Effective focal length
Dec 1, 2013 12:44:12 #
Pepper wrote:
Okay you got me, what does this have to do with the original post????
Those legs are cropped, giving him a longer effective body length?
Seriously, a more accurate way to express the differences would be by using angle of view measurements, but that is yet another set of numbers to know about. Even people who know the difference drop the "equivalent" wording and say "becomes". I know what they mean, but we are not all of the same experience level and forget there are newbies out there who take the mis-information on this site as gospel.
Dec 1, 2013 12:54:13 #
Pepper
Loc: Planet Earth Country USA
GoofyNewfie wrote:
Those legs are cropped, giving him a longer effective body length?
That's funny and brings you back on topic, good one! :thumbup:
Dec 2, 2013 07:15:20 #
photo169 wrote:
A lot of people are fooled by the camera manufactures so called 1.5 or 1.6 etc. factors for their camera bodies. Example, a 100mm lens used on a 1.5x body does not give you a 150mm lens. It only gives you an angle of view like a 150mm lens which in reality is only cropping your 100mm angle of view.It does not make your lens a 150mm.
:thumbup:
Dec 2, 2013 07:50:32 #
photo169 wrote:
A lot of people are fooled by the camera manufactures so called 1.5 or 1.6 etc. factors for their camera bodies. Example, a 100mm lens used on a 1.5x body does not give you a 150mm lens. It only gives you an angle of view like a 150mm lens which in reality is only cropping your 100mm angle of view.It does not make your lens a 150mm.
All I know is that if I take the same photo using the same lens on my FX and DX body cameras, the DX will show are a more tele view and the FX a wider view. Assuming I had the same number of pixels on each sensor, I would be getting the same resolution on both. I'm not seeing here how anything has been cropped. Yes, you can take the same angle of view from the FX, crop it to be the same as the DX and then fill the frame, but now you have less resolution. What am I missing here?
Dec 2, 2013 07:53:19 #
banjonut wrote:
All I know is that if I take the same photo using the same lens on my FX and DX body cameras, the DX will show are a more tele view and the FX a wider view. Assuming I had the same number of pixels on each sensor, I would be getting the same resolution on both. I'm not seeing here how anything has been cropped. Yes, you can take the same angle of view from the FX, crop it to be the same as the DX and then fill the frame, but now you have less resolution. What am I missing here?
Sounds good to me. Here's a link to the Nikon lens simulator.
http://imaging.nikon.com/lineup/lens/simulator/
Dec 2, 2013 08:35:36 #
Jersey guy
Loc: New Joisey
photo169 wrote:
A lot of people are fooled by the camera manufactures so called 1.5 or 1.6 etc. factors for their camera bodies. Example, a 100mm lens used on a 1.5x body does not give you a 150mm lens. It only gives you an angle of view like a 150mm lens which in reality is only cropping your 100mm angle of view.It does not make your lens a 150mm.
You're right, technically, but I wouldn't fault the manufacturers quite yet. To my knowledge, they almost universally use language like, "equivalent focal length".
Dec 2, 2013 08:40:59 #
As others here have noted this is true. However, there are some benefits for wildlife shooters. I'll use the example of my Canon 7D. All of my 18 megapixels are on that smaller space afforded by the APS sensor. When I take a shot and crop it I don't lose as many of those pixels as a full-frame shooter does when they crop a photo to the point where our final images are the same apparent size. An added, although minute, benefit is I get to shoot through the center (sweet spot) of my full-frame (L glass) lenses.
photo169 wrote:
A lot of people are fooled by the camera manufactures so called 1.5 or 1.6 etc. factors for their camera bodies. Example, a 100mm lens used on a 1.5x body does not give you a 150mm lens. It only gives you an angle of view like a 150mm lens which in reality is only cropping your 100mm angle of view.It does not make your lens a 150mm.
