Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 22 Dec 2009 (Tuesday) 20:18
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

If the 24L, 35L, & 50 f/1.4 all have the same constant max aperture...

 
KRUSH
Goldmember
Avatar
1,257 posts
Joined Aug 2009
     
Dec 22, 2009 20:18 |  #1

What is lacking in the 50mm f/1.4 that doesn't qualify it as an L lens when the 35mm and 24mm have the same max/constant aperture? I realize that the 50mm FL has the 1.2 max aperture lens that is an L and even the older 1.0.

I guess the same question can be asked about the 85mm FL to a certain degree. Although, there are no other L lenses with the 1.8 max/constant aperture to compare it to.

Now, the 135L is technically slower than the 50 f/1.4 and the 85 f/1.8. However, it qualifies for the red ring. How is that?

Just something that I have been pondering for a while.
Can anyone offer any additional information? I apologize if this information is posted somewhere else, but I did a search and came up empty.

Thanks,
-KRUSH


The presence of the observer changes the nature of the observed...
Canon EOS 5D Mk II | Gear List & Feedback
For Sale: Canon S5 IS |

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
KCMO ­ Al
Goldmember
Avatar
1,115 posts
Likes: 1
Joined Sep 2006
Location: Kansas City, MO
     
Dec 22, 2009 20:23 |  #2

L designation has nothing directly to do with max aperture. It's build quality and composition of the glass used that gives the L designation. Generally they will have larger max apertures than lenses of the same focal length. For the 50 f/1.4 to be designated L it would probably have to be dust/moisture resistant and contain UD or aspherical elements. This is why they are considerably more expensive.


Film: Leica M-4, Elan 7E, Rolleiflex 2.8f, Pentax 645 -- Digital: Canon Pro-1, EOS 5D Mk III
EOS Lenses: Sigma 24-70 f2.8 EX - Canon EF 17-40 f4.0L - Canon EF 24-105 f4.0L - Canon EF 35 f1.4L USM - Canon EF100-400 f4.5-5.6L IS USM - Canon EF100 f2.8 Macro - Other stuff: MR 14EX - 430EX - 580EXII - ST-E2 - TC1.4x - TC-80N3

  
  LOG IN TO REPLY
JayStar86
Goldmember
Avatar
3,531 posts
Likes: 1
Joined Oct 2009
Location: VanCity, BC
     
Dec 22, 2009 20:25 |  #3

well its kind of like the Sigma 50mm F1.4 HSM lens costs more than the Canon equivalent.... it just is!

"L" series has more to do with build quality and overall quality of the lens more than anything IMO.... Its just like Canon 17-55 F2.8 IS lens cost an arm and a leg and even matches "L" series lens in IQ but it is not an "L" lens because it has inferior build quality, no weather sealing, etc.


---Jay---
Gear and Feedback
flikr (external link)

  
  LOG IN TO REPLY
JayStar86
Goldmember
Avatar
3,531 posts
Likes: 1
Joined Oct 2009
Location: VanCity, BC
     
Dec 22, 2009 20:26 |  #4

haha, KCMO Al just beat me to it with his post!^^^^


---Jay---
Gear and Feedback
flikr (external link)

  
  LOG IN TO REPLY
nicksan
Man I Like to Fart
Avatar
24,738 posts
Likes: 53
Joined Oct 2006
Location: NYC
     
Dec 22, 2009 20:27 |  #5

KCMO Al wrote in post #9248199 (external link)
L designation has nothing directly to do with max aperture. It's build quality and composition of the glass used that gives the L designation. Generally they will have larger max apertures than lenses of the same focal length. For the 50 f/1.4 to be designated L it would probably have to be dust/moisture resistant and contain UD or aspherical elements. This is why they are considerably more expensive.

That's not always true.
There are several L primes that aren't sealed. (24L, 35L, 85L...and 135L even)

Well, once can safely assume any new L that comes out in the future will be sealed...(such as the 24L MKII) :D




  
  LOG IN TO REPLY
dbdors
Goldmember
Avatar
1,001 posts
Likes: 2
Joined Oct 2007
Location: Houston, Texas USA
     
Dec 22, 2009 20:33 |  #6

In addition to what has already been said, the L glass typically has special elements, like ground glass asphericals, UD (ultra low dispersion) glass and or flouite elements, etc.

The Block diagrams at the canon camera museum can explain it better:
24L (external link)
35L (external link)
50/1.4 (external link)
and for reference
50L 1.0 (external link)


Darrell
My SmugMug Nature/Landscape Gallery (external link)
Gear List

  
  LOG IN TO REPLY
JeffreyG
"my bits and pieces are all hard"
Avatar
15,540 posts
Gallery: 42 photos
Likes: 616
Joined Jan 2007
Location: Detroit, MI
     
Dec 22, 2009 20:39 |  #7

Canon does not have one specific set of features that make an lens an 'L' but there are several that are found in some combination on most:

Constant aperture zooms

Fast aperture for focal length (note that f/1.4 is not especially fast for a 50mm lens, while f/2 is fast for a 135mm lens and crazy fast for a 200mm lens. This is one reason the 50/1.4 is not an L).

Build level including weathersealing (another reason the 50/1.4 is not an L, and while the build of the 28/1.8 and 85/1.8 are nice they are not as nice).

Ring USM (another reason the 50/1.4 is not an L)


My personal stuff:http://www.flickr.com/​photos/jngirbach/sets/ (external link)
I use a Canon 5DIII and a Sony A7rIII

  
  LOG IN TO REPLY
KRUSH
THREAD ­ STARTER
Goldmember
Avatar
1,257 posts
Joined Aug 2009
     
Dec 22, 2009 21:07 |  #8

JeffreyG wrote in post #9248274 (external link)
Ring USM (another reason the 50/1.4 is not an L)

Now, is there a difference between Ring USM and just USM?


