stupid question of a stupid guy(me)("Stupid Wide" angle zoom)

[mantra]

well
i have a question
i think that i 'm fool , but still can't understand

well
i have a 350 & 30D they are cropped 1.6
well the 5d is a full format

well i keep in consideration these 2 lens
CANON EF - S 10 - 22MM F / 3.5 - 4.5 USM
Canon EF 16-35mm f/2.8L USM

a seller told me they have the same wide range,because he told me 10*.16 =16 and 22*16=35

well what i can not understand is :
well a CANON EF - S 10 - 22MM on a 30D is a 16-35 right?
a Canon EF 16-35mm on a 30D is a 25-56 right?

well they have different wide range so they are different on a cropped format?

please could someone easy teach me


best regards

[LightRules]

Originally Posted by mantra

well what i can not understand is :
well a CANON EF - S 10 - 22MM on a 30D is a 16-35 right?
a Canon EF 16-35mm on a 30D is a 25-56 right?

well they have different wide range so they are different on a cropped format?

10-22mm is a 10-22mm lens, regardless of sensor format.
16-35mm is a 16-35mm lens, regardless of sensor format.

However, your field of view (or angle of view) depends on sensor format.

So...

10-22mm on 1.6x sensor gives a FOV of 16-35mm.
16-35mm on 1.6x sensor gives a FOV of 25-56mm.

[gasrocks]

Yes, 10-22 on a 1.6x crop body come out to 16-35. And, 16-35 comes out to 25-56. What is a 50D? Haven't heard of that one.

[Hermeto]

Yes, you are basically correct.

10-22mm on 1.6x crop camera has the same angle of view as 16-35mm on a Full Frame camera.
The difference is only in maximum aperture.

Just the same, 16-35mm on FF, will have the same angle of view as 26-56mm on 1.6x crop camera.

[LightRules]

Originally Posted by gasrocks

Yes, 10-22 on a 1.6x crop body come out to 16-35. And, 16-35 comes out to 25-56. What is a 50D? Haven't heard of that one.

I don't see any mention of a 50D anywhere.

EDIT: I see it now, in his sig.

[grimey121uk]

if you have a 1D 1.3x
if you have a1Ds or 5D 1.0x
if you have a 40D 400D 30D 40Detc 1.6x

so if u have a canon 40d with a 100mm lens
you get the same magnification as 160mm (100x1.6)

[mantra]

Yes, 10-22 on a 1.6x crop body come out to 16-35. And, 16-35 comes out to 25-56. What is a 50D? Haven't heard of that one.

by the way the 50D is a film camera ,don't know the name in the usa market


so the seller told me rubbish, foolishness
if i want such range i have to buy CANON EF - S 10 - 22MM

the seller told me that CANON EF - S 10 - 22MM & Canon EF 16-35mm on a cropped have the same wide range

[_aravena]

the 16 on a crop doesn't, the 16 on a FF does. It's only complicated if you make it. Relax and don't think on it too much. That's seriously what gets people, they over think it.

[mantra]

Originally Posted by _aravena

the 16 on a crop doesn't, the 16 on a FF does. It's only complicated if you make it. Relax and don't think on it too much. That's seriously what gets people, they over think it.

so this canon reseller is a jerk ,i will never buy nothing by him

[ATI058]

Hi everyone,
If I'm not mistaken, the EF-S 10-22 f/3.5-4.5 lens is a digital only design that is specifically for APS-C sensors.

I read somewhere that EF-S lens cannot be used on FF 35mm cameras because the lens fits closer to the sensor. Hence, the 1.6x crop factor is moot. I think this lens is actually a true 10-22mm super wide for the APS-C sensor cameras.

[CyberDyneSystems]

Originally Posted by ATI058

Hi everyone,
If I'm not mistaken, the EF-S 10-22 f/3.5-4.5 lens is a digital only design that is specifically for APS-C sensors.

I read somewhere that EF-S lens cannot be used on FF 35mm cameras because the lens fits closer to the sensor.

This part is true ATI

Hence, the 1.6x crop factor is moot. I think this lens is actually a true 10-22mm super wide for the APS-C sensor cameras.

This part is not. Somewhere down the line many people have made this mistaken assumption, and it continues to be spread. But as the lens states clearly, and as pointed out earlier in the the thread all EF or EF-s lenses use only the actual focal length in mm of the optic. They do not anywhere offer in the specs the FOV effect from a crop sensor.

[ATI058]

Thank you Law Dog,

This is good information that I did not understand . . . so the question I still have (please speak slowly for me); is this a super-wide lens for the 1.6x's or not?

[LightRules]

Originally Posted by ATI058

so the question I still have (please speak slowly for me); is this a super-wide lens for the 1.6x's or not?

T-h-e 10-22 l-e-n-s w-o-u-l-d b-e c-o-n-s-i-d-e-r-e-d a s-u-p-e-r w-i-d-e a-n-g-l-e l-e-n-s , y-e-s!

[SkipD]

Originally Posted by ATI058

Thank you Law Dog,

This is good information that I did not understand . . . so the question I still have (please speak slowly for me); is this a super-wide lens for the 1.6x's or not?

The EF-S 10-22, mounted on an APS-C camera (such as a 40D, etc.) provides the same field of view as the EF 16-35 would when mounted to a 35mm film (or "full-frame" DSLR) camera body.

The 10-22 on an APS-C camera and the 16-35 on a 35mm film camera are both considered ultra-wide lenses when used on those respective formats.

Unfortunately, Canon (and probably other lens manufacturers as well) does label the 16-35 as ultra-wide in their advertising, but without defining the camera format for which it is truly an ultra-wide lens. I use a Canon EF 16-35 f/2.8L on my 20D, and it certainly is not an ultra-wide on that body.

[ATI058]

Originally Posted by LightRules

T-h-e 10-22 l-e-n-s w-o-u-l-d b-e c-o-n-s-i-d-e-r-e-d a s-u-p-e-r w-i-d-e a-n-g-l-e l-e-n-s , y-e-s!

Oh . . . now I get it