zoom vs primes in M4/3s, the truth

I think we agree on most things
Yes, I think there's quite a bit we agree on.
except for two points.

1. Most users (not you by your post) will use any zoom they get primarily at one end of it's range or the other for the majority of what they shoot. They learn to see in two focal lengths mainly because they are alway limited by those two extremes of range.
Hard for either of us to really know anything about that. And all I really care about is what can be done rather than what most people do.
Simply based upon images I see from others with exif intact and what I see people I know do.
2. I like photozone for what it offers but find comparing charts and percentages to be very misleading at times. From this part...
http://www.naturfotograf.com/index2.html
of my favorite reviewers site..

"On the other hand, sites exist that overwhelm you with MTF plots purportedly providing indisputable facts. MTF methodology has a genuine scientific foundation and there is nothing "wrong" with MTF as such. I even understand the mathematical equations. However, such statistics basically are as helpful as knowing the mass of a lens - on its own, MFT testing cannot predict the pictorial outcome of any lens. Thus, MTF tests will not show all problems from field curvature, colour fringing, flare and ghosting, the variability in performance that arises from near or distant focus, the subjective 'feel' of the images and in particular the out-of-focus rendition (given the buzz word of 'bokeh'), the way a lens handles under actual use, and so on. MTF data can just indicate there is a problem with a lens, or that a particular lens might be an excellent piece of glass. All of this information can be obtained as easy (but likely not as fast) just by shooting pictures with the lens. Averaging MTF numbers to arrive at a single value in order to rank lens quality is simply impossible and largely a waste of time."

That last sentence sums up how I feel about MTF numbers and using them to compare lenses. Especially based on opinions and the majority of reviews vs. what I see in real use.
My point was not to suggest that MTF numbers provide all the information we need about a lens. I chose it merely to exemplify the more general point that a good standard zoom can perform about as well as a good prime, and at any rate sufficiently well, when shooting at the rather small apertures that the zoom allows us to use.
I can agree with that.
--
The worst vice is advice. - John Milton from The Devil's Advocate
 
I do not see, however, running around with three or four primes, changing lens all the time, and thinking somehow that makes your photos much better. I believe that to be nonsense!
I've had more than one friend I was helping learn to take better photographs over the years do the following to help them. I gave them a cheap 50mm prime. I then asked them to use only that prime for one month. All I asked of them was at the end of that month to give me the 50mm back. It's an old exercise to help people how to "see". I've never had one that didn't feel like that exercise had helped them. I can see where you may feel that to be "nonsense" but like I said it helps alot of people to learn how to "see" images they would otherwise miss.
--
The worst vice is advice. - John Milton from The Devil's Advocate
 
If you can frame exactly with a zoom and eliminate cropping all together, wouldn't that make for better IQ that a cropped shot from a prime?
Unless the cropping is very minimal, yes.
I have the Panny 20mm prime and if I'm not using it for low light, I find myself not using it in favor of a zoom.
Me too - I use my primes for low-light and DOF control, otherwise I use a zoom. I never select a prime because of optical quality. While it used to be true that primes were sharp and zooms were horrible, that hasn't been the case for at least a decade or two. Primes still tend to be better optically, but the gap is so small now that any little bit of cropping you have to do with the prime will close the gap, at least when comparing to good quality zoom lenses.

--
Lee Jay
(see profile for equipment)
 
Primes are more often than not brighter and sharper than zooms, as well as smaller.

When you have a set of primes you can change lenses to compose, so cropping is not much of an issue but having to change lenses is.

I find that primes in the 28-60 mm (equivalent) focal length range are actually very convenient as you can "zoom with your feet". IMO zooms have the edge (in having the freedom to compose the shot you had in mind) in wider as well as longer focal lengths.

A kit consisting of an ultra wide to wide angle zoom, a few primes (35, 50 and 85 equivalent) and a tele zoom makes tons of sense.

YMMV
--
Jonathan
 
pity you dont understand that using primes its not about quality...its about composition..amateur use zoom couse they are lazy and they lost 80% of times moving hand on zoom.....mechanism....

its easier use zoom and quality of composition its lower...
 
You better calm down.
It's provoking by questioning my right to pose a question. Because I seem to find my zoom working easier for me in in everyday good light shooting and the prime was getting so touted by so many, I thought I may be missing something here. How many times do I have to explain it to you. You are simply a speaker and not a listener.
--
Thomas
 
yes most professional are not photographer also...i dont consider a real photographer who shot snapshot for passport use in studio...just a professional ...but not in photography...
 
