How do I know if my crop sensor is a factor?

[Big Mike]

an EF-S lens in a Canon mount is as useless as teats on a boar on a 1.3x or a full-frame Canon body...a Nikon mount lens that is DX is usable on both crop- and full-frame sensors...

It's actually not that hard to use something like the EF-S 10-22mm on a full frame of APS-H camera. It's not inherent either...but it's possible.

 

[McNugget801]

As always youre over thinking this one.

I think what you should really be worried about is the °'s within the field of view and not mm's.

FYI - My Tokina 11-16 f2.8 rarely leaves my camera body. Its a landscape machine.

 

[Bitter Jeweler]

The 18mm's FOV on a crop body is less that the FOV of the same lens on a Full Frame camera.

If she is trying to obtain the FOV of an 18mm lens on a full frame camera, on her crop body, then yes, she needs a shorter focal length.

I think she understands this, and you folks are messin her up.

Throw out the mount types of EF-S and EF. They don't enter into the equation for the FOV. They only tell you that one cannot be used on a full frame camera, and the other can be used on both.

What I think may have confused you e.rosie96, is an idea that EF-S lens already take into account the crop factor when describing the focal length. At least, that's what I garnered from this thread.

 

[e.rose]

The 18mm's FOV on a crop body is less that the FOV of the same lens on a Full Frame camera.

If she is trying to obtain the FOV of an 18mm lens on a full frame camera, on her crop body, then yes, she needs a shorter focal length.

I think she understands this, and you folks are messin her up.

Throw out the mount types of EF-S and EF. They don't enter into the equation for the FOV. They only tell you that one cannot be used on a full frame camera, and the other can be used on both.

What I think may have confused you e.rosie96, is an idea that EF-S lens already take into account the crop factor when describing the focal length. At least, that's what I garnered from this thread.

YES. haha, I think I get it now.

Subsuck messaged me and explained that even for an 18mm EF-S lens I still have to take the crop factor into account.

I was under the impression that it was "true", when it's not.

And after knowing THAT... *now*... it makes sense.

Oh my god... it's like the release of a mental orgasm, finally understanding.

I'm f***ing exhausted. I'm going to go get food now.

EDIT: Thanks for your help everyone!!!! I know dealing with my questions and over-thinking gets annoying, but I appreciate those of you that take the time to help me (publicly in the forum OR via PM )

 

[Bitter Jeweler]

Cool!

I speak crazy.
I can translate.

 

[e.rose]

Cool!

I speak crazy.
I can translate.

:hug::

 

[Big Mike]

Oh my god... it's like the release of a mental orgasm

Quote of the week.

 

[djacobox372]

Sigma = DC
Tamron =Di-II (Di is FX, Di-II is crop)

Of course another giveaway is focal lengths of 11mm or smaller--you're not going to find those in FX unless they're fisheye lenses.

 

[e.rose]

Oh my god... it's like the release of a mental orgasm

Quote of the week.

Haha, yesssssss!

 

[Yucel]

I have the Tokina 11-16, Love it, and shoot it on a Nikon D90. See example photo here: What draws attention in a glamour photograph? | Cultured Woman, LLC

This though will give you a bit narrower view on the Canon.

The real issue is not Focal Length.

You are asking the right question in the wrong way.

The real question is what angle of view will you be getting.

The crop factor on a Nikon crop sensor is like 1.5, or so, and on the canon is like 1.6 or so.

That is, you take the focal length on the crop sensor, which say is 50mm, multiply by 1.6 and you get 80... this does not make the lens 80mm.

The 50mm lens on a canon crop sensor camera, will give the same angle of view as a 80 mm lens on a 35mm (aka "full frame) sensor.

There are other effects as well, on Depth of field, size of image circles on the film planes etc.

A lens that works to fill the frame on a 35mm camera has a great deal of wasted weight and glass on a crop sensor. It's money largely wasted.

Forget the focal lenght. The only reason that 50mm is normal, is the diagonal on the 35mm film,from which this all stems, is 50mm, and that gives an about normal perspective view (normal being what human eye sees as generally normal).

100mm, on the 50mm diagonal, or 35mm film, gives a 2x magnified effect.

25mm, on same film, gives twice the angle, and so on.

Its about angle of view.

 

[Village Idiot]

There's like 6 or 7 EF-S lenses in the entire Canon lens line up anyways. They're generally cheaper. At least we don't have to deal with only being able to use a percentage of our camera's full megapixel range with 90% of the lenses Canon makes.

 

[e.rose]

At least we don't have to deal with only being able to use a percentage of our camera's full megapixel range with 90% of the lenses Canon makes.

I'm afraid to ask this but...

what?

 

[Village Idiot]

At least we don't have to deal with only being able to use a percentage of our camera's full megapixel range with 90% of the lenses Canon makes.

I'm afraid to ask this but...

what?

DX lenses one a FF camera only will work, but they only use a certain percentage of the sensor because of the image circle. I believe that's how it goes. I think a D700 with a DX lens shoots 5mp images.