Diopter

[Storker]

stick with 'macro lens'

If we're picking nits here, the correct term for what's colloquially known among hobby photogs as a "diopter" is "close-up lens" or "close-up filter". However, since the power of the lens is expressed in diopters, the unit of measure has taken over as a term for the lens. "I used a +5 diopter" versus "I used a +5 diopter close-up lens".

A macro lens is not the same as a close-up lens. While a close-up lens screws into the filter threads of a standard lens and provides closer focus, a macro lens is a photographic lens able to focus to 1:1 magnification. Lower magnification lenses - correctly called "close-focus lenses" - have also been called "macro" lenses. A true macro lens will also be optimized for best image quality at the near end of its focus range, while standard photographic lenses traditionally have been optimized for best quality at some distance.

 

[Ardy]

Hi Victor what do you mean by this statement? "I wish it was easier to install the Olympus port, it is really tight." I have just bought a 60mm macro to go into my Olympus housing.

 

[deeper thoughts]

Hi Victor what do you mean by this statement? "I wish it was easier to install the Olympus port, it is really tight." I have just bought a 60mm macro to go into my Olympus housing.

the ports are a pain to remove, a car oil filter strap makes it much easier

 

[decimal86]

for the Oly casings, u need a strap to loosen the port. i changed to a Nauticam. problem solved