Primes are more often than not brighter and sharper than zooms, as well as smaller.

When you have a set of primes you can change lenses to compose, so cropping is not much of an issue but having to change lenses is.

I find that primes in the 28-60 mm (equivalent) focal length range are actually very convenient as you can "zoom with your feet". IMO zooms have the edge (in having the freedom to compose the shot you had in mind) in wider as well as longer focal lengths.

A kit consisting of an ultra wide to wide angle zoom, a few primes (35, 50 and 85 equivalent) and a tele zoom makes tons of sense.
Exactly my view. With the proviso that If I had to lose two lenses, it would be the two zooms, the 9-18, and the 40-150 which I love.

But I could do with only a 35 eq. prime. It is a matter of perspective and social interaction, and that can only be done 'with one's feet'.

Am.
--
Photostream: http://www.flickr.com/photos/amalric
 
Oops, at least half the shots in the "What Happens When We Die" set are taken with a Color-Skopar 50/2.5. I'm pretty sure every shot was taken at f5.6, so a zoom could have been used for all of them. Still, I prefer shooting primes.

:)
 
I think we agree on most things except for two points.

1. Most users (not you by your post) will use any zoom they get primarily at one end of it's range or the other for the majority of what they shoot. They learn to see in two focal lengths mainly because they are alway limited by those two extremes of range.

2. I like photozone for what it offers but find comparing charts and percentages to be very misleading at times. From this part...
http://www.naturfotograf.com/index2.html
of my favorite reviewers site..

"On the other hand, sites exist that overwhelm you with MTF plots purportedly providing indisputable facts. MTF methodology has a genuine scientific foundation and there is nothing "wrong" with MTF as such. I even understand the mathematical equations. However, such statistics basically are as helpful as knowing the mass of a lens - on its own, MFT testing cannot predict the pictorial outcome of any lens. Thus, MTF tests will not show all problems from field curvature, colour fringing, flare and ghosting, the variability in performance that arises from near or distant focus, the subjective 'feel' of the images and in particular the out-of-focus rendition (given the buzz word of 'bokeh'), the way a lens handles under actual use, and so on. MTF data can just indicate there is a problem with a lens, or that a particular lens might be an excellent piece of glass. All of this information can be obtained as easy (but likely not as fast) just by shooting pictures with the lens. Averaging MTF numbers to arrive at a single value in order to rank lens quality is simply impossible and largely a waste of time."

That last sentence sums up how I feel about MTF numbers and using them to compare lenses. Especially based on opinions and the majority of reviews vs. what I see in real use.
This last sentence of yours says it all.
--
The worst vice is advice. - John Milton from The Devil's Advocate
--



Time, that aged nurse,
rocked me to patience.
 
You got it.

I was thinking along the lines of the four thirds 11-22 (what a great lens - it took me a while to understand how lovely it is) and 50-200.

Four thirds has some really good zooms and mft has got nice primes... I hope Olympus eventually find a way to integrate the two systems!

--
Jonathan
 
This is the best response so far,to me, because it interprets my thinking that triggered the thread to begin with. My thinking is that a good general purpose zoom is as useful as any prime, and more so under certain circumstances, and that a high speed prime is a specialty lens. It is for low light and other specialized shooting to keep shutter speed up and ISO down and the better optical performance is a plus. The smaller size and lighter weight are also advantages. The theory that a prime makes you look and think and deliberate more is just a theory. Why wouldn't you be just as deliberate with a zoom, if you were serious about your shot? I neglected to mention limiting depth of field also as an advantage of the prime. Most normal light everyday shooting I'll use my zoom, and if the situation calls for it, I'll use my prime.

I do not see, however, running around with three or four primes, changing lens all the time, and thinking somehow that makes your photos much better. I believe that to be nonsense!
Jere, you said it best right here. The fact is, few people are so decisive about composition as to go nuts whether they will have best DOF, bokeh, et cetera. In my own situation, I love to take pictures and just go out and take a bunch. It isn't like I am going to sell them or make huge prints. More than likely I will email them to you and others. I bet most here do the same. It is not a precise science, it is a hobby for most I bet. Use the lens which is on the camera. Mine is fixed and that sure simplifies it.

--



Time, that aged nurse,
rocked me to patience.
 
If you like shooting with primes, there is something boring about shooting a mediocre zoom even if you can't demonstrate why in photos. Further up in the thread I posted links to some of my "creative" photo sets taken with primes and immediately acknowledged that they all could have been taken with a zoom.

