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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 22 Sep 2011 (Thursday) 19:00
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Lens math question..

 
shayneyasinski
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Sep 22, 2011 19:00 |  #1

What would be wider, 24mm on a FF or 17mm on a crop??

My calculatons say 17 x 1.6 is 27 mm about ......

thanks


my gear Canon 7D, Canon 5DMK2, 70-200 f2.8 IS, 50mm f1.8, canon 430 speedlight, canon 17-55 2.8 IS, canon 100mm macro sigma 10-20, Canon 17-85 , 60 cokin filters , 2x telecoverter.

  
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krb
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Sep 22, 2011 19:02 |  #2

Your calculations are correct.


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shayneyasinski
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Sep 22, 2011 19:15 |  #3

so would 3 or so mm make a big differance?


my gear Canon 7D, Canon 5DMK2, 70-200 f2.8 IS, 50mm f1.8, canon 430 speedlight, canon 17-55 2.8 IS, canon 100mm macro sigma 10-20, Canon 17-85 , 60 cokin filters , 2x telecoverter.

  
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Todd ­ Lambert
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Sep 22, 2011 19:20 |  #4

It makes much more difference at the wide end, rather than the long end, so yes, I'd say that 3mm is a lot. Of course, your mileage may vary.




  
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wunhang
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Sep 22, 2011 19:21 |  #5

All depends on use... if you're trying to take a picture of a mural along a narrow hallway... every little amount of view helps... if you're in a field somewhere... you won't notice at all.


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frankk
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Sep 22, 2011 19:22 |  #6

shayneyasinski wrote in post #13147543 (external link)
so would 3 or so mm make a big differance?

12.5% wider. Not huge.




  
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shayneyasinski
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Sep 22, 2011 19:25 |  #7

I have both FF and Crop and only a 17-55 2.8 IS and nothing for the FF in that range other than my 50MM so it was a decision between the 24-105 and 24-70 but the 24-105 feels like a toy and distorts at 24mm so the 24-70 it is!!

thanks


my gear Canon 7D, Canon 5DMK2, 70-200 f2.8 IS, 50mm f1.8, canon 430 speedlight, canon 17-55 2.8 IS, canon 100mm macro sigma 10-20, Canon 17-85 , 60 cokin filters , 2x telecoverter.

  
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frankk
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Sep 22, 2011 19:46 as a reply to  @ shayneyasinski's post |  #8

Given your kit, I'd go for the 24-70mm. I traded my 24-105mm for the 24-70mm. My only regret was the loss of IS at the longer end until I upgraded my 100mm to the 100L. Now I have a better macro lens (100mm L) that periodically substitutes for the 70-200 in situations where the white lens is too much.




  
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DreDaze
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Sep 22, 2011 19:59 |  #9

take your 10-20mm on one of your crop cameras...go from 15-17mm...that'll be the difference


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shayneyasinski
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Sep 23, 2011 00:15 |  #10

DreDaze wrote in post #13147760 (external link)
take your 10-20mm on one of your crop cameras...go from 15-17mm...that'll be the difference


Thanks, Never thought of that...
I also never seem to think of good poses at the gig , always when I get home ..


my gear Canon 7D, Canon 5DMK2, 70-200 f2.8 IS, 50mm f1.8, canon 430 speedlight, canon 17-55 2.8 IS, canon 100mm macro sigma 10-20, Canon 17-85 , 60 cokin filters , 2x telecoverter.

  
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Lens math question..
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
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