SuperflyTNT wrote:
Once again using “quote reply” will allow us to know who you’re responding to. What User ID was referring to when he said you’re at f/8 at 600mm was the fact that the lens has an actual focal length of 108mm. The small sensor size means that it will give you the same angle of view as a 600mm lens on a full frame camera. They call the difference the “crop factor”. Any sensor smaller than full frame has a crop factor. Your Nikons all have APS-C sensors. They have a crop factor of 1.5. That means the 18-400 lens on the D5500 is equivalent to a 27-600 lens on FF. The FZ200 has a crop factor of 5.6. The thing with the crop factor is it also applies to the aperture, not in the light capturing, but in depth of field. So while that 108mm lens at f/2.8 still works for exposure like an actual 600mm lens, the depth of field will be equivalent to a 600mm lens at over 5 stops higher, closer to f/11.
Once again using “quote reply” will allow us to kn... (
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whatdat wrote:
Oops. The d5500 wears a 18-140. However,
Bridge camera fz200 reaches to 600 with a constant 2.8.
OK - Just to be accurate, that is comparing 2 different things. The 600 is a 35mm equivalent, or it magnifies as much as a 600mm lens on a 35mm (full frame) camera. The 140 is a true 140, but with the 1.5 crop factor camera, it has a 35mm equivalent of 140 X 1.5 or 210mm.
The FZ200 is an older camera. So is the FZ80. You might want to compare them. They are both 1/2.3" sensor types.