

I would like to buy the 24-70 f/2.8 to fill the gap between these two lenses but we're waiting for Canon to release the rumored the new IS version of this lens so we can use it for video as well. So in the mean time I've been considering some other lenses.

One of the problems I always run into is minimum focus. I'm too close to something and the camera won't focus. So I've been researching the minimum focus distances of various lenses and found some interesting results:

16-35 (0.9 feet)
24-70 (1.25 feet)
70-200 (3.94 feet)

85 f/1.2 (3.2 feet)
85 f/1.8 (2.8 feet)

50 f/1.2 (1.5 feet)
50 f/1.4 (1.5 feet)

Look at how short the minimum focus is for the 24-70. Does that sound right? I got all my info from B&H Photo's website. I'm surprised that the 85 f/1.2 has almost the same minimum focus distance as our 70-200! I'm really looking at purchasing the 85mm (or maybe a 50mm) to get us by while we're waiting for the new 24-70mm.

Any advice? Comments?


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DetlevCM
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May 18, 2010 08:53 |  #2

The 24-70 is correct - I just looked at my lens - 0,38m/1,3f is what it says on it.
You can also get that from Canon's website.

I don't find anything strange about it...


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BlueTsunami
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May 18, 2010 08:54 |  #3

No opinion on the MFD of these lenses but thought this may come in handy...

http://www.mystd.de/al​bum/calculator/ (external link)

Edit: Well, the MFD of the 24-70 is pretty close to the object. At the longest end its hitting 0.32x Magnification (1:3.1 lifesize), not bad.


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Scatterbrained
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May 18, 2010 08:55 |  #4

mitchman wrote in post #10201995 (external link)
We have a Canon 5DM2 and two lenses -the 16-35 f/2.8 and the new 70-200 f/2.8 IS II.

I would like to buy the 24-70 f/2.8 to fill the gap between these two lenses but we're waiting for Canon to release the rumored the new IS version of this lens so we can use it for video as well. So in the mean time I've been considering some other lenses.

One of the problems I always run into is minimum focus. I'm too close to something and the camera won't focus. So I've been researching the minimum focus distances of various lenses and found some interesting results:

.
24-70 (1.25 feet)
...
Look at how short the minimum focus is for the 24-70. Does that sound right? ...
Any advice? Comments?

Sounds right to me. The lens actually has "Macro 1.3ft" printed on the barrel as the minimum focus distance.


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egordon99
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May 20, 2010 07:24 as a reply to  @ Scatterbrained's post |  #5

You'll find fast primes usually do not focus as close as "slow" zooms. As much as I love my 85/1.8, I don't like the long MFD. The 24-70L does really well as a closeup lens.

You're aware of how a lens' MDF plus its focal length affect the "maximum magnification" ? This is a good concept to learn.




  
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Minimum Focus Distance - Medium Length Lens
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