Canon EFS?? Does Crop Exist???

[Stevedevil]

If 1.6 is the crop value, why have Canon introduced the S range

 

[Alex_B]

The crop factor is the positioning of the sensor in relation to the focal length of the lense isnt it??

no, the SIZE of the sensor ... not position....

 

[Stevedevil]

They dont fit any other camera apart from digi

 

[Stevedevil]

The Physical size or meg pixel

 

[Big Mike]

Forget about the crop factor.

Put a lens on your camera...look into the view finder...that is what you get. That's all you need to know.

If that view is not wide enough...then you need a shorter focal length.

 

[Alex_B]

If 1.6 is the crop value, why have Canon introduced the S range

since for a smaller sensor you need to shine light on a smaller area ... this can be achieved with smaller and lighter and cheaper lenses ...

 

[Alex_B]

The Physical size or meg pixel

just physical size!

 

[Stevedevil]

Isnt it true that the EFS range fits further into the camera body as to adjust the focal length of the LENS, as the camera will only see the image as a rectangle, not a circle, so all lenses / cameras crop will be defined as focal length, so if this lense will only fit digital then the crop does not count ???

 

[Big Mike]

Isnt it true that the EFS range fits further into the camera body as to adjust the focal length of the LENS

No. It fits further into the camera because it's making a smaller image circle. That has nothing to do with focal length.

 

[shingfan]

this link will explain it....is the sensor size....and is a crop factor relative to 35mm film......not a real "CROP" from the image

http://www.millhouse.nl/digitalcropfactorframe.html

 

[Stevedevil]

I read about quality in your forum, and yes a wider f stop ( lower number ) is important, my question still stands, does an EFS 18mm come close to a 10mm EF, with obvious implications or usage ( bluring from behind ) where a higher ISO met with good lighting can achieve same results

 

[Alex_B]

Isnt it true that the EFS range fits further into the camera body as to adjust the focal length of the LENS, as the camera will only see the image as a rectangle, not a circle, so all lenses / cameras crop will be defined as focal length, so if this lense will only fit digital then the crop does not count ???

no, there is no such thing as "adjusting for focal length".

crop - defined by the sensor size

EF-s - smaller image circle -> only works for small sensor

start from scratch ... (btw, the rectangle has to fit in a circle ... the circle the lens projects the image on)

 

[Stevedevil]

If you adjust the focal point of a lense by taking the focal point into the camera ( EFS ) then the image will be less cropped ??? True

 

[Stevedevil]

Im sorry but focal length when I

 

[Alex_B]

i just lost my words ...