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Author Topic: With my 5D MK III is an f/2.8 lens really needed???  (Read 4230 times)

ryllz75

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With my 5D MK III is an f/2.8 lens really needed???
« on: November 27, 2012, 04:30:41 PM »
Hi All,

I've been mulling over this since I bought the 70-200mm f/2.8 IS II this past weekend. Not sure if its buyers remorse or rookie mistake in not realizing the capabilities of my new 5d MK III.

I currently use a 5d MK III and while using my 24-105L f/4 i noticed that  I can easily shoot dimly lit indoor scene (church wedding, night indoor events, etc.) just by bumping up the ISO to 8000-10000 and the images look very good still!  I have not notice any drastic increases in noise and even so I can get it out using software.  Now I have not tried printing these shots yet BUT even in 100% crop the images looks good.

Is there any merit to this line of thinking that f/4 lenses are good enough to use for dimly lit scnese using the 5d MK III?  Should i exchange the 70-200mm 2.8 IS II with the 70-200 f/4 IS and save the $900 difference and apply that to a 16-35 MK II or the 35 L?  Your opinions/experience would be great on this!  thanks in advance!

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With my 5D MK III is an f/2.8 lens really needed???
« on: November 27, 2012, 04:30:41 PM »

kubelik

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #1 on: November 27, 2012, 04:36:28 PM »
it depends on a lot of things.  it sounds like you have a higher tolerance for image noise than most other folks here.  are you shooting at these venues for personal or professional reasons?  I would think the big deal regarding f/2.8 in these situations is the impact it has upon the autofocus system.  if you're happy with what you're getting now with f/4 lenses, and you feel that f/2.8 isn't contributing anything for your photography, well, it doesn't really matter what anyone else on the forum thinks.  the proof is in your own pudding.

Dylan777

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #2 on: November 27, 2012, 05:23:08 PM »
I wouldn't go over 6400 ISO with 5D III. I know it's doable up to 12K ISO, but why work on high ISO photos when you can have cleaner photos at lower ISO.

One thing for sure, you can always step down from f2.8 to f4, but not the other way around ;)

Enjoy your f2.8 IS II.
« Last Edit: November 28, 2012, 01:39:11 AM by Dylan777 »
Body: 1DX -- 5D III
Zoom: 24-70L II -- 70-200L f2.8 IS II
Prime: 40mm -- 85L II -- 135L -- 400L f2.8 IS II

Aaron78

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #3 on: November 27, 2012, 05:44:00 PM »
2.8 also gives a much nicer background blur, and can be shot at 2.8 without IQ loss. I wouldn't trade my 70-200 2.8 is II for anything......well, except for a 600 f4 is II

Zlatko

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #4 on: November 27, 2012, 06:21:54 PM »
I've been mulling over this since I bought the 70-200mm f/2.8 IS II this past weekend. Not sure if its buyers remorse or rookie mistake in not realizing the capabilities of my new 5d MK III.

I currently use a 5d MK III and while using my 24-105L f/4 i noticed that  I can easily shoot dimly lit indoor scene (church wedding, night indoor events, etc.) just by bumping up the ISO to 8000-10000 and the images look very good still!  I have not notice any drastic increases in noise and even so I can get it out using software.  Now I have not tried printing these shots yet BUT even in 100% crop the images looks good.

Is there any merit to this line of thinking that f/4 lenses are good enough to use for dimly lit scnese using the 5d MK III?  Should i exchange the 70-200mm 2.8 IS II with the 70-200 f/4 IS and save the $900 difference and apply that to a 16-35 MK II or the 35 L?  Your opinions/experience would be great on this!  thanks in advance!
I have both lenses and with the 5DIII I can now use the 70-200/4 IS in many situations where I used to use the 70-200/2.8 IS.  The 5DIII is great at high ISO, certainly better than the 5DII.  So I have thought about selling the f/2.8 lens.  The f/4 lens is much lighter and easier to carry.  The difference in subject isolation between f/4 vs. f/2.8 is not that great with a telephoto lens.  On the other hand, the f/2.8 lens is great to have for low light situations, such as when shooting at twilight, or when a higher shutter speed is needed to stop action, or when a teleconverter is used.  So I will probably keep both and carry the one that's better suited to the circumstances.  The 70-200/2.8 IS II is a great lens.  I would keep it unless you really need the extra $$$ or you mind the size & weight.

kubelik

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #5 on: November 27, 2012, 06:31:52 PM »
No offense, but a very noob question. Makes me even wonder why you have a 5D3. And you didn't seem to know what you're buying into with the 70-200. Too much money to burn?

But to answer your question, IQ demands the lowest ISOs and the fastest shutter speeds. F/2.8 may not even be enough depending on the situation. In your case you say f/4 is good enough.

