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Author Topic: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L  (Read 9637 times)

Mt Spokane Photography

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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #15 on: January 08, 2012, 10:46:55 PM »
I have the 35mmL and the 135mm L, both are tack sharp.  I tried a 24mm L that a friend had, and it was amazingly sharp.  Its on my list to get someday, but I don't use the 24mm focal length on my 5D MK II enough to make it a priority.


Most of the issues with the large aperture lenses tend to be front or back autofocus issues, or the use of focus and recompose.  My 35mm L was noticable sharper after adjusting the AFMA.  I sent it to canon for calibration a couple of weeks before the warranty was up, and its reasonably accurate on my 5D MK II, needed a +4 on my 7D.  Thats pretty standard.

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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #15 on: January 08, 2012, 10:46:55 PM »

neuroanatomist

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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #16 on: January 09, 2012, 11:41:09 AM »
I guess I should clarify a bit more Neuro.  I would have expected your explaination if all the test shots at f/1.8 were a little OOF than the f/1.2 shots.  In all but this one instance, the f/1.2 shot was sharper than the f/1.8 shot.  I also have to confess, I was looking at these images at 200% and I'm probably a closet pixel peeper.

Apologies, but I don't understand your clarification. Are you saying that in general, f/1.2 was sharper than f/1.8, or in one specific shot, f/1.2 was sharper, but the rest of the time, f/1.8 was sharper? 

What I'm saying is that with correct focus, f/1.8 will always be sharper than f/1.2, that's just basic optics - you stop down from wide open and the lens gets sharper.  MTF tests and/or ISO 12233 test shots, which when properly done are perfectly focused (either with 10x Live View, or better yet by focus bracketing and picking the best shot post hoc).  But, what I'm also saying is that if you are using AF for your shots, f/1.2 will usually be sharper than f/1.8, because the f/1.2 shots will be correctly focused, while f/1.8 will be back focused because of the focus shift (focus shift does not apply wide open).  However, that also assumes the lens is properly calibrated on your body - for example, if it actually front-focuses at f/1.2, then the focus shift at f/1.8 may result in correct focus (two wrongs making a right, so to speak).
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photophreek

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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #17 on: January 09, 2012, 12:40:24 PM »
Neuro - when I posted my first msg, I also could not understand why f/1.2 was sharper in one shot than f/1.8.  All my other test shots, f/1.8 was sharper.  I probably should have looked at the EXIF before posting.  The EXIF for the f/1.2 shot had a shutter speed of 1/60 and the f/1.8 shutter speed shot was 1/15.  Sorry for the misunderstanding.  Notwithstanding, I'm still going ahead with purchasing the 50L 1.2.

Axilrod

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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #18 on: January 10, 2012, 01:11:56 PM »
My weekend with the 50L has been very interesting.  I've shot many different scenarios both indoors and outside and at many different apertures.  The lens has been paired with my 7d which is my main camera body.  BTW, I'm very familiar with my 7d and it's AF system.  I don't get OOF shots unless I've had a brain fart.  Just this afternoon, I was taking a few shots of one of our cats with fill flash at f/1.2 and f/1.8.  When I was comparing the two shots in LR, I was surprised that the f/1.2 was sharper.  I understand that the 50L can be softer at f/1.2, but based on my testing, technique may have something to do with it.

I must confess that the images of this lens are very different than the other L primes I use.  It's hard to describe, but the images seem "dreamier" and not as much edge blur as the 85L II.  I use my lenses as tools to achieve a "look" in the images I photograph and the 50L has a very unique look about it unlike my other primes.  I've decided to buy the lens and I anticipate that it will find itself attached to my 7d a lot.

Congratulations!  Glad you're enjoying it.  And yes, it does very well on an APS-C sensor, it's like having an 80mm 1.2 with the minimum focusing distance of a 50L 8)
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neuroanatomist

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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #19 on: January 10, 2012, 01:25:47 PM »
...it does very well on an APS-C sensor, it's like having an 80mm 1.2 with the minimum focusing distance of a 50L

Well, it's more like an 80mm f/1.9 on APS-C...
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Re: 24mm 1.4L ii vs 35mm 1.4L vs 50mm 1.2L
« Reply #19 on: January 10, 2012, 01:25:47 PM »