Lacerta Stand Alone Motofocus

Stand Alone automatic temperature compensation focusing, works with laptop via USB connection as well (Ascom compatible).

Product variants

More about the product

Standalone and ASCOM-compatible Motorfocus in one

The MFOC Lacerta MotorFocus allows a precise, reproducible motor focus of the telescope via a micro step-controlled stepping motor. The motor is connected via a play-free clutch, everything is completely encapsulated. It is on the one hand a standalone system and comes with a handbox with digital display, otherwise it is also usable remotely. It is fully ASCOM compliant and communicates with almost all ASCOM-compatible programs via USB, thus V-curves and autofocus are possible. The system also has full capability for temperature compensation as well as offset positions for different filters in standalone mode. The MGEN Superguider optimally works together, the automatic focus corrections are synchronized with the exposures - so they do not take place during an exposure but in between. Possible small shifts or distortions caused by the movement of the OAZ tube during refocusing are thus avoided.


MFOC Motorfocus in standalone mode with handbox:

- the GOTO function helps to reach predetermined positions quickly and accurately
- Backlash compensation is a key to accurate positioning. The Lacerta MotorFocus uses 2 methods, one for small and one for longer distances. The latter drives a new position only from one direction. If this direction is EXIT and you want 30 steps, for example, the motor automatically returns 4x the backlash value HINEIN, and then the distance reduced by 30 again. Thus, the OAZ is always in the same backlash state. Distances and directions are freely programmable.
- min. And max. Positions are freely programmable to avoid mechanical problems at the endpoints of the OAZ hub
- even if the time happens (eg after power failure), the motor slips because the motor current is programmed accordingly. The movement and the stop current can be set separately.
- the temperature is displayed in 0.01 ° division (with an accuracy of approx. 0.1 °). The correction factor (steps / degrees) can be easily determined and freely programmed with a simple test. The cable of the temperature sensor is long enough (about 180cm) to be mounted close to the temperature sensitive part of the telescope (lens cell, mirror). The sensor has an eyelet to be screwed and should be insulated against outside air if possible.
- filter offset distances are programmable relative to the main filter; in the case of temperature compensation these offsets are taken into account. You can focus on all filters, and switch to any other. Offset and compensation always work together.
- the Lacerta Motorfokus uses 3 speeds and switches automatically: micro step, full step and multi step. Multi-step is full step, but calculation and display take more steps to be faster.
- If you use the Lacerta MGEN super erguider, you can loop the cable for the recording camera at the MotorFocus and the MotorFocus sees the exposure signal. If a focus correction is necessary, it waits until the exposure is finished and is corrected only subsequently. This avoids focus corrections during the exposure, and thus possible small lateral movements of the OAZ tube and the camera (shifting).

MFOC Motorfocus in ASCOM mode:

- If the Lacerta MotorFocus is controlled via ASCOM, the software used will assume all functions
- Temperature and backlash compensation, V-curves, autofocus, whatever the software can be feasible
- only motor currents and direction of rotation are further regulated by the handbox and should be set correctly beforehand. Backlash and temperature compensation are disabled in the handbox (set to zero)
- if ASCOM is active, the letter "A" is shown on the display. Positions, status messages and temperature display are also displayed by the handbox.
- the following programs have been positively tested: Astroart 4, Astrophotography Tool 2.82, DSLR Focus V3,
FindFocus 1.2.0.0, FocusMax 3.8.0.20, Maxim DL 5.15, SharpCap 1.5.0.344.


Main features:

    Remote (ASCOM) or standalone mode
    Handbox with digital display and real-time display of all relevant information, control buttons and USB Por
    Fully encapsulated engine & transmission unit with strong stepping motor, holds and moves> 5kg
    65536 steps, reproducibility 1 micron 0.001mm
    Temperature sensor (ca.180cm long)
    Automatic temperature compensation possible
    GOTO function and filter offsets also adjustable in the standalone mode via the handbox
    Backlash Compensation (play compensation for the OAZ) - 2 types
    ASCOM driver compatible with almost any software (FocusMax, MaximDL, APT, ...)
    Free download new firmware
    Manual focusing possible (after switching off and pulling off)

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The product comes with 2 years warranty (excluding electric parts)

The product (LACERTA Motorfocus - precision stepper motor with handbox and temperature sensor. standalone or ASCOM-compatible) comes with 2 years consumer warranty.

Recommended accessories

Cable with temperature-sensor for MFOC (plug: 3,5mm)
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adapter set between black TS RPA 25 focusers and MotorFocusLA, also for respective APM and similar
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adapter set between Feathertouch 2 inch focusers and MotorFocusLA
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adapter set to attach MFOC Motofocus to black FeatherTouch 3.5 focusers
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adapter set between black TS RPA 20 focusers and MotorFocusLA, also for respective APM and similar
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adapter set between black FeatherTouch 3.0 focusers and MotorFocusLA
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adapter set between black Moonlite CR focusers and MotorFocusLA, also for respective APM and similar
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Lacerta Motofocus Adaptor for TAKAHASHI, with both mounting plates for ALL common Takahashi focusers
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LACERTA Motorfocus Motor Unit Only (additional motor, without any other accessoires)
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LACERTA Motorfocus Handbox, Stand Alone and ASCOM (without any other accessoires)
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