Just like the new Oly 45, the Color-Skopar 50 that I used in some photos has unique rendering properties that I personally like, but I can't say I'm relying on these for any of these photos.

Before I got my Oly 17 and adapters for my legacy primes I shot some really good photos with the 14-42 kit zoom and they were my first m43 photos to be shown in a gallery.

For prime shooters it is the experience etc. of shooting primes that makes it better. At its best, photography is an art, and all arts rely on the artist's emotions and feelings. There are no equations, photos of line pairs or brick walls to explain this. If you like shooting primes better then your photos will probably be better when you shoot a prime, if you prefer shooting zooms then your photos will probably be better when you shoot a zoom.

The OP shouldn't expect other people to explain what will work best for him, as I said in my initial post to this thread, it's a personal choice, there are prime people and zoom people, but in the end it is the photos that you take that matters.
How is the 14-42 boring and why aren't you getting good shots from it? How are your prime shots better and please show some photos to demonstrate the difference.?

Do you also think shots from the 14-45 would be better than the 14-42 visibly?
 
When I shoot a zoom, I tend to preset my zoom to a marked and known FL and frame as if I'm using a prime of that length. Not sure if it holds for the Oly kit zoom, but historically, most zooms are noticably better at the marked FL's. Also, for me, these are FL's that I have a long history of shooting in primes. The only really "zooming" I do is generally if I've set up my tripod and make a minor tweek in or out, but it is always minor.

So, yes, I'm agreeing with you. With a zoom or a prime you should be aware of the perspective you are getting from you FL, this is often as critical as framing, even when people aren't aware of it.

I guess some think the case for primes can be made for beginners who often frame with their zoom without thinking of perspective... but these same people can be handed a prime and make the same mistakes... don't know if there is any shortcuts to take. I know I'm still learning after shooting for more than 30 years!

In the old days when everyone started with a fast 50 on 35mm beginners probably got better photos from the start because -- while some think it is boring -- a 50mm FL is very safe perspective-wise. Haven't decided if that is really good, but if you take a good photo with a 50 the perspective is probably reasonable. When you hand someone a zoom with a wide FL of something like 24mm they take photos without recognizing the perspective implications of shooting something so wide.

Anyway, I like shooting primes. When I shoot something, I will usually start with a wider prime, like the Oly 17, shoot the general setting, then go back through with a longer lens for the details. I like concentrating on one perspective at a time and then moving to the other.

That's me, sometimes I miss shots shooting primes because I don't have another lens with me. When I shoot a zoom, sometimes I miss shots because I get distracted by seeing something I want to shot using a different FL.

What I say over and over again, "there are an infinite number of photos to take." You don't need to have every FL all the time to "be covered" for all possible photos, because there are infinite shots to take and you can never take them all anyway. So zoom shooters thinking they are missing shots with a prime are missing shots that they don't see.
You can't always zoom with your feet and doesn't zooming with your feet change the perspective?
 
The fact that using a fixed focal length lens makes it sometimes difficult to frame a shot and sometimes impossible to get it the way you would like, then how much does it affect the image quality. What I mean is, I find it aggravating to try and frame with a fixed focal length. I find that a lot of the time I am inclined to crop, and if I have too, how much does that degrade the image quality. If you can frame exactly with a zoom and eliminate cropping all together, wouldn't that make for better IQ that a cropped shot from a prime?
Cropping 10-20% has pretty much no effect on IQ if you are shooting 8-10mp.
I don't know the answer, that's why I'm posing the question. I realize it would depend on how much you cropped. I find shooting with a fixed focal length to be a pain in the butt for that reason. Yet, I hear so much about how great these fast primes are. I have the Panny 20mm prime and if I'm not using it for low light, I find myself not using it in favor of a zoom.
Depending on the lenses, the IQ of a prime can be quite a bit better than an equivalent focal lenght in a zoom. More importantly, most primes are 2-5 F stops faster than the zoom at the same focal length (e.g a f/1.4, 50mm legacy lens compared to the 14-150mm zoom at 50mm, 14-42mm v. a 40mm f/2.0 Leica prime) so subject isolation, etc. is vastly different.

Furthermore, there are many available light situations where the zoom is so slow that you can't get the shutter speeds you need to prevent motion blur (e.g. bride walking down the isle).

Finally, primes are always smaller and lighter than zooms. This is important for travel, hiking, etc.




To me framing the shot quickly and exactly is more of a plus than a small amount of extra sharpness. How many agree with me and how many disagree?
I don't think anyone is going to agree with you. If you were correct everyone would buy zooms and no one would be clamoring for fast primes.

