Is Macro Photography still necessary - even if popular?
Jun 2, 2017 17:03:38 #
Linary wrote:
Before I come back to respond to some of the answers, I would like to ask a question: My cameras are all Nikon crop cameras, which obviously means that if I bought a 105mm Macro lens (FX), normal photography would give the field of view of a 157mm lens. That's fine, but what happens to the 1:1 when in Macro mode? does it change?
I would think you would have 152 1/2 mm macro equal lens for your dx
Jun 2, 2017 18:57:15 #
Linary
Loc: UK
IBM wrote:
I would think you would have 152 1/2 mm macro equal lens for your dx
I do understand what happens to the field of view when using a crop (DX) camera with normal lenses, multiply the focal length x crop factor (i.e. 100mm x 1.5 = 150mm); and as all my cameras are DX, it does not matter; what I did not understand is what happens to the magnification on a DX camera. All the lenses I have been looking at are FX, and none of the specifications mention the effect of using a smaller than full frame sensor sensor on the 1:1 aspect.
Wdross has answered my question, but thank you for looking.
Jun 2, 2017 19:48:53 #
Linary wrote:
Before I come back to respond to some of the answers, I would like to ask a question: My cameras are all Nikon crop cameras, which obviously means that if I bought a 105mm Macro lens (FX), normal photography would give the field of view of a 157mm lens. That's fine, but what happens to the 1:1 when in Macro mode? does it change?
The crop factor is 1.5 when you use an FX lens on a DX camera. That means that 100mm has an apparent focal range of 150mm. I say "apparent" because a 100mm lens is still taking a picture that is dictated by that focal length. What makes the difference is that the crop camera's sensor cannot read the full diameter of the FX lens the same as the FX camera will. If you check out the specifications of an FX lens, it will give you the "angle of view" for use on both FX and DX cameras. Note that the angle of view is less when used on a DX camera. Hence the "crop" of the image with respect to what it would have been if using the FX camera.
[FX] Angle of View 23° 20'
DX Picture Angle: 15°
This is not really a disadvantage, it means that when you fill the viewfinder with the subject, that subject is going to cover the entire DX sensor. If you were at the same distance from that subject with the same focal length lens, and using an FX camera, the subject would be the same size, but would not take up the whole FX sensor. Considered to be equivalent to "cropping in the camera". Before I purchased the D810, I was using my 150mm macro lens on the D7000. Results were as you saw in the images I posted and sent to you.
When using an FX zoom lens on a DX camera, the same principle applies at both ends of the focal range. As a result my 24-70mm lens will be "cropping" the image equivalent to 36-105mm. So while there is an apparent gain at the long end of the focal length range, you lose that wider angle at the lower end of the focal range. I was happy with the lens on the crop camera, but now on a FF camera, I LOVE it!
Susan
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