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Can someone plz explain digital lense?
For the digital camera gurus ... can somebody explain to me the real translation of lens size from normal 35mm film lens to digital cameras?
What I mean is this. In this 35mm world ...
a 50mm lens is normal 1x ... what your eyes see in real life in terms of degrees
a 200mm lens is 4x meaning that an object 4 times farther away from you will look like its right ther
as 500mm lens is 10x, etc.
The inverse inverse is true for wide angle
24 mm is much ider but looks farther away than you really are etc.
Now ... from what I understand, the sensor size on all but the most expensive DSLRs are 1.5 or 1.6 conversion factor because they are much smaller than a 35mm negative.l
Thus ...
using a 50mm your image is cropped ... your missing the stuff on the side so for 1.6 conversion its really, in terms of width, more like a 80 mm lens ... EXCEPT you do NOT get the magnification of an 80? True?
In other words, a 200 mm (4x) using a 1.6 conversion yields the "image" area you would see in a 329 mm lens but your still only 4x closer ... that bear doesn't look any closer unless you buy a 300 mm lens but the image would again be cropped more.... TRUE????
The inverse would hold true on wide angles.
If a kit lens said 18mm lens its really a 29mm len (not really wide at all) so if you really wide a wide angle, say a 24mm you would need to buy a 15mm lens ... True?
Is this making any sense?
I ask because I read ppl writing their 200 mm lens is really like a 320mm lense and think ... yes, in terms of image size ... no in terms of getting any closer to the subject. ... its not 6x.
Any one?
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