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Author Topic: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4  (Read 27833 times)

zerotiu

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Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« on: May 30, 2011, 03:21:10 AM »
I want to buy a semi all around zoom lens for travelling which has good image quality. I've planned this for a long time but I still stick to the prime lens mostly  :) because I'm not sure whether 24-105 is good one or not.

I've searched this on google. I find that some people say that the bokeh quality of 24-105 is good enough but others say that it has 'spikey' bokeh. I know 24-70 f/2.8 definitely has better quality from 24-105 but the weighs will kill me slowly (950 grams?). I like to shoot from low angle, so I'll think this very carefully. I've tried the 24-70 on 60d / 550d but I never try 24-105.

Also I find this one very confusing : 'small aperture (f/2.8) will help us to take children photos. IS is useless'.
I know IS doesn't do anything to capture moving objects, but can we just increase the ISO to get faster shutter speed? I mean when it's still in a good acceptable range (ISO 200-1600 maybe).

Please share your blurry images to me. I tend to pick 24-105 because the weighs,IS,and more range but if the bokeh quality and image quality of 24-70 is very very very very very far more superior than 24-105, than I'll think about this again.

Thanks

* I will place one that I pick on 5ds (5d3  ::) )
« Last Edit: May 30, 2011, 03:24:25 AM by zerotiu »

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Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« on: May 30, 2011, 03:21:10 AM »

Flake

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #1 on: May 30, 2011, 04:05:28 AM »
Both of these lenses are designed for FF cameras, the short end on a crop camera is not wide angle, but there's another drawback.  On FF f/2.8 is just about fast enough to begin developing a bokeh on crop it's never going to develop like a fast prime will, obviously the F/4 is worse.

Photozone shows examples of the Bokeh of each lens it tests so it's worth a visit, unfortunately they didn't start including it on the crop tests so you'll have to view the FF ones.

Not saying where in the world you are going to, and at what time of year makes a reccomend impossible!  There's a big difference between Stockholm in January & Jeddah in June!

The 24 - 70mm f/2.8 L is a fantastic lens - if you can get a good copy and there are many out there which aren't, for me though the lack of IS and an extra 35mm makes it a no brainer.  It's quite a bit cheaper too, so there's enough change to buy a 50mm f/1.8 which will develop a bokeh properly on a crop frame.  Image quality of the 24 - 70mm is better, but not massively so I'd be more concerned about losing the wide angle  though and the 17 - 55mm EF-s IS f/2.8 is worth considering, Sigma do a very good competitor which would save you some money, do consider those.

zerotiu

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #2 on: May 30, 2011, 04:23:08 AM »
I will put 24-70 or 24-105 on FF body, please ignore the crop body things.

I know that we can't compare the bokeh quality on crops sensor vs FF. FF body has shallower DOF, bigger sensor, and more vivid. That's why I want to change to FF body.

and yes, I've had 50mm and 85mm ( f/1.8 ) and I'm sure I'll change to prime lens when I want to take portrait shoot
« Last Edit: May 30, 2011, 04:33:38 AM by zerotiu »

Cornershot

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #3 on: May 30, 2011, 04:32:24 AM »
Bokeh is going to be better on the 24-70 but a more important thing to consider is how you want to use the lens. Are you shooting a lot of night, indoor, low light shots? Or are you mainly shooting in the bright day? The 24-70 is going to give you better all around, all condition performance but the 24-105 is going to give you that added zoom. You can just get the former and also carry a long prime like a 100 f2, which is pretty light and relatively cheap.

zerotiu

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #4 on: May 30, 2011, 04:42:57 AM »
Bokeh is going to be better on the 24-70 but a more important thing to consider is how you want to use the lens. Are you shooting a lot of night, indoor, low light shots? Or are you mainly shooting in the bright day? The 24-70 is going to give you better all around, all condition performance but the 24-105 is going to give you that added zoom. You can just get the former and also carry a long prime like a 100 f2, which is pretty light and relatively cheap.

I want to say that if I need the best image quality, I'll switch to prime lens (even 24-70 can't beat the sharpness of prime lens, can it?  :-* )

I will use the lens (24-70 or 24-105) for travelling, shooting group indoor (if it is portrait, again I'll switch to 85 or 50).

The main idea is :  Is 24-105 has the worst bokeh quality if it is compared with other zoom lens? Is the bokeh quality unacceptable?

that's why I like to see example images of 24-105 f/4 vs 24-70 f/2.8  (the other forum show this comparison on a crop body, so it's different, I can't use it as a standard)

I appreciate all images which are shared  :)

Flake

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #5 on: May 30, 2011, 05:49:51 AM »
You haven't looked at Photozone have you?

The Canon EF 24-105mm L is capable of producing a pleasing bokeh for a zoom lens. The circular out-of-focus highlights show a slight halo effect at 105mm f/4. Stopping down to f/5.6 reduces the effect but it's not overly worrisome anyway. The out-of-focus blur is very smooth and nothing to worry about (at 105mm). However, regarding its rather moderate max. aperture the 24-105mm L isn't really suitable for shallow depth-of-field applications.

