3.5" Focuser R/P
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The FTF3515B-A is a high-end focuser for APO refractor telescopes or big RCs which are equipped with large 32 correctors for astrophotography.
The FTF3545B-A is a high-end focuser for APO refractor telescopes or big RCs which are equipped with large 32 correctors for astrophotography.