joe daniels
Member
Anyone know what the lens factor will be for the new Alpha?
-
Welcome to the new forums! Please read this first. For known issues we are working to resolve, click here.
Alpha lens factor
- Thread starter joe daniels
- Start date
Ari Aikomus
Veteran Member
1.5x says "letsgodigital":
http://www . letsgodigital .org/en/camera/specification/1283/show.html
Make sure to remove the 2 space before & after "letsgodigital"
--
http://www . letsgodigital .org/en/camera/specification/1283/show.html
Make sure to remove the 2 space before & after "letsgodigital"
--
- Ari Aikomus -
joe daniels
Member
Thanks for the reply - I read that info but missed it the first time 'round.
Joe
Joe
PhotoTraveler
Forum Pro
"lensfactor" ? WTF is that.
Are you talking about the 1.5 crop? That has nothing to do with the lens.
--
---
Will Sony and Nikon hurry up all ready and announce some stuff so Minolta users can
figure out if they Stay, Go or Curse the camera industry.
Are you talking about the 1.5 crop? That has nothing to do with the lens.
--
---
Will Sony and Nikon hurry up all ready and announce some stuff so Minolta users can
figure out if they Stay, Go or Curse the camera industry.
DPierce
Leading Member
It may be a synonym...our language contains many of them.
It may also be a mis-statement...easily decipherable and very forgiveable by most.
--
Dave Pierce
http://www.pbase.com/pierce324
The early bird may get the worm...
but the second mouse gets the cheese!
Anastigmat
Forum Pro
That is almost certainly correct. It would be a surprise (even a shock) if Sony does not use the 1.5x crop 10mp sensor currently used by the Nikon D200.
1.5x says "letsgodigital":
http://www . letsgodigital .org/en/camera/specification/1283/show.html
Make sure to remove the 2 space before & after "letsgodigital"
--
- Ari Aikomus -
PhotoTraveler
Forum Pro
Maybe, I guess part of me goes into "slap forehead" mode when I hear something like that cause it sounds like a person thinking their 200mm lens becomes a 300mm lens on a 1.5x body.
--
---
Will Sony and Nikon hurry up all ready and announce some stuff so Minolta users can
figure out if they Stay, Go or Curse the camera industry.
--
---
Will Sony and Nikon hurry up all ready and announce some stuff so Minolta users can
figure out if they Stay, Go or Curse the camera industry.
joe daniels
Member
Doesn't it?
PhotoTraveler
Forum Pro
I think you meant that as a response to me post.
The answer is no. the 1.5x makes a 200 a 300 is pure marketing BS. A 200mm lens is a 200mm lens no matter what you mount it too.
the 1.5x is a crop factor. And what is changing is your Field of View. When you use a APS camera, the sensor is smaller then film. So the image circle produced by the lens covers the same area as it did on film, but the sensor is smaller, so the sensor doesn't pick up all the image. It's only cropping out the middle of the image circle.
Since you only see the middle of the image, it has a FoV less then that same lens showed on film.
You get the exact same effect scanning a film negative and cropping it in Photoshop. You only loose image with crop camera, there is no extra zoom added to the lens. But marketing from companies sold it like it did. Since if they told you they were cropping out the image, you wouldn't like it as much.
1.5x 1.6x 1.3x 2.0x are all about FoV and how much they crop it. On the flip side, you get to say medium format cameras, things flip. On a 6x7 Medium format camera, a 200mm lens has an equivalent FoV to 35mm as a 100 mm lens. So the crop factor is 0.5x
--
---
Will Sony and Nikon hurry up all ready and announce some stuff so Minolta users can
figure out if they Stay, Go or Curse the camera industry.
The answer is no. the 1.5x makes a 200 a 300 is pure marketing BS. A 200mm lens is a 200mm lens no matter what you mount it too.
the 1.5x is a crop factor. And what is changing is your Field of View. When you use a APS camera, the sensor is smaller then film. So the image circle produced by the lens covers the same area as it did on film, but the sensor is smaller, so the sensor doesn't pick up all the image. It's only cropping out the middle of the image circle.
Since you only see the middle of the image, it has a FoV less then that same lens showed on film.
You get the exact same effect scanning a film negative and cropping it in Photoshop. You only loose image with crop camera, there is no extra zoom added to the lens. But marketing from companies sold it like it did. Since if they told you they were cropping out the image, you wouldn't like it as much.
1.5x 1.6x 1.3x 2.0x are all about FoV and how much they crop it. On the flip side, you get to say medium format cameras, things flip. On a 6x7 Medium format camera, a 200mm lens has an equivalent FoV to 35mm as a 100 mm lens. So the crop factor is 0.5x
--
---
Will Sony and Nikon hurry up all ready and announce some stuff so Minolta users can
figure out if they Stay, Go or Curse the camera industry.
joe daniels
Member
Hi There,
Thanks for the info on lens factor. I learned something new!
Regards,
Joe
Thanks for the info on lens factor. I learned something new!
Regards,
Joe
... a 200mm ( in a 35 mm film size SLR ) becomes a 300mm ( in an APS sensor size DSLR) !
Therefore, in practical terms it is right to say that with the 1.5x crop factor of an APS sized sensor camera, does makes your "normal" 200mm lens act as a 300mm!
... Lucas
--
Always having fun with photography ...
Therefore, in practical terms it is right to say that with the 1.5x crop factor of an APS sized sensor camera, does makes your "normal" 200mm lens act as a 300mm!
... Lucas
--
Always having fun with photography ...
Keyboard shortcuts
- f
- Forum