Is added adapter similar to extension tube?

Started 3 months ago | Questions thread
Dem Bell Contributing Member • Posts: 559
Re: Is added adapter similar to extension tube?
1

grsnovi wrote:

Wondering to what degree adding an adapter is similar to adding an extension tube between the lens and the sensor. Isn't doing so going to change the apparent focal length of the adapted lens?

Neither changes focal length.

Both are designed to hold the lens at a specific distance from the sensor.

The difference is that the adapter is supposed to "zero" the position of the lens, whereas the extension tube moves the lens mount further away from the sensor by a specified distance (10 mm, 16 mm etc...).

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