What Is A 35 Millimeter Camera?

Jimmer411 wrote in post #4174124
I dont completely understand the crop factor. Some people refer to it like its has a teleconverter effect (extra zoom) where others say that it is no zoom, but the image is cropped.

Im leaning more towards the 2nd opinion...

It's the second option. The crop sensor is literally seeing a smaller portion of the image circle generated by the lens than a full-frame sensor or piece of 35mm film. The image circle remains the same on both cameras. The distance between the back of the lens and the sensor/film is still the same. The only thing that's different is the size of the chunk of the image circle that's being recorded.

You know how a projector will show an image on a wall or screen? The back of the lens is doing that exact same thing -- projecting an image onto the sensor -- with the light gathered by the front of the lens. The size of the image being projected by the lens is actually bigger than the sensor. With a standard EF lens on a full-frame (or 35mm film) camera, the edges of the circle can come fairly close to the corners of the sensor. With the same lens on a crop camera, there's quite a bit of distance between the corner of the sensor and the edge of the image circle. This is why vignetting on many lenses is so much more pronounced on the 5D than on the 30D.


Hope this made sense...

Jimmer411 wrote in post #4174124
50mm is the "Field of View" that best replicates what we see with the human eye. Put a 50mm lens on your camera and look thru the viewfinder, and then look at the same object normally. Almost exact.


I dont completely understand the crop factor. Some people refer to it like its has a teleconverter effect (extra zoom) where others say that it is no zoom, but the image is cropped.

Im leaning more towards the 2nd opinion...

You're leaning the wrong way.

And your 50mm explanation is wrong on two counts.

50mm is the focal length that, with a full-frame 35mm camera (or equivalent digital camera) has a field of view most resembling (sort of) that of the human eye. But that is not why it's considered a "normal" lens.

Viewfinders vary widely, and should be left out of it.

I like to think of a 50mm FoV as being somewhat like looking through a window. You see much more with your eyes than you would with a 50mm, the 50 gives you a natural outlook. Interestingly, it's also at a balancing point in focal lengths where it is easiest to manufacture a lens of high image quality and high light transmission properties. I don't really know why, but it is.

whats a camera?

20droger wrote in post #4174479
You're leaning the wrong way.

And your 50mm explanation is wrong on two counts.

50mm is the focal length that, with a full-frame 35mm camera (or equivalent digital camera) has a field of view most resembling (sort of) that of the human eye. But that is not why it's considered a "normal" lens.

Viewfinders vary widely, and should be left out of it.

Actually, no he isn't. The only reason you think there's a teleconverter effect is because you need to enlarge the photos from an APS-C camera more than those from a FF camera to get the same print size. You can get the same thing from FF (neglecting pixel densities, which vary even within a sensor format) by enlarging it the same amount you need to enlarge a crop image.

And a "normal" lens has historically been, across all camera film sizes, the diagonal of the image size. 35 mm has been the exception in using 50 mm rather than 43 mm, which is the diagonal measure of a 24x36 mm frame. And you'll have to ask Oskar Barnack why 35 mm uses a 50.

Remember when DVD's were the thing to watch movies on?
lol

( My tv still has a Picture tube...)

YGBSM

The library has tons of books explaining photography...I'd recommend OP doing some learning to be able to ask more precise questions that can be answered simply and more directly...

Sparky98 wrote in post #4173601
Back to the film sizes, no one mentioned everyone's favorite the 110(I think that was it). It had a negative not much bigger than the sensors in today's PnS cameras.

Who remembers the Kodak disc film?

Show the op some respect wiseguys and use your knowledge to answer his question - isn't that what this forum is for?

California4Life wrote in post #4174790
whats a camera?

The term as well as the modern-day camera evolved from the camera obscura, Latin for "dark chamber", an early mechanism for projecting images, in which an entire room functioned as a real-time imaging system.

(Lifted from Wikipedia.)

You're welcome.

-js

buzzyrabbit wrote in post #4177430
Who remembers the Kodak disc film?

I think even Kodak wants to forget about disc film.

And 110 film as well!

[QUOTE=breal101;417748​1]I think even Kodak wants to forget about disc film.[/quote
Didn't they buy back the camera's?

[QUOTE=buzzyrabbit;417​7563]

breal101 wrote in post #4177481
I think even Kodak wants to forget about disc film.[/quote
Didn't they buy back the camera's?

They had to buy back the polaroid knockoffs, I don't know about the disc cameras. It sure cost the film labs a bunch of money to buy special processors and adapt their printers to that format.