Digital Single-Lens Reflex (DSLR) Tele Values

Greetings,

I’m a Canon EOS D-60 (circa 2003) DSLR user here and own the admittedly non-pro Canon EF 100-300mm lens … which … counting in the 1.6x image conversion factor … means I really have 160-480mm tele compatibility. Yes?

Is this 1.6x factor common to all DSLRs? If yes … and since digital is the wave of the present … shouldn’t reported tele values be amended to read … 200(320*)mm … 300(480*)mm … 400(640*)mm … with the * indicating the adjusted digital tele value. Or just the adjusted tele value?

Or is all this already assumed by all? Thanks.

Mike (shamrock838)

Well, no, its not a standard thing.

DSLR cameras can have different focal length multipliers. Yours is 1.6 (as are most), but some have a 1.3 focal length multiplier (1D), and if I remember correctly, some have none at all.

Plus, you can still use the lenses on film 35mm bodies, which do not have a multiplier.

No your incorrect in thinking that should be a standard. As Matt pointed out not all DSLRs have the same crop factor and most lenses can be put on 35mm bodies, in fact most high end DSLRs are full frame with no crop factor. Think of a 400mm as a 400mm and so on.

Most Nikon and Canon consumer and prosumer DSLRs (even many professional level) have the 1.6 crop factor. I think the 5D was one of the first to go back to the original film-style ratio.