Image sharpness 101
Are your photos lacking sharpness? Do they come out blurry? Did you spend hard earned cash on a new SLR camera, only to discover thatJan 25, 2010 | 0 comments | View Post
Canon EF 17-40mm f/4L USM
sandro | Nov 19, 2007 | 7 comments
This particular canon lens is a popular choice among enthusiasts. And often is a first L grade lens in the bag of an amateur – the reason is simple, it’s cheap. Buyers are mostly upgrading from plastic kit lens 18-55 IS that comes with canon cameras. For 3x price, you get better build quality, weather sealing, fast and responsive AF, and fantastic color and micro-sharpness.
Obviously it’s a great choice, for an amateur looking for a replacement of the kit lens. But this doesn’t mean it won’t be useful for a pro. In fact this is a viable alternative to more expensive 16-35L f/2.8 (Wider by 1mm, shorter on the long end, faster, better for low light, and pricey!) and 17-55 EF-S f/2.8 (This is not L lens, but is a fantastic performer, better then those two L’s together, unfortunately it’s EF-S meaning it cannot be used on full frame).
I’m going to test this lens in a real world environment under practical use. So this review won’t cover any technical issues; there will be no charts, graphs or any other measurebating comparisons. I’m sorry but if you are after this kind of information I advice you to look somewhere else.
Build quality of canon 17-40, like of any L lens, is amazing. It is also very nice to handle – Zoom ring is smooth, and full time manual focus ring is also comfortable to use. 17-40 isn’t very heavy, thus it makes a very good walk-around lens. I know some of you would say this range isn’t good for all around lens. But on a crop camera range increases to 27-64 and in practical use I find it very satisfactory for street photography.
Another issue might be a slow aperture, this lens is full time f/4 – Personally I don’t find this to be a limiting factor considering it’s use. This is Ultra Wide Angle lens meaning you want to use it for landscapes, architecture etc. and no landscape photographer shoots bellow f/8.
Quick Tests
I also decided to do some quick sharpness tests, nothing special just shooting around in my room.
Sharpness @ 40mm f/4.0 is decent as expected.
100% crop (Center)
I’ve read on several forums that 17-40L performance isn’t quite good at the long end. Frankly, I cannot confirm this.
Sharpness @ 17mm f/4.0 is excellent.
100% crop (Center)
Real world TEST shots
17mm f/4 Downsized full image.
Center crop (100%) from the test landscape shot.
Same crop with a bit of sharpening applied in Photoshop.
Update: 2008
This lens is amazing!… full view please.
24mm f/4
17mm f/5
Filed Under: Lens reviews
I’m very confused about performancec of 2 lens.
1. 17 – 40
2. 24 – 105 IS
Focal length is not a matter, I want only exelent immage quality.
which one is best for my EOS 350D ???
I used the 16-35 L mark 1 for a few years, and have been using the Sigma 15 – 30 EX for a few more years. I considered the 17-40, but I don’t like the slow aperture ( even for landscape photography, which is usually in the f/11 to f/16 range, I like a bright view finder, especially for night work ) and 17 mm isn’t really wide enough for my taste.
Personally, I’ve been lusting after a 24 mm f/1.4 L. I realize that’s significantly narrower than 17 mm, although 24 mm ( on full frame ) is a magical field of view. Just incredibly well suited to landscape photography.
Ironically, an ultrawide is the only zoom I have. The rest of my lenses are generally L-series primes. If you ever get a chance to use the fabled 135/2, it’s painful to remove from your camera…!
bhaskar mitra » Well in general it only depends on the use, if you aren’t a landscape photographer UWA like 17-40 won’t serve you well. 24-105 on the other hand would make a perfect walk-around for any need. Image quality is excellent, IS is very helpful etc. So I recommend taking the second option.
Forrest » 24L is a beautiful lens, I had a chance to rent it. Well I don’t do much of landscape photography, but for photographing people in their natural environment as a street photography style its perfect for me
You’re a little too enthusiastic.
OK, it’s a good lens but an “L” lens doesn’t really mean anything. You could get beautiful results with a cheap 1960′s lens with an adapter.
Naive beginners think all these wonderful things about “expensive” lenses, but they don’t have the experience to make sound judgements.
Stinky » Sorry, but you are wrong (from my perspective), and let me explain why… L lens means several things, that is excellent optics, outstanding build quality, blazing fast AF, and in some cases weather sealing. On the other hand I agree, there are some gems among old lenses that can be comparable even better (image quality wise).
But then again buying lenses from 1960′s doesn’t make any sense, since you loose AF, AV reading, using adapter also causes some lenses to loose infinity focus. So paying extra for a brick (L) that will last you decades isn’t such a bad idea – Considering that contrary to the popular idea lenses from 60′s cost quite allot. I’m talking about real gems from the Zeiss, Planar, collections (take a look on ebay). Some of old MF lenses with excellent reputation sell well over their depreciated price.
p.s. Oh and all this arguing made me dizzy… lets not forget, at the end of the day, its the photographer who takes photos, and gear doesn’t matter much!
Nice review and photo’s – This will be the first lens I will purchase to go with the 30D I have my eye on!
Thanks