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Stop this crop factor / equivalent focal length nonsense
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Jul 30, 2019 07:08:32   #
SpikeW Loc: Butler PA
 
Yes---my brain cells are old along with the rest of my body so excuse me if I just move on.

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Jul 30, 2019 07:08:39   #
Longshadow Loc: Audubon, PA, United States
 
RWR wrote:
If you told someone you took a picture with a 10 degree angle of view, they’d walk away shaking their head.


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Jul 30, 2019 07:12:34   #
tommy2 Loc: Fort Worth, Texas
 
Not poking the bear here, just my 2 cents worth: FoV is a spec right up there with mm when looking for a new/different lens for my photography hobby enjoyment. I've traded perfectly good lenses of the same mm to get a more appropriate FoV (greater most of the time) for what I want to capture. Current cameras work with so many pixels cropping isn't much of a concern.

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Jul 30, 2019 07:12:35   #
Notorious T.O.D. Loc: Harrisburg, North Carolina
 
And my answer was going to be slightly less than 11 inches...😎

ggab wrote:
Yes. 10.8268

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Jul 30, 2019 07:16:36   #
billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
 
repleo wrote:
We could avoid all of this ‘crop factor’ and ‘equivalent focal length’ confusion and nonsense if we all started thinking and expressing in terms of ‘Angle of View’ (AoV) or ‘Field of Vision’ (FoV) instead of the Focal Length of the lens. For example, if you were to say ‘I took this shot with my 7 degree lens’ it wouldn’t matter if you were referring to a 300mm FF, 200mm APS-C, or 150mm MFT or 380mm Medium Format. The AoV is what determines what is in your capture. As we are constantly reminded, the focal length of the lens stays the same regardless of what body it is mounted on and ‘crop factor’ is a somewhat misleading or even meaningless term. These days, the only thing ‘focal length’ info is good for is to know what size bag you need to carry.
Of course this change in habit would burn up a few brain cells for most ‘old timers’ and goodness knows, brain cells are in short supply here on UHH.
We could avoid all of this ‘crop factor’ and ‘equi... (show quote)


O boy. Now we can use new acronyms. AOV, FOV, EFL, CF. More acronyms to further confuse those new to photography who come here for guidance. Thank u, cannot wait to start using them instead of spelling them out. THANK YOU, THANK YOU, THANK YOU.
The question is, should we use AoF or AOF, and should we use FoV or FOV, or fov and even aof. I am confused already. I shall return after more coffee.

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Jul 30, 2019 07:18:05   #
Grey Ghost
 
Delderby wrote:
Your last paragraph proves you to be rude and ignorant. BTW - with a given lens, the FOV changes with crop factor, but you would not, of course, know that with your box brownie.


Now now children!! Let’s behave!

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Jul 30, 2019 07:19:10   #
hippi Loc: Sedalia MO
 
here is my take on this world today 1, Buddy Guy https://www.youtube.com/watch?v=txPfGVK-Alo and Buddy is 83 today
2, Scorpions - Under The Same Sun https://www.youtube.com/watch?v=0pQISeHRPFE

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Jul 30, 2019 07:20:01   #
Architect1776 Loc: In my mind
 
repleo wrote:
We could avoid all of this ‘crop factor’ and ‘equivalent focal length’ confusion and nonsense if we all started thinking and expressing in terms of ‘Angle of View’ (AoV) or ‘Field of Vision’ (FoV) instead of the Focal Length of the lens. For example, if you were to say ‘I took this shot with my 7 degree lens’ it wouldn’t matter if you were referring to a 300mm FF, 200mm APS-C, or 150mm MFT or 380mm Medium Format. The AoV is what determines what is in your capture. As we are constantly reminded, the focal length of the lens stays the same regardless of what body it is mounted on and ‘crop factor’ is a somewhat misleading or even meaningless term. These days, the only thing ‘focal length’ info is good for is to know what size bag you need to carry.
Of course this change in habit would burn up a few brain cells for most ‘old timers’ and goodness knows, brain cells are in short supply here on UHH.
We could avoid all of this ‘crop factor’ and ‘equi... (show quote)



No way would I do this.

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Jul 30, 2019 07:28:11   #
ggab Loc: ?
 
sloscheider wrote:
Actually this is his point, it does NOT matter what sensor size if you simply state the AoV. A 90mm lens would offer a different AoV for every different sensor size therefore a 7 degree AoV is the ONE single measurement that would be consistent across all sensor sizes regardless of focal length/sensor size employed.

That said, I agree it’s not worth invoking another possibly equally confusing measurement lol


And exactly what lens would that 7 degree AoV be?? It would be a different lens for a person with a crop sensor camera than a person with a full frame sensor camera.
To determine the actual lens, for full frame sensor or crop you either need a chart, do the math or memorize. No Thank You.

Ugh I can't believe I am responding, helping to continue this drivel.

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Jul 30, 2019 07:29:58   #
John Howard Loc: SW Florida and Blue Ridge Mountains of NC.
 
JohnSwanda wrote:
But the focal length means nothing if you don't know what the sensor size is.


Exactly. A Nikon fx lens on a full frame sensor will have a different angle of view than if put on a DX camera. So you then have two different angles of view. Original post was incorrect. You would need to quote the DX angle of view in a form of 35mm (fx) equivalent.

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Jul 30, 2019 08:03:17   #
JDG3
 
Move along folks, nothing to see here.

These are not the droids we are looking for.

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Jul 30, 2019 08:04:34   #
Linda S.
 
jdedmonds wrote:
It is so disheartening for this old timer to see that the tribal, name-calling incivility that gave us our current
"president" abounds on this forum. Here's a bulletin: nobody, and I mean nobody, is going to experience a significant improvement in their individual life nor in our disastrous political climate until people stop reactionary behavior and start thinking about facts, until they stop this kindergarten of name-calling and repeating slogans, until they begin to regard their fellows as worthy of authentic consideration.
It is so disheartening for this old timer to see t... (show quote)


Thank you for posting this ... a breath of fresh air!

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Jul 30, 2019 08:31:51   #
repleo Loc: Boston
 
John Howard wrote:
Exactly. A Nikon fx lens on a full frame sensor will have a different angle of view than if put on a DX camera. So you then have two different angles of view. Original post was incorrect. You would need to quote the DX angle of view in a form of 35mm (fx) equivalent.


The AoV of the picture is the AoV of the picture. 40 degrees is 40 degrees regardless of what lens / sensor combo is used. Try to think of it in terms of the picture not the equipment. Start with what you want then figure out how to get there. You do it subconsciously all the time - you just don't realize it.

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Jul 30, 2019 08:41:32   #
NBBPH Loc: Indiana
 
The only time I think about crop factor/focal length is when I buy a lens. It helps me put the lens in the proper gamut that I was used to in 35 mm. I wind up with a wide angle zoom, a mid range zoom, and a telephoto zoom. Once the lens is purchased I just use it and forget about all the rest.

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Jul 30, 2019 08:43:59   #
Longshadow Loc: Audubon, PA, United States
 
NBBPH wrote:
The only time I think about crop factor/focal length is when I buy a lens. It helps me put the lens in the proper gamut that I was used to in 35 mm. I wind up with a wide angle zoom, a mid range zoom, and a telephoto zoom. Once the lens is purchased I just use it and forget about all the rest.

Ditto.

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