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Canon EOS Crop Sensor for HD
APS-C sensor cameras including the 80D, 70D, 7D Mk. II, 7D, EOS M and Rebel models for HD video recording.


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Old January 21st, 2010, 09:04 AM   #1
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lens too fast ??

Hi,
I have already a 7D and I use my old nikon primes on it.
Now I will be buying another 7D and maybe with original canon lenses.

Everybody is saying the best is the 1.2, but do you film a lot on f1,2 ?
I do a lot of wedding reports and sometimes f1,4 is already too shallow.
Which lens do you suggest ?
The f1,2 is too expensive, so what do you think about the 50mm f1.8 ?
Is that a good alternative ?
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Old January 21st, 2010, 10:26 AM   #2
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I was close to buying the Canon 50mm f1.2 but decided to settle on the 50mm f1.4 instead. I was using a friends f1.8 which was ok but the 1.4 was the one for me. The 1.2 got such bad reviews, it was a no brainer (for me).
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Old January 21st, 2010, 10:55 AM   #3
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I would have to say, go for the 1.4, you will have over all happiness with that one, the 1.8 has its moments and the 1.4 is at a reasonable price too
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Old January 21st, 2010, 07:50 PM   #4
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Quote:
Originally Posted by Bart Wierzbicki View Post
Hi,
The f1,2 is too expensive, so what do you think about the 50mm f1.8 ?
Is that a good alternative ?
No, it's terrible. The manual focus ring is not a ring at all, but an instrument of torture sent by Canon to punish those who focus manually. The Canon 50mm f/1.4 is OK, but the Sigma 50mm f/1.4 is better still.
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Old January 22nd, 2010, 09:25 AM   #5
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Hello Bart, could you tell us what adaptor are you using for your nikon lenses? and how do they work on the 7D?

Thanks
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Old January 22nd, 2010, 05:46 PM   #6
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Hey Manuel,
I have the adapter from Cinevate (Cinevate: DSLR Rigs, Camera Sliders, Follow Focus and More).
It's kinda cheap and I think it's good value for money.
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Old January 26th, 2010, 04:25 PM   #7
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Get the Sigma 30mm 1.4 or even better, the Canon 24mm 1.4.

1.4 is almost a full stop faster than 1.8 and with a wider lens, your DOF won't be as shallow.

Here's a great online resource for calculating the DOF for any camera or lens combination:

Online Depth of Field Calculator
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Old January 26th, 2010, 04:54 PM   #8
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1.4 is almost a full stop faster than 1.8
Uhhh, what?
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Old January 26th, 2010, 07:17 PM   #9
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The difference between 1.8 and 1.4 is 2/3 of a stop. Do you disagree with that?
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Old January 26th, 2010, 07:36 PM   #10
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The difference between 1.8 and 1.4 is 2/3 of a stop. Do you disagree with that?
Ohg my goodness.... you're absolutely right... my mistake.
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Old January 26th, 2010, 09:57 PM   #11
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I've seen your posts around, Perrone, and I know you're a knowledgeable guy. You had me second guessing myself. :)

So, to reiterate, Bart: Get something fast and wide. And yes, there's a big difference between 1.8 and 1.4. At 1.4, 67% more light is reaching the sensor.
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