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This high quality reducer for photographic use is designed to shorten the effective focal length of your ED81S, ED103S or ED115S refractor. This will allow for shorter exposure times and a wider field of view. For those using an SLR or Digital SLR, you will need the optional “Direct Wide Photo Adapter” #3878 or #3876 for the Canon EOS type cameras and the appropriate T-ring to fit your camera. |
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