Just return it - and don't buy any lenses for the meantime. Develop your skills first and master what gear you have, and when you do you'll know exactly what you need to buy next.

that's a little harsh.  I think there's actually a lot of merit to the question.  depending on your usage, some people end up shooting their f/2.8 lens at f/4 anyway to maintain sufficient DOF.  and it's not like the 70-200 f/4 IS ain't sharp wide open.  the weight savings is also significant when you're running around with it all day.

I use my 70-200 f/2.8 L IS II all the time but that doesn't mean that using the f/4 version may not be the right fit for some other folks.

pwp

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #6 on: November 27, 2012, 06:40:15 PM »
Come on ryllz75, this is being handled on your other thread on basically the same subject. You got a lot of generous feedback from photographers from all sorts of backgrounds and skill levels and the consensus was so strongly in favour of the 70-200 f/2.8isII it was ridiculous. Don't let contrary posts undermine your decision to get the lens used by most Canon professionals for very valid reasons.

Too much Q&A can be deadly. Just get to know your 5D3 & new lens and shoot as much and as often as you can. Back your own decision to buy high quality gear and get to work!

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #6 on: November 27, 2012, 06:40:15 PM »

nonac

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #7 on: November 27, 2012, 07:39:55 PM »
From shooting some indoor sports, i.e. volleyball and basketball, I found that f/2.8 wasn't enough. I bought a 135 f/2 and that full stop made a lot of difference.  I am now able to keep the ISO no higher than 6400 and keep the shutter speed I need to stop the action.  It is really dependent on the noise you can tolerate and what you will be photographing.
5d Mark III, 24mm f/1.4L II, 24-105 f/4L IS, 70-200 f/2.8L IS II, 100 f/2.8L IS macro, 135 f/2L, 3x 600EX-RT, ST-E3-RT, EF 1.4x III

robbymack

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #8 on: November 27, 2012, 07:56:29 PM »
It certainly begs the question as to whether or not f2.8 zooms need to be in your bag if you are ok with a little noise. In fact a lot of times the trade off between the speed of 2.8 vs 4 comes at the expense of dof when in reality you want both the speed and dof. I am part of the f2.8 isn't really enough to stop most action crowd so I've been very happy with my f4 IS.  When I need the speed I take a 135L...or some speed lights.

PeterJ

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #9 on: November 27, 2012, 08:06:46 PM »
Take a few outdoor portraits at 200 f/2.8 and see what you think of the look versus 105 f/4. Personally I use my 70-200 at 2.8 a lot and really like the isolation and OOF background.

PackLight

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #10 on: November 27, 2012, 08:26:21 PM »
If your only reason for buying the f/2.8 over the f/4 is the one stop advantage it has with noise then you missed many of the reasons to own the f/2.8. Yes go ahead and return it.

However once you buy the 35mm f/1.4 L you may be disappointed as well, as it isn't this lens ability to give you a stop or two of noise reduction that make it great. The 35mm is a great lens because of it's ability to be shot close to wide open and produce sharp images with a beautiful thin DOF.

What makes the 70-200mm f/2.8 II a great lens is it's ability to be shot wide open making near prime quality pics without being stoped down. Throw the f/2.8 DOF for a bit of icing.

Save your noise reduction for your software and ISO settings.
« Last Edit: November 27, 2012, 08:30:32 PM by PackLight »

wickidwombat

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #11 on: November 27, 2012, 09:48:15 PM »
you gotta be kidding! i've been in situations shooting at 1.4 on a 50 f1.4 and its still ruinning ISO 12,500 to 16,000 the 5Dmk3 is simply awesome in this regard and coupled with LR4 it's brilliant for low light events where you might not be using flash
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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #12 on: November 27, 2012, 10:17:58 PM »
I wouldn't trade my 70-200 2.8 is II for anything......well, except for a 600 f4 is II

Yeah, but the latter is really hard to use in your living room.   :P
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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #12 on: November 27, 2012, 10:17:58 PM »

PackLight

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #13 on: November 27, 2012, 10:23:45 PM »
I wouldn't trade my 70-200 2.8 is II for anything......well, except for a 600 f4 is II

Yeah, but the latter is really hard to use in your living room.   :P

Not redneck style, just knock out the back window screen, set up the bird feeder, position the lazy boy and tripod properly and your in business.

sanj

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #14 on: November 27, 2012, 11:09:00 PM »
you gotta be kidding! i've been in situations shooting at 1.4 on a 50 f1.4 and its still ruinning ISO 12,500 to 16,000 the 5Dmk3 is simply awesome in this regard and coupled with LR4 it's brilliant for low light events where you might not be using flash

Absolutely!!!

OP: Keep the lens. It is a great lens and investment.

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Re: With my 5D MK III is an f/2.8 lens really needed???
« Reply #14 on: November 27, 2012, 11:09:00 PM »