Product Description
This lens has a minimum focusing distance of 7.9 inch (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range. This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2 inch) and diameter 79mm (3.1 inch). It performs superbly even in relatively low light conditions indoors or at dusk. The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with a Zoom Lock Switch. Maximum Magnification - 1 - 2.3 Filter Size - Diameter 72mm Dimensions - Diameter 79mm x Length 82.5mm, 3.1 x 3.2 inch Weight - 455 grams (16.0 ounces)
Customer Reviews:
Great Walk-Around Lens.......2007-10-31
I have this lens now for around 5 month and am very happy with my purchase.
The pictures come out very sharp and colors are very vibrant.
As far as the construction goes it is very solid for the money and rattles not like some of the Canon EF-S Kit lenses.
At first I had the lens on my Rebel XT and now transferred it over to my new Canon 40D and picture quality is equal as far as sharpness, vibrancy etc. go.
The only slightly negative thing I can say about the lens is that at 17mm with the Lens Hood on, you can have some slight vignetting.
Extreamly useful lens.......2007-10-26
This lens is a workhorse. It can handle everything but telephoto reasonably well. Its been my primary lens since I got it. The build quality is pretty sturdy tho not as good as metal.
If 17-70 is the focal length you are looking for you could do a lot worse than this.
nice upgrade to canon's kit lens(es).......2007-10-15
Nice and fast at wide, still faster at 70mm tele then the canon's 18-55 kit. Macro capability is very good. However, AF sometimes hunts at lower light and tele (but nothing that cannot be solved by MF). Build quality very good. All in all, very good replacement over the 18-55 kit(or even better - save yourself the time and money and buy this one prior to the kit)
Beware bad copies, but If you get a good copy this is the sharpest Lens you may ever have on your Canon EOS.......2007-09-29
Update 10-09-2007 The description below applies to a friends Sigma 17-70 I tested. I recently ordered my own copy through Amazon / 47th St Photo. I was very disappointed when the lens I got was way out of calibration with very soft center area focus at 28mm near infinity af F5.6 getting more out of focus as you approach the top right side of the lens. I have contacted 47th St Photo and they are going to replace it with another copy. It's too bad my copy of this lens is so out of calibration I really loved the super sharp photos from my friends copy. Will post an update in the coming weeks when I test my new copy.
Update 10-25-2007 Received the replacement copy Sigma 17-70 yesterday and was VERY DISAPPOINTED when this lens was also out of calibration!!! That's two Sigma 17-70 lens out of calibration in a row. This one back focused horribly from 17mm to about 48mm and was soft focus on the lower left side. I give up, I went with my friend to the local camera shop and after testing several lens the closest Canon lens that I thought gave great results compared to my Canon 50mm F1.8 and my friends Sigma is the Canon 17-40 F/4.0 L. I am sending the Sigma back to 47th Street photo for replacement and an upgrade to this lens.
Update 11-07-2007 Got my new Canon 17-40 F/4.0 L Lens today and quickly did a test of it against my friends Sigma 17-70. Again mounted on a tripod with mirror lockup and cable release using the exact same settings Aperture Priority at F8 / 28mm Zoom setting. I must have gotten a great copy because the Canon 17-40 is sharper just slightly but it is sharper everywhere at every setting then the Sigma 17-70. Still for twice the price it should be. Color saturation is very similar with maybe a slight edge to the Canon. Plus the Canon has the great build and quiet USM auto focus. Plus this is the first copy I got of the Canon and it was great where as I went through two copies of the Sigma trying to find one as good as my friends which I never did. So again, if you get a great copy the Sigma 17-70 can be perfectly acceptable for about half the price.
Pros:
Fastest non-USM auto focus I have ever used
Great indoor flash photos with Canon 430EX Speedlite
Great contrast, deep colors and no chromatic aberration
The next to the sharpest lens I have ever had on my Canon Rebel XTi Canon 17-40 L is sharper.
Nice zoom range 17 - 70mm = 27.2 to 112mm on Rebel XTi
Surprisingly bright and clear looking through the viewfinder
Accurate right on the money exposure both natural light and flash
Excellent close focus ability, you can touch the lens hood to the subject and still focus.
SHARPER then Canon 24-70mm f/2.8L throughout and Canon 70-200 2.8 L at 70 almost as sharp as Canon 17-40 F/4.0 L that I just got.
Cons:
Quality control, beware of bad copies!
F2.8 only between 17 - 20mm
Zoom ring a little over dampened and stiff
Auto focus louder then USM style focus
One copy I had was very hard to mount to camera body
Very noticeable lens vignetting at wide zoom wide open
Have to use switch to manual focus no full time manual focus
A little too sharp for good portraits (you can always soften using Photoshop)
Lens hood blocks flash coverage in bottom part of photo when using built in flash on Rebel XTi
Results:
I have been searching for a better walk around lens for my Canon Rebel XTi since the Kit lens is just to soft and suffers from chromatic aberration.
