Is added adapter similar to extension tube?

Started 3 months ago | Questions thread
grsnovi
OP grsnovi Senior Member • Posts: 1,228
Re: Is added adapter similar to extension tube?

Paraphrasing Wikipedia , I understand that extension tubes:

Contain no optical elements...

and they move the lens farther away from the focal plane results in:
- closer focus,
- greater magnification,
- and greater loss of light.

Lens adapters may unintentionally have an effect similar to an extension tube.

(I had extension tubes for my FTb in 1970).

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