If money is no object go for the new 800mm it is only $12,000.00. If you don't like it I wouldn't mind giving it a try.
Seriously though figure out what it is that you like to shoot and get the lenses that will help you achieve this. The best lenses will be Canon's L series professional lenses. If these are to much find the fastest lens you can afford. Below is a list of lenses for different situations. I hope this helps.
Portraits: 50mm F1.8, 1.4 or 1.2 L
Macro: 100mm F2.8,
Landscape: EFs 10-22mm. This is the best lens for your camera. The other wide angle lenses were designed for the full frame cameras and on your camera wont be wide enough because of the crop factor.
Telephoto Zoom: 70-300mm F4-5.6 IS, 70-200mm F4L, 70-200mm F2.8L IS
yah... without knowing what you want the lenses for, buy the L lenses, the most expensive ones -- the ones that are painted white, or black with a little red line. the smaller the f-number, the more light they let in, but they're heavier to carry around. every lens canon sells will fit that camera. Have Fun!
...if they are the exact same camera, obviously go for the one with all the accessories. Unless the lenses are total crap. If they are a different body, go for the one with the best lenses. It is better to have an okay body and an excellent lens than an excellent body and an okay lens. The lens is what really makes the image, you see.
Not quite as much of a wide angle, the Canon Zoom Wide Angle-Telephoto EF 24-105mm f/4L IS USM Autofocus Lens (2007-$1,060) is a pretty good all-around lens. This review says, "If I had only one lens, this would be the one," but I think he is using it on a 35 mm camera.
I really like my Nikon 17-55 and Canon makes a comparable lens, the Canon Zoom Super Wide Angle EF-S 17-55mm f/2.8 IS USM Autofocus Lens. It's not an "L" lens, but it seems popular. I just read in PopPhoto (November 2007) that the only reason this is not designated an "L" lens is because it will not work with the full format sensors.
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If money is no object go for the new 800mm it is only $12,000.00. If you don't like it I wouldn't mind giving it a try.
Seriously though figure out what it is that you like to shoot and get the lenses that will help you achieve this. The best lenses will be Canon's L series professional lenses. If these are to much find the fastest lens you can afford. Below is a list of lenses for different situations. I hope this helps.
Portraits: 50mm F1.8, 1.4 or 1.2 L
Macro: 100mm F2.8,
Landscape: EFs 10-22mm. This is the best lens for your camera. The other wide angle lenses were designed for the full frame cameras and on your camera wont be wide enough because of the crop factor.
Telephoto Zoom: 70-300mm F4-5.6 IS, 70-200mm F4L, 70-200mm F2.8L IS
General Purpose 28-135mm F3.5-5.6 IS USM
If price had been no bar, then you have several excellent models of Canon DSLR's above the Rebel XSi, Canon's entry level DSLR camera.
As for best extra lenses - it depends on what types of photos you are wanting to take?
Portraits?
Still-lifes?
Macro?
Sports?
Scenics?
The possible answers are almost endless, as are the lens combinations to suit them.
If we knew your interests (and your experience level), we'd be better able to help.
yah... without knowing what you want the lenses for, buy the L lenses, the most expensive ones -- the ones that are painted white, or black with a little red line. the smaller the f-number, the more light they let in, but they're heavier to carry around. every lens canon sells will fit that camera. Have Fun!
...if they are the exact same camera, obviously go for the one with all the accessories. Unless the lenses are total crap. If they are a different body, go for the one with the best lenses. It is better to have an okay body and an excellent lens than an excellent body and an okay lens. The lens is what really makes the image, you see.
Canon Lenses and Reviews
http://www.the-digital-picture.com/Canon-Lenses/
(See "Recommendations" on this page)
http://www.photo.net/canon/#lense
http://www.wlcastleman.com/equip/reviews/index.htm
http://www.photozone.de/active/news/index.jsp
http://www.bobatkins.com/photography/index.html
http://www.fredmiranda.com/
http://forums.dpreview.com/forums/forum.asp?forum=...
The Canon EF-S 17-85mm f/4-5.6 IS USM (28-135 equiv.) (October 2007-$515) is a good "walk around" lens at a good price.
http://www.usa.canon.com/consumer/controller?act=M...
http://www.the-digital-picture.com/Reviews/Canon-E...
Not quite as much of a wide angle, the Canon Zoom Wide Angle-Telephoto EF 24-105mm f/4L IS USM Autofocus Lens (2007-$1,060) is a pretty good all-around lens. This review says, "If I had only one lens, this would be the one," but I think he is using it on a 35 mm camera.
http://www.the-digital-picture.com/Reviews/Canon-E...
Excellent general purpose lens: Canon Zoom Wide Angle-Telephoto EF 24-70mm f/2.8L USM Autofocus Lens (April 2007-$1,140)
http://www.the-digital-picture.com/Reviews/Canon-E...
I really like my Nikon 17-55 and Canon makes a comparable lens, the Canon Zoom Super Wide Angle EF-S 17-55mm f/2.8 IS USM Autofocus Lens. It's not an "L" lens, but it seems popular. I just read in PopPhoto (November 2007) that the only reason this is not designated an "L" lens is because it will not work with the full format sensors.
http://www.bobatkins.com/photography/reviews/ef-s_...
http://www.popphoto.com/inpopularphotography/4617/...
what do you want? Extra zoom, or wide angle? Maybe a macro lense or what? I wish my life had no price bar.