Tamron BBAR f2.5 28mm Adaptall 2

Tamron 28mm BBAR

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Overview

Nicely constructed wide angle lens from Tamron in Adaptall 2 mount. For more info on Adaptall-2 see my Adaptall-2 page. The idea is basically that Tamron made mountless lenses that would accept “Adaptall Custom Mount” fittings that were camera-mount-specific. The adapter becomes functionally part of the lens and works basically as an OEM lens would, with a few caveats.

This little lens is sharp, has good color rendition, and also has a short turning radius for fast focusing. Tamron’s BBAR (Broad Band Anti-Reflection) multicoating is very nice. In addition, the lens is short, with good depth of field, and is lightweight as well. Possibly not as contrasty as I prefer, though. Still, a great choice for a multi-camera kit with the proper adapters. Markings show that its near focus is 10″, but I verified with a ruler that it actually focuses down to 6″ even though it’s not labeled MACRO. I only have one or two lenses that focus closer than that; it’s quite impressive.

Usage

As with all Adaptall-2 lenses, open up to maximum aperture prior to mounting or unmounting the adapter. Putting a 49mm filter on it allows you to use slip-on as well as clip-on adapters. Use a wide-angle hood!

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