The presence of the observer changes the nature of the observed...
Canon EOS 5D Mk II | Gear List & Feedback
For Sale: Canon S5 IS |

  
  LOG IN TO REPLY
dbdors
Goldmember
Avatar
1,001 posts
Likes: 2
Joined Oct 2007
Location: Houston, Texas USA
     
Dec 22, 2009 21:14 |  #9

There's two types of USM, Ring usm and Micro Motor usm. All the Ring USM lenses will be FTM (Full Time Manual) focus. All the micro-motor USM will not be FTM with the exception of the 50/1.4 It is the only micro-motor USM with FTM. Most of the small USM lenses (read "cheaper") will have Micro Motor.

There's better explanations out there I'm sure, but this will give you the basics: http://www.canon.com …museum/tech/roo​m/usm.html (external link)
And one more with even more detail http://photonotes.org …inner-faq/lenses.html#ftm (external link)


Darrell
My SmugMug Nature/Landscape Gallery (external link)
Gear List

  
  LOG IN TO REPLY
dbdors
Goldmember
Avatar
1,001 posts
Likes: 2
Joined Oct 2007
Location: Houston, Texas USA
     
Dec 22, 2009 21:16 |  #10

Here's another USM type explanation: http://kwc.org …2005-04-19.canon_usm.html (external link)


Darrell
My SmugMug Nature/Landscape Gallery (external link)
Gear List

  
  LOG IN TO REPLY
nicksan
Man I Like to Fart
Avatar
24,738 posts
Likes: 53
Joined Oct 2006
Location: NYC
     
Dec 22, 2009 22:49 |  #11

And of course just because a lens has ring USM, doesn't mean they can focus very fast...i.e. 50L & 85L. :lol:




  
  LOG IN TO REPLY
mrfourcows
Goldmember
Avatar
2,108 posts
Likes: 1
Joined May 2006
Location: london
     
Dec 23, 2009 05:56 |  #12

JeffreyG wrote in post #9248274 (external link)
Canon does not have one specific set of features that make an lens an 'L' but there are several that are found in some combination on most:

i'm just going to be picky here: :p

JeffreyG wrote in post #9248274 (external link)
Constant aperture zooms

there are 2 current L zooms that are not constant aperture - 28-300L and 100-400L.

JeffreyG wrote in post #9248274 (external link)
Fast aperture for focal length (note that f/1.4 is not especially fast for a 50mm lens, while f/2 is fast for a 135mm lens and crazy fast for a 200mm lens. This is one reason the 50/1.4 is not an L).

what about when a non-L has a larger aperture than a L?
case in point: 100/2 vs 100/2.8 L IS

JeffreyG wrote in post #9248274 (external link)
Ring USM (another reason the 50/1.4 is not an L)

not including non-modern Ls, this point seems pretty convincing. BUT, what about the tse 24L II?

i guess the bottom line is that no one really knows what makes canon decide whether a lens is a L or non-L.


gear | flickr (external link)

  
  LOG IN TO REPLY
egordon99
Cream of the Crop
10,247 posts
Likes: 3
Joined Feb 2008
Location: Philly 'burbs
     
Dec 23, 2009 07:09 as a reply to  @ mrfourcows's post |  #13

And what the heck is up with the S-L-O-W 800mm f/5.6? I mean, if I'm paying $12K for a lens, it should be faster than the kit lens.




  
  LOG IN TO REPLY
datadump
Goldmember
Avatar
1,932 posts
Joined Oct 2007
Location: Canada
     
Dec 23, 2009 07:37 |  #14

generally L's -> build quality, glass, some are environment sealed (ex 50L is), AF motor accuracy...
having said that, L lenses aren't without flaws (some major).

besides , if your 50 f/1.4 is giving you the images you want, then why do you care about "L" badging/ring ?
but if youre ultra curious, perhaps rent a 50L and compare it with your 50 f/1.4 and see if its worth it to you.


datadump

  
  LOG IN TO REPLY
JeffreyG
"my bits and pieces are all hard"
Avatar
15,540 posts
Gallery: 42 photos
Likes: 616
Joined Jan 2007
Location: Detroit, MI
     
Dec 23, 2009 08:06 |  #15

I think people mis-read my post. To be clear, most L lenses have certain common features (a few lack some of these) like ring -USM, good build, FTM, weathersealing, metal mounts etc.

All L lenses have one or more special characteristics like these:

Very broad zoom range with relatively fast aperture (considering the zoom range and focal length):
100-400, 28-300, 24-105.

Constant Maximum Aperture zoom.
16-35, 24-70, 24-105, 17-40

Fast for focal length.
24L, 35L, 50L, 85L, 135L, 200/2.8L, 200/2L etc etc)
f/1.4 is really fast for a 24mm lens. It is only so-so for a 50mm lens.
And as noted above, f/5.6 is really fast for an 800mm lens (or even a 400mm lens).

Difficult and special wide angle coverage:
14L, TS-E 17L, TS-E 24L - These lenses have a very difficult job to cover a 35mm sensor.

Finally - special macro features
180L, 100L - combination macro and hybrid IS.


My personal stuff:http://www.flickr.com/​photos/jngirbach/sets/ (external link)
I use a Canon 5DIII and a Sony A7rIII

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

2,965 views & 0 likes for this thread
If the 24L, 35L, & 50 f/1.4 all have the same constant max aperture...
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is bluezurichart
824 guests, 267 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.