What the thread found

• Bartech BFD and BDR units lack the motor speed adjustment feature available on Preston systems; the motor speed cannot be changed via forward/reverse switch control
• A potential workaround involves calibrating a shorter focus distance to give the hand unit wheel a wider operating range, which may help with close focus work

Depends on

• The workaround suggestion was speculative and not confirmed as tested or effective
• Discussion conflates different Bartech models (BFD and BDR) without clarifying whether speed control limitations apply equally to both

Gear in this thread

FI+Z, BFD

Same gear or parts

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