Achromat equals close up filter?

[miloca]

Hi,

I was wondering if an achromat is like a more powerful (closeness wise) filter than a regular close up filter? For example a Cokin Close Up filter.

Is there any way to DIY an achromat in a optics store?

Cheers,

CCC

[jleo]

Some people have made achromats with used binocular lenses.....

http://www.microfilmmaker.com/tipstrick/Issue27/35mmArt2.html

http://www.instructables.com/id/DIY-Macro-Lens-made-from-Binoculars_1/

[miloca]

Thanks man,

But is it a close up filter (let's say +10) is the same as an achromat? I might be easier for me to get a close up filter instead of an achromat. I am located in Colombia, and there is no much option down here, and shipping is not that cheap.

Thanks in advance.

C

[j]

An achromat is a closeup filter, but a special kind of lens.

It's is made up of two or more pieces of glass glued together that help correct for distortion inherent in single lens design. Specifically chromatic aberration.

A great source of high quality cheap achromatic lenses (large enough to use) are in binoculars. 50mm lenses are common and cheap. Better are 60mm and 70mm lenses.

[twocik23]

Or you can try www.surplusshed.com for great optics at an affordable cost.