I had been thinking about and have tested a Canon 17-40L in the store and borrowed a friends Canon 24-70mm f/2.8L at the zoo and thought they were both pretty sharp lens.
My friend recently purchased a Sigma 17-70mm F2.8-F4.5 Macro DC lens and asked if I wanted to try it.
Imagine my shock when I got this lens home and it blew away not only the and Canon 24-70mm but also my Canon 70-200 2.8L in sharpness!!! My new Canon 17-40 F4 L is sharper though
This lens is so tack sharp you had better wear gloves when you handle it!! The images were razor sharp edge to edge at all apertures.
This sharpness is great for landscapes cityscapes, macro shots etc but a little too sharp for portrait as every little blemish is shown!
And the flash problem I was having with my Rebel XTi was all kit lens. This Sigma using indoor flash just plain rocks with even lighting edge to edge using my Canon 430EX Speedlite even at 17mm and no sign of chromatic aberration I was having. Just one warning for those without external flash the lens hood will cast a shadow on the bottom of your photos if you are using the built in flash.
Another surprise was the auto focus which has to be the fastest non USM auto focus I have ever used. It won't quite keep up with my Canon 70-200 2.8L but it was close. I had my daughter run towards me with the lens at 70mm zoom from 40 feet away and got 5 good focus shots in sports mode with the Sigma and 8 good focus with the Canon.
Also note there is no way to manual focus without turning off the auto focus but you may not have to as this lens will focus every bit as good in the dark as my Canon 70-200 2.8L. Yeah the focus motor is louder but will only matter if you are shooting wild life or wedding photography.
This lens is not perfect to be that it would have to have USM auto focus weather sealing and F2.8 throughout the zoom. The apertures change as you zoom as follows:17-20mm f2.8 ; 21-24mm f3.2 ; 25-34mm f3.5 ; 35-54mm f4.0 ; 55-70mm f4.5. Would have been nice to have it be 2.8 throughout still it makes up for it in the great photos it takes.
In closing this is an excellent lens and I would have bought one if I could have gotten a good copy. I gave up and upgraded to a Canon 17-40 F4 L.
This lens can make a great vacation zoom or walk around zoom where you only want to carry one lens.
Lens I own
Canon 50mm F1.8 II great portrait lens
Canon Kit EF-S 18-55/3.5-5.6 sorry soft junk
Canon 17-40 F 4 razor sharp great color fast focus!
Canon 70-200 2.8 L great portrait and action lens
Conclusion this can be a great lens, but due to quality control problems at Sigma I suggest if you want this lens buy only where you can return it easily or try it before you buy. 47th Street photo was gracious enough to send me two copies before I gave up after getting bad ones and bought a 17-40 Canon from them instead.
EXCELLENT SERVICE!!!.......2007-09-25
Item arrived as described in 2 days using the normal delivery option! And so far, my Sigma lens is working fine.
Product Description
Sigma Corporation is pleased to announce the launch of the new 17-70mm F2.8-4.5 DC MACRO lens. It can be used with wide variety of subjects and it is an ideal large aperture standard zoom lens for digital SLR cameras featuring APS-C size image sensor. This lens has a minimum focusing distance of 7.9.. (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range. This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2..) and diameter 79mm (3.1..). It performs superbly even in relatively low light conditions indoors or at dusk. The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with Zoom Lock Switch that eliminates ..Zoom Creep.. during transportation.
Customer Reviews:
Excellent zoom that is as sharp as my prime lens.......2007-12-14
I have a Pentax K10D and a Pentax SMC-FA 35/f2.0AL lens. I bought the sigma 17-70 lens to meet my basic walkaround needs based on the recommendations given by various folks on the Pentax SLR forum at dpreview. I received this lens and I am thrilled with the quality of the photos even wide open. While the 2.8 wide aperture is only valid from 17-21mm, the lens is really sharp in the entire range.
I have compared the performance of this lens with my 35mm prime at equal 35mm and equal apertures and the photographs are just as sharp with more pleasing (warmer) colors. The sigma lens is also made in Japan and the construction quality looks really good. The only two downsides are 1. The lens does not balance well on the camera (even with the BG2 grip on) so one has to place the camera LCD side down. 2. The zoom is a little stiff and one has to turn in the other way (counter-clockwise) to extend the focal length (unlike my 18-70 Nikon zoom)
Vey highly recommended. 47th street also delivered in a timely fashion and with excellent packaging.
