Nikon Long Lens capture size. 300mm vs. 600mm
Jan 21, 2018 15:49:14 #
If I use each lens to shoot the same bird, each lens from it closest focus distance the 600 mm will give me almost double the size (bird filling the frame) even though I have to be 14' away (600mm) vs. 4' (300mm). Thanks.
300mm PF
Angle of View 8° 10'
DX Picture Angle: 5° 20'
Minimum Focus Distance 4.6' (1.40 m)
Magnification 0.24x
Maximum Reproduction Ratio 1:4.17
600MM
Angle of View 4° 10'
Minimum Focus Distance 14.4' (4.39 m)
Magnification 0.14x
Maximum Reproduction Ratio 1:7.14
300mm PF
Angle of View 8° 10'
DX Picture Angle: 5° 20'
Minimum Focus Distance 4.6' (1.40 m)
Magnification 0.24x
Maximum Reproduction Ratio 1:4.17
600MM
Angle of View 4° 10'
Minimum Focus Distance 14.4' (4.39 m)
Magnification 0.14x
Maximum Reproduction Ratio 1:7.14
Jan 21, 2018 16:04:37 #
par4fore wrote:
If I use each lens to shoot the same bird, each le... (show quote)
No, it is the opposite, the 300 mm lens will give you the bigger bird in the picture.
http://www.scantips.com/lights/fieldofview.html#top
Jan 21, 2018 16:11:52 #
Look at the magnification ratios - 0.14 vs 0.24 - the 300mm wins. The 600 just doesn't focus close enough.
Jan 21, 2018 16:34:26 #
Steve Perry wrote:
Look at the magnification ratios - 0.14 vs 0.24 - the 300mm wins. The 600 just doesn't focus close enough.
Where do the meet / cross over? Thanks!
Jan 21, 2018 16:40:53 #
par4fore wrote:
Where do the meet / cross over? Thanks!
They meet when you place the 300 mm 7 feet from the subject.
Jan 21, 2018 18:32:14 #
JPL wrote:
They meet when you place the 300 mm 7 feet from the subject.
Thanks for all the info.
Jan 22, 2018 09:53:02 #
You may be able to use a close up extension tube or diopter lens on your 600mm to allow focusing at ~4' which would give a larger image of the bird. Good luck
Jan 22, 2018 22:45:22 #
Jan 23, 2018 07:32:32 #
An extension tube won't help on a 600mm. As focal length increases, you need more and more extension for close focusing. That's one of the reasons a 600mm doesn't focus very close natively.
You can figure it out by dividing the extension by the lens focal length. So, even 25mm of extension on a 600mm lens would only add 0.04 to the reproduction ratio. Even 50mm - which is really huge, only adds 0.08X.
You can figure it out by dividing the extension by the lens focal length. So, even 25mm of extension on a 600mm lens would only add 0.04 to the reproduction ratio. Even 50mm - which is really huge, only adds 0.08X.
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