There is disclosed a distance measuring equipment capable of performing efficiently a greater accuracy of focusing without troubling an operator, and a camera incorporating thereinto such a distance measuring equipment. By the use of the first focusing algorithm switches 61, 62 and 63 set up to the turn-off state, the turn-off state and the contact 62a side, respectively, so that AF-dedicated photo detector circuit 40 performs once a ratio arithmetic processing in accordance with photo-currents I1 and I2 from the PSD 30. In case of the short distance area, they are dealt with as the focusing data. In case of the middle distance area, the ratio arithmetic processing is performed by n times. In case of the long distance area, by the use of the second focusing algorithm switches 61, 62 and 63 set up to the turn-off state, the turn-on state and the contact 62b side, respectively, so that the ratio arithmetic processing is performed in accordance with the photo-current I1 and the constant current Ir from the constant current source 50. In case of the longest distance area, by the use of the third focusing algorithm switches 61, 62 and 63 set up to the turn-on state, the turn-off state and the contact 62b side, respectively, so that the light quantity arithmetic processing is performed in accordance with the additional values of the photo-currents I1 and I2 and the constant current Ir to determine focusing data.