Maximus Decimus Tedolphus
 
This is the best response so far,to me, because it interprets my thinking that triggered the thread to begin with. My thinking is that a good general purpose zoom is as useful as any prime, and more so under certain circumstances, and that a high speed prime is a specialty lens. It is for low light and other specialized shooting to keep shutter speed up and ISO down and the better optical performance is a plus. The smaller size and lighter weight are also advantages. The theory that a prime makes you look and think and deliberate more is just a theory. Why wouldn't you be just as deliberate with a zoom, if you were serious about your shot? I neglected to mention limiting depth of field also as an advantage of the prime. Most normal light everyday shooting I'll use my zoom, and if the situation calls for it, I'll use my prime.
Why wouldn't you always want to keep your ISO down if you could?

Better optical perfomance, higher shutter speeds, etc.

Who doesn't want that?
I do not see, however, running around with three or four primes, changing lens all the time, and thinking somehow that makes your photos much better. I believe that to be nonsense!
With experience it takes about ten seconds to change prime lenses. It can be done one handed, and if they have raised alignement dots a la Leica it can be done with your eyes closed.

Maximus Decimus Tedolphus
 
Cropping 10-20% has pretty much no effect on IQ if you are shooting 8-10mp.
But why crop at all if you don't have to.
Depending on the lenses, the IQ of a prime can be quite a bit better than an equivalent focal lenght in a zoom.
I assume we are talking about m43 lenses here. So what primes are distinctly superior to the 14-45 at comparable apertures? And what evidence do you have to back up your claims?
More importantly, most primes are 2-5 F stops faster than the zoom at the same focal length (e.g a f/1.4, 50mm legacy lens compared to the 14-150mm zoom at 50mm, 14-42mm v. a 40mm f/2.0 Leica prime) so subject isolation, etc. is vastly different.

Furthermore, there are many available light situations where the zoom is so slow that you can't get the shutter speeds you need to prevent motion blur (e.g. bride walking down the isle).
As far as I have understood, the OP does not suggest that we avoid using primes when the circumstances call for it (low light, shallow DOF). Rather, he suggests that there are also circumstances when using a zoom might be preferable (due to continuous and fast access to different FLs/FOVs).
Finally, primes are always smaller and lighter than zooms. This is important for travel, hiking, etc.
So what smaller and lighter prime would you suggest as a replacement for the Panasonic X 14-42?
 
The 20mm, the 25mm, the 45mm Oly and the 45mm Panny macro are all sharper edge to edge at comparable apertures, especially when they are already closed down several stops and the zoom is still wide open.

Zoom are a compromise, in terms of speed, and also optics, in exchange for versatility.

14-45 is a very nice zoom, not suggesting it isn't, but shoot it at 45mm f4.5 vs either of the 45mm primes closed down to f4.5 as well and you can see, especially at the corners the primes are better.

F8-11 things equal out, largely due to diffraction, but one wouln't really buy a prime to shoot it closed down all the time, nor is it where its sweet spot is.
I assume we are talking about m43 lenses here. So what primes are distinctly superior to the 14-45 at comparable apertures? And what evidence do you have to back up your claims?
--
http://www.millsartphotography.com
 
Carry what primes you think you will use on any paticular day. I think 3 focal length's are enpugh. Own many from 24mm through 800mm all in primes.

Now this applies best to FF, our m4/3 cameras spoil it for wide angle and of course extend the reach of our supertele lenses.
--
Life as an artist has had some unusual times to say the least.
visit my web site http://www.flickr.com/photos/artist_eyes/
Remember to click on 'All Sizes' for better viewing.
Artist Eyes
 
Definitely agree on the 25 and 45s.

Not so sure about the 20. It is not so much that I disagree, just that I can't say that I am as confident about it. There is not doubt that it is a stellar lens in terms of relative compromise of IQ vs size & speed. It is that slight compromise that gives me doubt. Anyway, I digress, I'm not about to recommend to people to give up their 20s because they have one of the current zooms.

To me, it is not about edge-to-edge sharpness anyway, I've found the biggest difference to be colour rendition and bokeh. Sure, I can mess with the colour in PP, but why would I want to if I can get it OOC? Although some might say 6 of 1 or half a dozen of the other... I spend more time shooting changing lenses or I spend more time in PP!

I just tend to find that the zooms tend to feel flat and a little less lively than the primes (even when they are stopped down to the same aperture).

And of course, there is not substitute when you feel the need for speed.
 

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