Well, I didn't mean to offend anyone, and I will definitely apologize to you, I do have much to learn, and I thought I understood this subject, but I have to listen to the more Experienced Photographers.

If My Understanding of ISO is wrong, what does control or affect the "Brightness" of the "Light that reaches the Sensor after passing thru the #1-the Aperture and then #2-the Shutter?
Would it not be reasonable to say that the "Brightness" of the Light reaching the Sensor is controlled by the final aspect of the "Exposure Triangle", which is #3-the ISO.
That logically, ISO is the ONLY thing left in the 3 ingredients or parts of the Exposure Triangle.
And Yes, I still would apply the word "Sensitivity" with "ISO", the Sensitivity of the ISO would be the final determination of how BRIGHT or DARK your Image will appear.

I do not want to Battle with ANY of my UHH Members.
Sometimes our way of Thinking or whatever, create some BRISK DISCUSSIONS.
Sometimes I just feel I am correct in my thinking on a Subject and other times I have No Idea how to reply to my fellow UHH Pals. But I always appreciate learning from others here. Thanks

No not accurate

Ok, So 50mm is the Size or Length of the Lens and the Aperture is what Controls How much LIGHT enters the Lens on it's way to the Shutter, which Controls how much LIGHT Reaches the Sensor, finally the ISO controls the Sensitiveity of the Light On the Sensor. How did I Do? Did I Pass the Test, a "B" for BETTER

Florida?

Looks to me like it is from the Mid to late 1950's, by the Styling.

Then explain to me when they say on Nikon Crop-Sensor Camera you must use the Aperture of the Lens (50mm) and Multiply it by 1.5 and that equals approximately 75mm, now what is the 75mm. Why does it really matter? Just put the 50mm on the Crop-Sensor and Shoot, if you with your Crop-Sensor Camera stood next to a Photographer with a Full Frame Camera and you both shoot a image of 1968 Ford Mustang, both with a 50mm lens that is exactly 6 yards in front of you, would both those two images look exactly the same?....NO.....
.....One would look closer than the other, Correct?
What is that called, when looking thru the 50mm Lens, with either F.F. or Crop-Sensor Camera?
Would that Not be considered to be your "Field of View" or F.O.V.?

By the Way,..What is "Selmslie"

Ok, Put your 50mm Lens on a Nikon Crop-Sensor Body. Next Look thru the Lens. Ask yourself, Am I Seeing or experiencing the Same exact "View" thru the Lens, as It Looked when I had the 50mm lens on the Full Frame Camera body??
Why is the Suggestion made when using a Nikon Crop-Sensor Body and a 50mm lens, that you need to Multiple the 50mm Lens x 1.5 which equals the approximate View of a 75mm Lens, what does that new 75mm number now Represent?? F.O.V., A.O.V., or D.O.F.
Why? Is this ( my Understanding ) so Wrong?
Yes, the 50mm Lens DOES NOT suddenly change into a 75mm Lens, it is just the Closer Distance we Experience or Precieve with the 50mm Lens on the Crop-Sensor Body with the Smaller Sensor.
I hope I am making sense to this Seemingly Difficult or hard to understand Subject.
It would have been SO MUCH EASIER if Camera manufacturer's just got rid of all the "Crop-Sensor" Cameras and we all just had Full-Frame Cameras.

I give up trying to make sense to all these Experts.
A 50mm lens on a Crop-Sensor Camera Body provides the Photographer a NEW F.O.V. which is the applied Formula of the Aperture of the lens on the camera, which in this case is a 50mm lens, you multiple that Aperture of 50mm x 1.5 ( for Nikon Crop-Sensor Cameras) which will equal approximately a 75mm F.O.V. Looking thur the 50nm lens.
This change in the F.O.V. occurs due to the Crop-Sensor Camera has a smaller Sensor size than a Full -Frame Camera,
If that Same exact 50mm lens was mounted on a FULL-FRAME Camera, the F.O.V. would be 50mm, due to the FULL-FRAME Camera has a regular full sized Sensor.

Now I agree with that conclusion.
My understanding is that the SENSOR size affects what you view thru the lens that is on the camera at the time the image is created.
So when you have a 50mm Lens on a Crop-Sensor Camera Body, {Ex.= my Nikon D3300}, you will have an equivalent "Field of View" F.O.V. of looking thru a 75mm Lens, due to the applied "CROP-FACTOR" of 50mm x 1.5= 75mm.
Now, some Photographers feel it should be considered as a new "Depth-of-Field" D.O.F. which I am not sure is a correct understanding.
Also, If D.O.F. is a Correct description of this Crop-Factor on the D3300 and other Crop-Sensor Cameras, please provide a further explanation.

Thank You for your contribution, that is an excellent illustration showing the aspect of Crop-Sensor Photography.

Thanks, it's all over my Head, I suppose when I put my Nikon 50mm 1.8g Lens on my Nikon D3300 "Crop-Sensor Camera it is still only a 50mm 1.8g lens, but when I go to take a Picture of the Lamp on the Living room Table I seem to need to back up a few steps to get the whole lamp correctly in my View. Yes, for some reason that lamp got closer to me when I looked thru my 50mm 1.8g lens on my Nikon D3300 Crop-Sensor Camera??....WHY? For some reason I seemed to somehow get closer to the Lamp, but I never moved any closer, but I had to move Back?..WHY?

I hope this explanation seems more logical to this whole "Crop-Factor" & "Crop-Sensor" Mathematical Measurement of the F.O.V. or as some refer to as D.O.F.
All I know, is if I have 5 patio stones in a row, 1-thru-5, and I am on #5 looking at a Cow, when I look thru the 50mm 1.8g lens on my "Crop-Sensor Camera" I must NOW STEP BACK a Stone or two to have the "whole Cow" correctly in my Vision,.....WHY?... Is this a Change in MY "Field of View" or MY "Depth of Field"??

I certainly hope I am making Sense to SomeOne out there.!!

My understanding of the "Crop-Factor" with a Nikon APS-C model Camera is that your actual view thru the Lens, so if you are using a 50mm lens on a APS-C Camera, you must multiply 50mm x 1.5 = 75mm new Field of View thru the Lens. Also this affects the defined D.O.F.= Depth of Field too.
This is created by the Crop-Sensor ASP-C Nikon Camera having a smaller Sensor size, than a FULL-FRAME CAMERA, changing the actual Field of View of the 50mm lens, but physically it is still only a 50mm lens, the smaller sensor multiplies the percepted or Precieved F.O.V. from 50mm to 75mm.
Now, if my understood description of this mathmatical formula is incorrect, PLEASE Correct my understanding, but this is the way I understand the "CROP-FACTOR on a CROP-SENSOR DSLR Camera.
On a Crop-Sensor Canon Camera the Crop Factor is 1.6 x 50mm.

Saying that, Any insight on what Computer ingredients I must have on my Apple Macbook Pro 13" Laptop to be able to run the Luminx AI Program properly without issues arising???