Which 50mm lens is the best? The Canon EF 50mm f/1.8 II or the Canon EF 50mm f/2.5 Compact Macro?

I have as of a few months now, I have two 50mm prime lenses – the Canon EF 50mm f/2.5 Compact Macro and the Canon EF 50mm f/1.8 II.

I wanted to compare them to see if one is clearly better for another. After all, if I’m going to use a prime lens, why not use the best one? Before we get to the photo comparisons, let’s take a look at the other factors.

Weight

The f/1.8 not only looks to be about 60% of the size of the f/2.5 Macro, but it actually weights half as much.  B&H lists the f/1.8 at .29 lbs and the f/2.5 Macro at .61 lbs.  Neither one is exceptionally heavy, especially if you’ve ever held the EF 70-200mm f/2.8!  But if you require the lightest lens the f/1.8 is the way to go and over a long day may feel better.

winner:  f/1.8

Materials/Price

The f/1.8 is the cheapest EF lens Canon makes.  Although it has long been listed at $90, recent economic events have caused Canon to raise the price and it is now listed on B&H for $114.  Therefore it should be no surprise that it looks and feels cheap.  It’s wholly made of plastic and a lot of people complain that it feels cheap and that bothers them.  Frankly, as long as it doesn’t break easily I don’t care as long as the photos come out good.  (And they do!)  The f/2.5 is currently listed on B&H for $274.  It is definitely a more solid construction.  While parts of the body are plastic, the mount is metal and feels very snug when you mount it onto your EOS body.  Also it has a distance window for manual focus (as you can see below on the right).  Based on materials and price, basically you get what you pay for.

materials winner:  f/2.5

price winner: f/1.8

The extension length of the Canon EF 50mm f/1.8 II vs Canon EF 50mm f/2.5 Compact Macro

Maximum Focus Extension Length

As you can see above, the f/2.5, on the right, extends a lot further out when you’re focusing close than the f/1.8 does.  Is this a big deal?  It is to some people.  It means if you’re close to your subject you’ve gotta be a little careful.  It also tends to suck in more dust than a lens that doesn’t change length when focusing.  It’s really not that big a deal, but it does bother some.

winner: f/1.8

Focus ring

Whether you do it regularly or not, one day you will need to manually focus your camera.  The focus ring is what you turn in order to manually focus.  The f/2.5 has a decent-sized focus ring.  The f/1.8 has a vestigial ring that seems about to evolve right off the lens.  It’s more or less like the kit lens that came with the EOS 350D.  The f/2.5 wins without major contest.

winner: f/2.5

Closest Focal Distance

The f/1.8 can focus as close as 0.45 meters.  The f/2.5 macro can focus as close as 0.22 meters.  Makes sense – the f/2.5 is a MACRO lens.  So the f/2.5 easily wins.  Unless you don’t need the macro functionality.

A macro shot taken with the Canon EF 50mm f/2.5 Compact Macro

winner:  f/2.5, but trivial if you don’t ever intend on doing macro photography

Sound While Focusing

This is another one of those features that, like the extension of the lens when it focuses, bothers some, but not others.  It’s one of the selling points of why people buy USM lenses.  They are both orders of magnitude much louder than my USM lenses when they are auto focusing.  The f/2.5 is a bit louder than the f/1.8.  Does it matter?  Maybe, if you’re trying to photograph a baby without waking it up or an animal without startling it.  Or if you’re in a museum or church.  At the ball park no one will care.

winner:  f/1.8

Low Light Performance

In the same way that the f/2.5 automatically wins on the closest focal distance, the f/1.8 automatically wins on low light performance.  Opening the aperture all the way to  f/1.8 allows a lot more light into the lens and lets the photographer capture photos in lower light than they might otherwise be able to.  Using the f/1.8 you can take photos at night and not have to use your flash.  (If the conditions are right)

A low light photo taken with the Canon EF 50mm f/1.8 II

winner f/1.8

Now onto the photo comparisons.  I put my camera on a tripod and photographed the same scene at different f-stops to do a comparison to see where the lenses differ.  First off, opened up to their maximum apertures.