Dec 2, 2013 08:41:02 #
Yes and no. Check out this very informative article comparing Canon 5D MII to 7D. Especially note the side by side comparison when the 5D is cropped to match the 7D angle of view. Because the 7D pixels are smaller, the end result is 5D at 8.2mp vs 7D at 18mp.
http://www.ormsconnect.co.za/2012/03/image-quality-comparison-5d-mk-2-vs-7d/
http://www.ormsconnect.co.za/2012/03/image-quality-comparison-5d-mk-2-vs-7d/
Dec 2, 2013 08:44:45 #
Dec 2, 2013 09:07:46 #
Jersey guy wrote:
You're right, technically, but I wouldn't fault the manufacturers quite yet. To my knowledge, they almost universally use language like, "equivalent focal length".
And the focal lengths are clearly marked on the lenses.
Dec 2, 2013 09:13:20 #
LOL! Three seconds actually. Maybe some more crop sensor fans will chime in. There are some great UHH shooters using them.
RolandComfort wrote:
Mr B, you and I agree. Guess we posted 1 minute apart. Love the 7D.
Dec 2, 2013 09:36:36 #
I am relatively new to digital photography, although I had some experience with 35 mm photography years ago.
When I went to purchase a digital camera I asked about this 1.5 magnification stuff about which I had heard and which I did not understand. (I don't recall the exact words I used to frame my question.)
The man working at the store was very clever about how he answered. He just said, "It is an SLR. Look through the lens and what you see should be close to what you get."
That was a nice non-technical way of talking about this issue and probably made sense for most non-technical purchasers.
I guess that if I had two cameras which could share lenses, and one of the cameras was a full frame camera, the "angle of view" stuff would start to have real world impact upon my choice of lenses. But I don't have two cameras with which to share lenses. So, for me -- a beginner -- the advice to just look through the view finder (or on the screen) and see what I see might be enough.
When I hold my camera/lens combination in my hand, the fact that the same lens would produce a differently framed image on a full frame camera is more theoretical than interesting -- at least for a beginner like me.
When I went to purchase a digital camera I asked about this 1.5 magnification stuff about which I had heard and which I did not understand. (I don't recall the exact words I used to frame my question.)
The man working at the store was very clever about how he answered. He just said, "It is an SLR. Look through the lens and what you see should be close to what you get."
That was a nice non-technical way of talking about this issue and probably made sense for most non-technical purchasers.
I guess that if I had two cameras which could share lenses, and one of the cameras was a full frame camera, the "angle of view" stuff would start to have real world impact upon my choice of lenses. But I don't have two cameras with which to share lenses. So, for me -- a beginner -- the advice to just look through the view finder (or on the screen) and see what I see might be enough.
When I hold my camera/lens combination in my hand, the fact that the same lens would produce a differently framed image on a full frame camera is more theoretical than interesting -- at least for a beginner like me.
Dec 2, 2013 09:41:27 #
jgordon wrote:
The man working at the store was very clever about how he answered. He just said, "It is an SLR. Look through the lens and what you see should be close to what you get."
Best answer I've ever heard! :thumbup:
Dec 2, 2013 09:54:15 #
photo169 wrote:
A lot of people are fooled by the camera manufactures so called 1.5 or 1.6 etc. factors for their camera bodies. Example, a 100mm lens used on a 1.5x body does not give you a 150mm lens. It only gives you an angle of view like a 150mm lens which in reality is only cropping your 100mm angle of view.It does not make your lens a 150mm.
Yes, indeed. And FF/35mm owners are fooled in to believing that their 85mm lens is equivalent to a 120mm Hasselblad whereas all they really have is a crop of "normal" lens.
Hopefully no view camera users will respond to this thread!!
Dec 2, 2013 10:21:47 #
[quote=MW]Yes, indeed. And FF/35mm owners are fooled in to believing that their 85mm lens is equivalent to a 120mm Hasselblad whereas all they really have is a crop of "normal" lens.
What does this mean? Hasselblad 120 mm lens?
What does this mean? Hasselblad 120 mm lens?
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