View Full Version : lens too fast ?? 
 
Bart Wierzbicki January 21st, 2010, 09:04 AM 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 ?  
Jay Rodriguez January 21st, 2010, 10:26 AM 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).  
A.J. Aguirre January 21st, 2010, 10:55 AM 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  
Daniel Browning January 21st, 2010, 07:50 PM 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.  
Manuel Hernandez-Stumpfhauser January 22nd, 2010, 09:25 AM Hello Bart, could you tell us what adaptor are you using for your nikon lenses? and how do they work on the 7D?  
 
Thanks  
Bart Wierzbicki January 22nd, 2010, 05:46 PM Hey Manuel, 
I have the adapter from Cinevate (Cinevate: DSLR Rigs, Camera Sliders, Follow Focus and More (http://www.cinevate.com)). 
It's kinda cheap and I think it's good value for money.  
Lance Watts January 26th, 2010, 04:25 PM 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 (http://www.dofmaster.com/dofjs.html)  
Perrone Ford January 26th, 2010, 04:54 PM 1.4 is almost a full stop faster than 1.8 
 
Uhhh, what?  
Lance Watts January 26th, 2010, 07:17 PM The difference between 1.8 and 1.4 is 2/3 of a stop. Do you disagree with that?  
Perrone Ford January 26th, 2010, 07:36 PM 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.  
Lance Watts January 26th, 2010, 09:57 PM 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.  
 
 | 
 |