Any one from mumbai having canon 1000d or nikon 3100 or aany one who can upload low light photograph
can some throw light on macro which one is better ???
For low light, I would expect the Nikon D3100 to be better than a Canon 1000d, mainly on the basis that the 1000d is a generation or two older than the Nikon D3100. If you want more detailed analysis, you can get sensor noise data on sites like dpreview.com.
In terms of macro, both Nikon and Canon are very good. With Nikon you have a big advantage in the ability to use MF lenses. You can get second hand Nikkor Macro MF lenses at bargain prices at sites like keh.com & adorama.com and some of these older generation lenses are actually better than current Nikkor macro lenses in the field. Nikon's R1 Macro flash kit is a great help too. But then Canon has lenses like the MPE-65 which are a great help when doing extreme macro.
The entry level SLRs will not have image preview in the LCD screen.
Do decide if that is a a priority for you or if you are ok with the viewfinder.
If you are using a DSLR, then be prepared to use the viewfinder to compose your shots. You should not expect to use a DSLR like a regular digicam where you compose your shots using the live video on the rear screen even if your DSLR has that feature.
Using the viewfinder to compose and take photos is better because of:
1. When you are using the viewfinder, you are using the phase detection AF module. In Live View mode, the DSLR shifts to a contrast detection mode, which is a lot less accurate and a lot slower than the primary phase detection AF module.
2. With modern 10+MP DSLRs, even the slightest camera shake will blur the final capture. Holding a DSLR like a digicam is a sure shot way to introduce additional camera shake. Having VR/IS/In camera anti shake will not help a whole lot here. The proper way to hold a SLR camera is to balance it on 3 points, your left hand under the lens, the right hand applying slight force to balance the camera on your left hand and the eye. This way you eliminate a whole lot of shake.
3. With the live view enabled, the sensor is kept on for the entire duration of your composition and this will increase noise on the final captured image on most DSLRs.
The only practical use of Live View on a DSLR that I could think up would be in these cases:
a. If you need to focus and compose a shot with the maximum control. e.g. when you are using a tripod and composing a landscape shot or a macro shot, you can easily check for focus and the scene composition to the pixel level when using live view.
b. If your camera has an articulated screen, then you can compose with the camera at angles where you can not see through the viewfinder.
Remember that a DSLR is a bulky camera and carrying it around can be a pain at times. Also in some places taking out a obvious DSLR is not very helpful for photography. Like some others have pointed out, a DSLR is not always a upgrade from a P&S camera and not necessarily what everyone buying a camera requires. It would be helpful to know what your photography objectives are when you go choosing a DSLR.
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