Real Focal Length
Aug 26, 2019 04:54:23 #
rehess wrote:
But a lens set to approximately 33mm will give the same view on an APS-C camera, as will a lens set to 25mm on an MFT camera.
Not quite - MFT is a 4/3 format not 3/2. I accept that you can change the format of the M43 to 3/2, but that will mean using less of the sensor and losing pixels.
Aug 26, 2019 06:14:32 #
Delderby wrote:
To compare one with the other we need to talk same focal length. That means a crop sensor limts the FOV.
BTW, I think you mean just zoom out (wider) to get the same FOV with a crop sensor as a FF? and that means less magnification!
Manufacturers never put a 35mm equivalent on a lens. If Nikon were to put DX or FX on a lens, it would be to denote the type of camera it was designed for?
BTW, I think you mean just zoom out (wider) to get the same FOV with a crop sensor as a FF? and that means less magnification!
Manufacturers never put a 35mm equivalent on a lens. If Nikon were to put DX or FX on a lens, it would be to denote the type of camera it was designed for?
They do put DX on their DX format lenses.
Aug 26, 2019 12:26:26 #
CO wrote:
They do put DX on their DX format lenses.
Yes - so I see. Never done Nikon, but that shows they want to sell the correct lens for the correct camera.
Aug 26, 2019 13:06:17 #
SuperflyTNT wrote:
I disagree. Yes when you’re shooting, especially now that zooms are so prevalent, you just frame and shoot, but when buying a lens or choosing which lens to use in a particular situation it can be pretty useful information.
How so......most people will buy a lens designed for their camera therefore it is not useful.
Aug 26, 2019 13:09:42 #
CO wrote:
They do put DX on their DX format lenses.
That marking is for the buyer so he'll know that the lands he's buying we'll be for his camera. A lens marked DX is designed for a DX body.....
Aug 26, 2019 17:01:48 #
CO wrote:
They do put DX on their DX format lenses.
That specifies minimum image circle provided by the lens; it has nothing to do with focal length embossed on the lens.
Aug 26, 2019 17:10:21 #
rehess wrote:
That specifies minimum image circle provided by the lens; it has nothing to do with focal length embossed on the lens.
Yes. I'm very aware of that. I have two Nikon DX cameras and Nikon DX lenses. I also have a Nikon full frame (FX) camera and two Nikon full frame lenses.
Aug 26, 2019 17:12:59 #
frankraney wrote:
That marking is for the buyer so he'll know that the lands he's buying we'll be for his camera. A lens marked DX is designed for a DX body.....
Yes. I'm very aware of that also. A have two Nikon DX cameras and DX lenses. I also have a Nikon full frame (FX) camera and two Nikon full frame lenses.
Aug 26, 2019 18:04:34 #
For your entertainment and enlightenment, Zack Arias has made a video peripherally related to this discussion.
Needless to say, it takes a different range of focal lengths on each format to achieve the same range of fields of view.
https://youtu.be/PHYidejT3KY
Needless to say, it takes a different range of focal lengths on each format to achieve the same range of fields of view.
https://youtu.be/PHYidejT3KY
Aug 26, 2019 21:54:59 #
Aug 26, 2019 23:10:23 #
TonyBot wrote:
Whew
We got through it with only eight pages this time!
We got through it with only eight pages this time!
What makes you think we’re done?
Aug 26, 2019 23:16:19 #
frankraney wrote:
How so......most people will buy a lens designed for their camera therefore it is not useful.
I own several cameras. There are several lenses designed for those cameras. They come in a multitude of focal lengths. Each of those lenses will give me different coverage based on those focal lengths. It’s pretty useful to me to know that I can buy a 35mm lens for my Nikon D500 that will give me similar coverage to a 50mm lens on a full frame, and that I can buy a 25mm lens to give me similar coverage with my Lumix G9. Is that really hard to understand?
Aug 27, 2019 00:09:50 #
I mostly shoot with a SONY fx and dx camera. with the dx I use a dx16-80mm zoom to get wide angle shots. for everything else I use fx lenses WHY? because I get my pick of hi-quality Minolta maxxum lenses at good prices from KEH..
Aug 27, 2019 03:26:55 #
As the pixel count continues to increase in our cameras, both FF and Crop, the importance of differences in focal length will largely disappear. We will be able to digitally zoom with plenty of pixels left to maintain a high IQ and required FOV, either in camera or PP, and have left only problems associated with maintaining desired DOF and bokeh to discuss.
Aug 27, 2019 09:12:45 #
SuperflyTNT wrote:
I own several cameras. There are several lenses designed for those cameras. They come in a multitude of focal lengths. Each of those lenses will give me different coverage based on those focal lengths. It’s pretty useful to me to know that I can buy a 35mm lens for my Nikon D500 that will give me similar coverage to a 50mm lens on a full frame, and that I can buy a 25mm lens to give me similar coverage with my Lumix G9. Is that really hard to understand?
No, it makes perfect sense!
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.