Zoom vs mm

Started Jan 1, 2014 | Questions thread
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Zoom vs mm
Jan 1, 2014

Okay, this question relates to optical X zoom in relation to mm lens. I know they don't really correspond, but here goes.
I have been using the Canon sx130 is which has a 12x zoom. The sensor is 1/2.3" .
Of course with that size sensor the quality of pictures at full zoom is not quite what I want, but it gets up close.
I do a lot of outdoor stuff and there are objects, (buildings, birds, etc.) I can't get close to.

So, I decided to upgrade. I purchased the Nikon D3200. Body only. I'll get lense later. It has the APS-C sensor.
As I understand, the Canon sx130 is starting at 28mm before zoom.
So, am I right that I would need appox. 10 times the 28mm starting point to get about what would be about a 10x zoom? So, something like 300mm would get me as close (336 would be exactly 12 x 28mm)?
Or since the sensor size is bigger, can I get away with a smaller zoom to get as close, like 200mm?
Thanks. Jim

This question has not been answered yet.
Canon PowerShot SX130 IS Nikon D3200
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