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Adaptall 018F 1:1 extension tube for 52B/52BB 90mm macro Review RSS Feed

Adaptall 018F 1:1 extension tube for 52B/52BB 90mm macro

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0 1,394 Thu February 2, 2017
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Adaptall 018F 1:1 extension tube for 52B/52BB 90mm macro
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Description:
This is a 45mm extension tube, no optics, adaptall fitting, to accompany specifically the 90mm macros 52B/BB to achieve 1:1 reproduction.
See the 01F 2x TC listing for info on using a deglassed 01F to achieve the same thing.

A rule of thumb is that at 1:1 the effective f-stop becomes about 2 stops greater than the value set using your camera. An aperture of f/2.8 therefore becomes more like f/5.6, and f/8 more like f/16, etc. However, this rarely requires additional action by the photographer, since the camera's metering system automatically compensates for the drop in light when it calculates the exposure settings. - Cambridge in Colour.
Mount Type: Third-party (adapter required)


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