Maximum Aperture (f/1.8 and f/2.5)

Canon EF 50mm f/1.8 II Wide Open

Canon EF 50mm f/2.5 Compact Macro Open Wide

First of all, the f/1.8 is (at 100% zoom) actually sharper wide open than the f/2.5.  On the other hand, the photo seems brighter in the f/2.5 photo.  So, wide open if you want sharper photos, the f/1.8 wins.  But colour-wise the f/2.5 wins.

winner:  tie

At f/2.8

Canon EF 50mm f/1.8 II @ f/2.8

Canon EF 50mm f/2.5 Compact Macro @ f/2.8

Once again f/1.8 wins for sharpness.  This time the colour saturation is about the same.

winner: f/1.8

At f/8

Canon EF 50mm f/1.8 II @ f/8

Canon EF 50mm f/2.5 Compact Macro @ f/8

I chose f/8 because it’s often recommended as a good f-stop for sharpness.  Now both lenses have the same sharpness.  f/1.8 has better colour saturation

winner:  tie

At f/11

Canon EF 50mm f/1.8 II @ f/11

Canon EF 50mm f/2.5 Compact Macro @ f/11

f/11 is supposed to be the greatest you can stop your lens before diffraction starts to wreak havoc.  The f/2.5 is finally sharper.  The f/1.8  still has better colour saturation

winner:  f/2.5

Conclusions

First of all, this isn’t completely scientific.  I tried my absolute best to keep the camera in exactly the same place and to focus on the exact same place each time.  But I’m extremely surprised that the f/1.8 worked so darn well for the f-stops I tested.  I mean, in the real world I have been impressed with the f/1.8 in a way that I hadn’t been since I got the f/2.5, but I thought the macro would be better quality.

Well, based on features, the winner was the f/1.8 by 5 to 3.

Based on photos, it was a tie 3 to 3.

So basically you need to look at what types of photos you will be taken and buy your lens based on that.  They both appear to be very good, but the f/1.8 eeked ahead and is recommended for your first prime lens, especially if money is a concern.  But if you want to explore macro, you can’t beat the f/2.5.  Hope that helps, I know I was very surprised with the results.

Related posts:

1. Review: Canon EF 50mm f/1.8 II
2. How Far is infinity?
3. Apparently I mostly shoot wide

Canon EF 50mm f/1.8 II Box

Canon EF 50mm f/1.8 II lens on its box

Recently I got my fifth lens, the Canon EF 50mm f/1.8 II, Canon’s entry-level nifty fifty lens.  This is the cheapest lens Canon makes and, build-wise, it shows.  Unlike the other lenses I own (even the kit lens), the 50mm is very plastic-looking and plastic-feeling.

So why get this lens?  First of all, it only cost me $114 for an EF lens with an aperture larger than f/2.8, that is a phenomenal price.  Second, it can open up all the way to f/1.8!  This aperture opens up a whole new level of low light handheld photography.  Just in case you don’t know why, let me take a quick momemt to explain.  The f-stop, or aperture, is the denominator of a fraction.  Therefore the smaller the number, the larger the aperture.  The larger the aperture, the more light that is let into the lens.  Therefore, you can have a higher shutter speed and, therefore, be able to take picture in low light without a tripod.  Of course, the greater the aperture, the smaller the apparent depth of field.  In other words, not very much in front and behind your focal point is in focus.  Let me illustrate this with some photos I shot when I got the lens.  The following DVD cases are about 4-6 inches apart from each other.

Here I focused on the first stack

Here I focused on the second stack

A self-portrait with the Canon EF 50mm f/1.8 II at f/1.8

And if that was too abstract for you, here’s a self-portrait I took at f/1.8.  Now, it’s hard to tell without looking at the large version of that photo (larger than would look good on my blog), but go ahead and click through.  Did you notice that my ears and the back part of my head are out of focus?  Even the tip of my nose is a little out of focus.  In fact, even my further eye is less in focus than my closer eye.  This is great if you’re shooting portraits with a very busy background.  Everything in the background will blur together and people will focus on your subject.  People have criticized this lens at this f-stop, but I think it delivers good results – you just need to be a lot more careful.

This lens is small.

I want to return to how small this lens is.  It is almost too small.  The manual focus lens is almost vestigal.  And trying to grip the lens while holding your SLR often leaves you thinking it should be a bit larger.  (See the last picture in this blog post)  However, this is also a good thing because the lens isn’t too heavy.  It barely adds any weight to your SLR, so if you were traveling around and wanted to minimize the weight on your neck/hands, it would be a good lens.  I find 50mm to be a pretty good walkabout lens on my 400D, even with its 1.6x crop.

The  only other real negative is that this is not a USM lens.  The Canon EF 50mm f1.4 lens is the next most expensive 50mm lens Canon makes.  And it’s $400 or so.  That’s a lot more money and all your really get is USM and a larger manual focus ring.  Some reviews I’ve read say the optics between the f/1.8 and f/1.4 lenses are pretty much the same.  So the lens is loud when it focuses.  Make that loud and cheap sounding – even the kit lens doesn’t sound that bad when it focuses.  But that’s not really too bad.  And for that price, it’s really worth getting.

I’m pretty happy with the performance so far.  I’m hoping to try it out next time I go to NYC to see how it compares at night photography to my 50mm macro lens.

The Canon EF 50mm f1.8 II lens on the Rebel XTi (400D)

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Related posts:

1. Battle of the 50mm Primes
2. How Far is infinity?
3. Actually, Size DOES Matter