Luminous Landscape Forum

Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: Mike Sellers on July 24, 2015, 09:03:46 am

Title: APS-c?
Post by: Mike Sellers on July 24, 2015, 09:03:46 am

Which format will produce a 4000x3000 file straight from the camera?
Mike

Title: Re: APS-c?
Post by: E.J. Peiker on July 24, 2015, 09:16:48 am

The only sensors that are 4:3 aspect ratio are micro 4/3 (and 645 but that's a different league than what we are talking about) and the only sensor that would do that without any resizing would be a 12 megapixel micro 4/3 camera since 4000x3000 is 12 megapixels.  Of the current cameras on the market, the only one that does close to that is the Panasonic LX100 which gives you a 12.8 megapixel image which is very close to 4000x3000.  Any other camera you would either have to resize or crop significantly.

APS-C by definition is not 4:3 aspect ratio it is 3:2.

Title: Re: APS-c?
Post by: Mike Sellers on July 24, 2015, 09:30:38 am

thanks!

Title: Re: APS-c?
Post by: Slobodan Blagojevic on July 24, 2015, 10:27:13 am

Canon G15 has a 4:3 mode with exactly 4000 x 3000 px, for instance.

Title: Re: APS-c?
Post by: jerryrock on July 24, 2015, 09:54:48 pm

The Canon EOS-M3 has a 24 Megapixel APS-C sensor that produces files that are 6000 x 4000.

Title: Re: APS-c?
Post by: Mike Sellers on July 29, 2015, 11:10:27 am

Here is what I don`t get. If the 4/3 format sensor produces 12mp then why is my Sony a200 3/2 sensor  rated at 10mp instead of 2000x3000= 6mp?

Title: Re: APS-c?
Post by: Telecaster on July 29, 2015, 04:49:13 pm

Uhhh…it's simple math. The a200's sensor has an array of 3872x2592 photosites used for creating JPEG images. (The RAWs likely contain a slightly larger count, which 3rd-party software may include in converted images.) 3872x2592=10036224. 10mp, or close enough to not matter for marketing purposes.

Sensor designers are under no constraints to stick with nice round numbers like 3000x2000 or 4000x3000.

-Dave-

Title: Re: APS-c?
Post by: BradSmith on July 29, 2015, 11:53:53 pm

Mike,
Put another way, the aspect ratio (W/H) of the sensor has NOTHING TO DO with the number of pixels in each direction.   A 4/3 sensor could be composed of ANY number of pixels as long as the ratio of the number in the width divided by the number in the height is 4/3.   The following are not actual pixel counts, but are theoretical sizes, all of which would be 4/3:
Could be 4000 x 3000 = 12Mp.   
Could be 1200 x 900 =     1.1MP
Could be 6000 x 4500 = 27Mp
Brad

Title: Re: APS-c?
Post by: BradSmith on July 29, 2015, 11:57:31 pm

Quote from: jerryrock on July 24, 2015, 09:54:48 pm

The Canon EOS-M3 has a 24 Megapixel APS-C sensor that produces files that are 6000 x 4000.

Jerry,
I don't understand the point you are trying to make.   The sensor you mention, an APS-c has a 3/2 aspect ratio.  It isn't a 4/3.
Brad