Feather Touch Focuser M57

M57-threaded Feather Touch focuser has the unique drawtube which has M57 female as BORG standard. This allows for the rigid and accurate connection with reducer/flattener and cameras. Also all of FTF-M57s provided by Hutech has the anti-reflection sheet inside drawtube. See the comparison. Right is the original without it.

ftf-m57As the picture shows, there is huge difference. As a result, adding the sheet obviously create higher image contrast. I definitely request all of BORG dealers to apply the sheet before shipping to their customers. But if your FTF-M57 has no sheet, contact dealers you purchased.  My recommended size is 159mm x 59mm.  You will have huge improvement.

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~ by tedishikawa on August 26, 2013.

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