I’ve had it for about six months now and given it more than a fair shake, but ultimately I’m not happy with the Tamron AF28-300mm F/3.5-6.3 XR Di LD Aspherical (IF) I got for my primary lens for the EOS 50D. When I put this lens on, I want to be able to shoot at the long end, and I spend a lot more time there than at the short end. Unfortunately it’s just not nearly sharp enough for my tastes at 300mm. Even on a tripod with image stabilization turned on, it needs a shutter speed below 1/400s, ISO no bigger than 200, and aperture f/8.0 to f/11.0 or thereabouts to achieve adequate sharpness. That’s just too limiting. Even then, it’s far from perfect. I’ve gotten a few good shots with it like this Snowy Egret in Mason Park in March, but that’s about it:
Outside direct sunlight, it really doesn’t perform well at all. In fact, this image stands out precisely because it is so sharp. By contrast, I routinely get images that sharp while handholding my Canon EF 100mm f/2.8 Macro USM, like this Great Blue Heron from San Joaquin a few months later:
Most of my Tamron shots end up looking like this American White Pelican from the Salton Sea instead:
So I think it’s time to look for a new general purpose zoom lens. What are my options?
Ideally I want a lens with the following characteristics:
16mm wide end
600mm long end
Perfect sharpness at all extensions
Auto and manual focus
Image Stabilization
Minimum focusing distance 10cm with 1:1 macro
Under $500 price tag
Under 500g weight
A pony
Unfortunately this fantasy uber-lens doesn’t exist. Where am I willing to compromise, and what lens comes closest?
I’m much more concerned about the long end than the short end. I could certainly live with a wide end that was 50mm, or even 100mm. I’m not nearly as picky about landscape and portrait shots as I am about nature shots. I could just throw a Cheap Canon or more likely 3rd party 18-55mm lens in my bag to cover the occasional landscape or portrait shot. Maybe the Canon EF-S 18-55mm f/3.5-5.6 IS? Macro mode is nice to avoid switching lenses, but I do have an excellent macro lens, and prefer to use it when I’m actively seeking out bugs. I can go up somewhat in price.
I don’t want to compromise too much on the weight, In particular, if a lens can’t be reasonably handheld I’m not interested. If you have to put it on a tripod, then I’m a lot less likely to use it. So let’s say what I’m willing to settle for is:
50mm wide end
450mm long end
Perfect sharpness at the long end.
Image Stabilization
Auto and manual focus
Under $1000 price tag and 500g weight
Does this lens exist? Near as I can tell it doesn’t, even if I bump the price up further. Handholdable zoom lenses with acceptable sharpness just don’t go over 300 or maybe 350mm at the outside. Also, past 300mm the weight jumps to the point where a tripod is a necessity. Canon makes some great L-series lenses in the 300-600mm range, and maybe one day I’ll buy one; but I’m not going to throw one in my shoulder bag for a casual outing in the park.
The best one can do is probably
50mm wide end
200-300mm long end, and maybe you can add a 2X teleconverter
Acceptable sharpness at the long end
Image Stabilization
Auto and manual focus
$1000+ price tag and 500g weight
With this much compromise, we’re finally intersecting with reality. There are a few lenses that come close to this.
Canon 100-400mm f/4.5-5.6L IS
An L-series lens, which offers excellent sharpness and lots of zoom. However weight wise, it tops out at around 1.4kg. That’s damn heavy, and probably beyond what I can plausibly hand hold. It’s also expensive, around $1300. The short end is too long for plausible landscapes or portraits. Still it’s probably the highest quality of any of the lenses I can consider. Maybe I’ll rent one for a week and see what I think.
Canon EF 70-300mm f/4.5-5.6 DO IS USM
Not quite as good as an L-series, but probably the best short of one. Much lighter at 720g though still heavier than I’d like. It has a somewhat wider short end, which is nice, though not as much magnification on the long end. A little cheaper at around $1100. If I had to pick one right now, this is the one I’d pick. However I have heard some negative reports about sharpness at the long end though, which concerns me. If it can’t maintain sharpness at maximum extension, then it might as well be shorter and lighter. I may try and rent one of these too.
There’s also a cheaper, non-DO model; but most sources seem to agree the diffractive optics on the more expensive model are noticeably better.
Canon EF 70-200mm f/2.8 L IS USM Telephoto Zoom Lens
Another L-series. Smaller, wider, and with a much reduced zoom, but still quite heavy at 1470g. This one compromises too much.
Canon EF 70-200mm f/4 L IS USM Telephoto Zoom Lens
Same zoom range as the previous one, but maximum (minimum) aperture of f/4 instead of f/2.8 makes it quite a bit lighter and more handholdable. In fact, at 760g it’s about half the weight of it’s bigger brother. At less than $600, it’s also one of the cheapest options on my list. Maybe if I added a teleconverter I’d be happy with it?
Sigma 50-500mm f/4-6.3 EX DG HSM
The most zoom of anything I’m looking at. However that large zoom seems to come at the expense of sharpness past 200mm which is the one thing I really don’t want to compromise on. It’s also extremely heavy at almost 2kg. I think this is a pass.
Tokina 80-400mm f/4.5-5.6 ATX840 D Zoom Lens
Can’t find a lot of information on this one. It’s about $650, and zooms a little further than most other options.
Sigma 28-300mm f/3.5-6.3 DG IF Macro Aspherical Lens for Canon SLR Cameras
Possibly the cheapest option in this range at $300. Is it any good, or do you get what you pay for?
That’s what I’ve looked at so far. Any other notable lenses I’m missing?
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