The EF 24-70mm is a comparatively "fast" lens thanks to its max. aperture of f/2.8. It's surely not as capable as tele prime lenses but you can achieve a quite shallow depth-of-field specifically at 70mm so let's have a look at the bokeh (out-of-focus) quality now.
The background blur is very smooth and buttery resulting in a very pleasing bokeh in many "mainstream" scenes. However, the foreground blur isn't quite as harmonious. Out-of-focus highlights show a near circular shape at large aperture settings but the inner zone of these "discs" is quite busy/nervous (see also the "meadow" in the sample image section). All-in-all the bokeh may not be flawless but it's still decent for a standard zoom lens (such lenses are rarely perfect here).

It used to be the case that prime lenses were better than primes, however now this is just an outdated myth, lenses like the 70 - 200mm f/2.8 IS L MkII will outperform most of the primes in its focal length and equal the others.  Computer design has led to huge improvements in the quality of zoom lenses, the problem in Canons range is that most of the primes are rather elderly designs, and one of the issues they really don't perform well is the corners & borders on FF.  A certain native sharpness is sufficient, it really doesn't matter is one lens is sharper than another you have the unsharp mask to equalise this.  If you really do want sharpness don't buy a 5D MkII !  buy a Lecia M8.

It might be said that there is a line in the sand as to what level of quality is acceptable, any more than this is vanity for pixel peepers.  No one else in reality is going to say Oh look at the quality of that lens!  You will be remembered for quality of the photographs you produce and not the quality of the equipment you use!

zerotiu

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #6 on: May 30, 2011, 08:21:39 AM »
my bad, I didn't see the next page button.

You guys help me a lot, maybe I will stick to 24-105 1st. 4/3 cameras have better image quality  after I've read, but DSLR is more fast and versatile with the continous shoot

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #6 on: May 30, 2011, 08:21:39 AM »

YoukY63

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #7 on: May 30, 2011, 10:20:34 AM »
Here is a sample of 24-105 f/4L bokeh (on 5DmII).

In my opinion this zoom lens produces a very nice bokeh (for a zoom ;) ).


IMG_5248 par YoukY63, sur Flickr
Canon 5D MkII + 24-105mm f/4L + 70-200mm f/4L IS + 35mm f/1.4L + 85mm f/1.2L + 135mm f/2L + Sigma 50mm f/1.4EX + Samyang 14mm f/2.8

Flake

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #8 on: May 30, 2011, 12:09:36 PM »
Sorry Youky but that image doesn't show any Bokeh, it's mildly out of focus.  Unfortunately the image doesn't include any Exif data, but I suspect you shot this around f/5.6 - 6.3 ?

neuroanatomist

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #9 on: May 30, 2011, 12:09:57 PM »
I find the 24-105mm to be a very versatile lens on FF as a general purpose zoom.  It does manage to produce a decent bokeh, too.  Here are a couple of additional examples:


EOS 5D Mark II, EF 24-105mm f/4L IS USM @ 105mm, 1/60 s, f/4, ISO 400


EOS 5D Mark II, EF 24-105mm f/4L IS USM @ 105mm, 1/125 s, f/4, ISO 400
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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #10 on: May 30, 2011, 12:24:16 PM »
I find the 24-105mm to be a very versatile lens on FF as a general purpose zoom.  It does manage to produce a decent bokeh, too.  Here are a couple of additional examples:


Beautiful children.  They'd look great with any camera!!

zerotiu

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #11 on: May 30, 2011, 12:50:28 PM »
wow...lovely :)

@neuro , I do believe that you have 24-70 as well, can you share the image results ?

Cornershot

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #12 on: May 30, 2011, 02:48:14 PM »
Here's an example from a 24-70. f2.8 at 2000/sec.



« Last Edit: May 30, 2011, 02:52:30 PM by Cornershot »

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #12 on: May 30, 2011, 02:48:14 PM »

Mencho(22)

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #13 on: May 30, 2011, 08:01:04 PM »
Here are some examples of the 24-70mm











« Last Edit: May 30, 2011, 08:35:55 PM by Mencho(22) »

neuroanatomist

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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #14 on: May 30, 2011, 09:09:31 PM »
wow...lovely :)

@neuro , I do believe that you have 24-70 as well, can you share the image results ?

Thanks!   :D

Sorry, but I don't have the 24-70/2.8.  I do have the 16-35/2.8 II and the 70-200/2.8 IS II.  Since I have the very capable 24-105, and excellent primes for portraits (85/1.2 II, 135/2) and low-light situational shooting (35/1.4), I've been holding out for an IS version of the 24-70 (i.e. I don't really need it - still might end up with the current one if no refresh occurs...). 
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Re: Bokeh comparison 24-70 f/2.8 vs 24-105 f/4
« Reply #14 on: May 30, 2011, 09:09:31 PM »