Sunday, August 18, 2013

Can you help me understand what the camera sensor is and what lens I should buy?

canon digital camera xs on ... on Canon Rebel T2i Eos 550d Digital Camera With 18 135mm Lens Digital
canon digital camera xs image



K


I've been doing photography for a few years but I don't really know much about lenses and how the camera sensor works. I have a canon digital rebel xs and I want to buy a standard lens. My photography teacher said I should get a canon 35mm wide angle lens and he tried to explain to me why that was the standard lens for my camera and how the camera sensor is cropped, but I still don't really understand it. Can you please try to explain it to me?


Answer
I would consider Canon EF-S 18-200mm f/3.5-5.6 IS Standard Zoom Lens for Canon DSLR Cameras
Standard zoom lens; 18-200mm f/3.5-5.6
Canon's Optical Image Stabilizer technology allows sharp hand-held shots at shutter speeds up to four stops slower than otherwise possible
11 elements in 9 groups; aspherical lens element to correct aberration
For EOS 50D, 40D, 30D, 20D, 20Da, Rebel XSi/XS, Digital Rebel XTi/XT and Digital Rebel cameras

http://www.amazon.com/Canon-18-200mm-3-5-5-6-Standard-Lens/dp/B001ET6QFY/?tag=nktf-20

http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5574865779&toolid=10001&campid=5336440665&customid=nktf&mpre=http%3a%2f%2fshop.ebay.com%2fi.html%3f_nkw%3dCanon%2bEF-S%2b18-200mm%26_sacat%3d0%26_odkw%3dlens%2bfor%2ba%2bNikon%2bD90%26_osacat%3d0%26_trksid%3dp3286.c0.m270.l1313

Is it bad to use the same lens from a film camera to a digital?




ktina


I just got a Canon Rebel XTI with a 18-55 mm + a 75-300 lens. I have a Canon Rebel XS with a 70-210 lens. I would like to use the middle size lens with the digital camera but am not sure if it could hurt the digital. The cameras kindof expensive to try something that I'm unsure of. A kid at circut city told me it wasn't a good idea, but he also said he didn't specialize in cameras.


Answer
No. It would work perfectly fine.

The digital Canon Rebel XTi has a metal EF/EF-S lens mount. It can use the full range of Canon EF lenses as well as the designed-for-digital EF-S lenses. Your 70-210mm lens, that you used in the film camera (Canon Rebel XS), is an EF lens.

The digital Canon Rebel XTi's sensor is smaller than a 35 mm frame. So all lenses are subject to a field of view crop (sometimes called focal length multiplier) of 1.6x. Effectively your 70-210mm lens will become 112-336mm lens.

Typically the defects of lenses are exposed on the outer frame edges. Since the digital Canon Rebel XTi sensor uses a smaller frame than the 35mm, any edge defects of the lens are going to be thrown away. So, in theory, you should be able to take real nice images with the 70-210mm, better than you did with the film camera. And as a bonus, your zoom has more reach with the digital.

Good luck.

- Elan Elango
http://www.dslrgossip.com




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