N90 camera information

[circini]

Hello,

I have tried to find some information about the camera in the nokia n90 mobile phone, but I cannot find it All I need is the size of the chip in the camera in millimeters and the field of view. Can you help me?

[peterblazejewicz]

hi,

Imaging and Video

* Two-way video call capability
* Video sharing for one-way live video or video clip sharing within the voice call
* 2 megapixel camera (1600 x 1200 pixels) with autofocus 20x digital zoom
* Integrated flash (operating range up to 1.5m)
* Flash modes: on, off, automatic and anti red-eye
* Video capturing in MP4 format (MPEG-4 video, AAC-LC audio) CIF resolution (352x288 pixels)
* Advanced camera modes: still, sequence, video
* Settings for brightness adjustment, image quality, self-timer, white balance settings and colour tones
* Six possible capture scene settings including Scenery, Portrait, Night and Sports
* Video and still image editors
* Movie Director for automated video production
* Image and video clip uploading to the web
* Rotating gallery

http://www.nseries.com/nseries/v2/me...try=PL#imaging

Carl Zeiss f/2.9 35mm (equivalent) autofocus lens and 2.1 megapixel (1600×1200) sensor

Based on the EXIF data of all the images, it appears that the N90’s camera has a fixed aperture of f/2.9, sensitivity from at least ISO 250 to 1000, and shutter speeds from at least 1/8 to 1/2500. According to the manufacturer’s specs, it focuses down to 10cm.

http://www.the-gadgeteer.com/review/nokia_n90
regards,
Peter

[kburgess]

One way:
The actual focal length is 5.5 mm the specs say this is "equavalent" to 35 mm on a 35 mm camera, so the sensor size is 0.157143 times the size of a 35 mm frame. Of course the aspect ratio might be a little different.

Another way:
Knowing the lens is 5.5 mm, you could measure the Field Of View and work backwards to get the sensor size.

Ken

[circini]

Thank you for your fast replies, but I still don't get it
So, it is possible to calculate the size of the chip? how exactly? Are there any great tutorials about the relations between field of view, focal length, aperatures and the image sensor size? I have tried for the whole day to understand how it is done but I don't quite understand. Especially, what does it relly mean to have a focal length of 5.5mm (35mm equivalent 35mm)?
Thank you for your time. I really appreciate your help.

[kburgess]

The 35mm frame is 24 × 36 mm multiply that by 0.157143 and you get the sensor size of the N90, which must be close to: 3.77 mm X 5.65 mm unless the aspect ratio of the images produced by the N90 is very much different from the 35 mm frame.

The field of view can be calculated (or looked up for a 35 mm lens) by using information you can find at:

http://en.wikipedia.org/wiki/Angle_of_view

Ken