> That is what I'm wondering about. I thought I remembered reading > (although I can't remember where) that the pitch is the same > on all the > current Canon cmos chips, it is just the size of sensor that generates > the image size. The notion is supported by the ratio of > 6-8-11 which is > roughly inversely proportional to 1.6-1.3-1 . > > Someone must know of an authoritative source on this. >
I don't know but I can easily work it out (I'm using approximate values for the image dimensions but they are close enough for this exercise) Horiz dimension for the 1.6 crop sensor is 3000 pixels (3000x2000 = 6MP) 36mm/1.6=22.5mm 3000/22.5mm=133 pixels/mm Horiz dimension for the 1.3 crop sensor is 3400 pixels (3400x2400 = 8MP) 36mm/1.3=27.7mm 3400/27.7mm=122 pixels/mm Horiz dimension for the 1.0 crop sensor is 4000 pixels (4000x3100 = 11MP) 36.0mm/1.0=36.0mm 4000/36.0=111 pixels/mm -- Visit our website at www.roke.co.uk Roke Manor Research Ltd, Roke Manor, Romsey, Hampshire SO51 0ZN, UK. The information contained in this e-mail and any attachments is confidential to Roke Manor Research Ltd and must not be passed to any third party without permission. This communication is for information only and shall not create or change any contractual relationship. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