Very good "walk around" lens.......2007-08-02
Better than the standard kit lens for a few reasons; it's a little faster, a little wider and much longer, good macro capability. It's effectively a 28-105mm zoom (35mm equiv.), great for general purpose wide angle work, and a decent portrait lens at the tele end. Nice and sharp. You can get more pure speed by looking at the 16-50 2.8 constant aperture lens Sigma makes, but you'd be giving up a lot of zoom and paying somewhere around a 40% premium to do so. You can get more tele reach with the 17-125 that Sigma makes, or that monster 18-250mm, but you're giving up speed and close focusing. So just buy it already, along with a good long tele zoom (say, 55-200?) and a fast normal prime (say, the lovely Pentax 50mm f1.4).
Complements my K100D well.......2007-03-11
I replaced the kit lens on my Pentax K100D with this. I really like this lens as a general purpose indoor lens. I use it mainly for family photos and have been pleased with the results.
Product Description
This lens has a minimum focusing distance of 7.9 inch (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range. This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2 inch) and diameter 79mm (3.1 inch). It performs superbly even in relatively low light conditions indoors or at dusk. The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with a Zoom Lock Switch. Maximum Magnification - 1 - 2.3 Filter Size - Diameter 72mm Dimensions - Diameter 79mm x Length 82.5mm, 3.1 x 3.2 inch Weight - 455 grams (16.0 ounces)
Customer Reviews:
It is fantastic.......2007-11-05
No matter what I say about this lens, it is not enough to give it as much credit as it deserve. Really, I read a lot about this sigma lens before I bought it, and when it did arrive it is totally different. Check my macro shots in my flickr www.flickr.com/photos/engineeroo
worth the money!!!.......2006-11-20
I was looking for a lense that would replace my nikkor 18-55mm lens. I wanted somthing around the same zoom range, and mabe with a little more reach if possible. I spent hours looking up reviews and asking questions all over the internet! I fnially came up on the sigma 17-70mm lense, which is the perfect range!! 17mm is pretty wide-angle and its great for pretty much anything like family group shots or senic shots. and the 70mm is great for macro photos of flowers, plants and bugs all the way down to portrait close up shots. and to make the lense even better, its macro!! you will not believe how close you can focus with this lense! it will blow you away!! it will also open up a new and different world of photography for you! the lense is also very very sharp, which was the most important thing for me in finding a lens.
Overall, i highly reccomend this lens!! its an awsome all-around lens thats well worth the money!! you will not regret spending aound $300 for it. once you try it, you will fully understand what im talking about! BUY IT!!
Product Description
Sigma Corporation is pleased to announce the launch of the new 17-70mm F2.8-4.5 DC MACRO lens. It can be used with wide variety of subjects and it is an ideal large aperture standard zoom lens for digital SLR cameras featuring APS-C size image sensor. This lens has a minimum focusing distance of 7.9.. (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range. This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2..) and diameter 79mm (3.1..). It performs superbly even in relatively low light conditions indoors or at dusk. The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with Zoom Lock Switch that eliminates ..Zoom Creep.. during transportation.
Product Description
Sigma Corporation is pleased to announce the launch of the new 17-70mm f/2.8-4.5 DC MACRO lens. It can be used with wide variety of subjects and it is an ideal large aperture standard zoom lens for digital SLR cameras featuring APS-C size image sensor. This lens has a minimum focusing distance of 7.9.. (20cm) throughout the entire zoom range. Maximum magnification of 1:2.3 enables close-up photography like a macro lens. The new lens design and multi layer lens coating reduce flare and ghosting, which is a common problem with digital cameras. A Special Low Dispersion (SLD) lens and two aspherical lens elements provide excellent correction for all types of aberrations and produce a high level of optical performance throughout the entire zoom range. This lens offers a large aperture of F2.8 at 17mm wide angle and yet it is compact, with an overall length of 82.5mm (3.2..) and diameter 79mm (3.1..). It performs superbly even in relatively low light conditions indoors or at dusk. The lens design incorporates an inner focusing system, which ensures fast AF speed as well as prevents the front of the lens rotating, making it particularly suitable for use with circular polarizing filters and petal shaped lens hoods. This lens is also equipped with Zoom Lock Switch that eliminates ..Zoom Creep.. during transportation.
Customer Reviews:
Terrific Value.......2007-09-03
I recently got this lens for my Minolta 7D, but wish I had made the investment a long time ago! I'm always stepping back, stepping back, oops, my back is against the wall, trying to get more interior architecture in the frame. That is, until I got this lens! I have a 28-80 lens for a Minolta film 35mm camera that just isn't wide enough, epecially with the crop factor working against me. The versatility of the Sigma 17-70 now allows me to get everything I need in the frame and with very high quality -- plus the additional macro ability is something I didn't think I would use much, but have found the extreme close-up option really fun to experiment with. I don't see myself changing lenses much ever again!
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