This 2-fold Barlow lens can be used photographically and visually. Just plug a 1.25 "eyepiece into the Barlow and you have a 2x extension, as the Barlow works like any other. The attached T2 thread The special feature of the B2T is the attached T2 thread. With the optional T2 adapter, you can connect your SLR camera directly to the Barlow and you have a photographic converter with the extension factor of about 2.5 times.
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