Roy : My understanding is similar to Hershel's. A digital lens is a lens that is : designed for the "half frame" DSLR APS-C camera. Since it only needs to : cover a smaller sensor it can be made smaller and cheaper thus providing a : lighter camera to carry. well like I said, i've seen explanations here on PF saying that digital lenses produced collimated image forming light.. and I still find it hard to swallow. The explanation of telecentric lenses goes some way to explaining how this might work, but the claim by non specialty camera manufacturers that their lenses are telecentric is something I doubt (they often seem to avoid using the word and instead describe how their 'digital' lenses creat a non-converging parallel ray induced image) much as Olympus does here http://www.olympus-europa.com/consumer/dslr_7045.htm though they use the term 'near-telecentric' haha right As to a lens being called digital because it's designed for a smaller frame, that's just weird (probably marketing hype, but weird nonetheless). The little Pentax 110 of yesteryear - a fine camera by the way - managed by labelling it's lenses in mm, same as everyone else did for so so long.. and I really don't think too many people got confused and assumed that the 24mm was a wide angle ;) it's almost as weird as the concept of a '4/3 lens system' - another odd term i've seen floating about lately Has no one else has encountered the claim that digital lenses output parallel rays of light to the sensor? k
