SetAdjData / GetAdjData

GetAdjData: 0xfc SetAdjData: 0xfb

Payload Structure

Sending to TAP-in console

0xfc-> Request for the adjustment data
No arguments, just used to request the lens be disconnected
0xfb <ADJDATA>-> Set the ADJDATA on the lens

Receiving from TAP-in console

0xfc <ADJDATA>-> The ADJDATA from the lens
0xfb <FAILURE>-> Whether or not a failure occurred
FAILURE is a boolean value (0x00: no failure; 0x01: failure)

AdjData

This contains all of the settings for the lens

Structure

Offset	Field	Size	Description
`0`	MANUAL_FOCUS_OVERRIDE	`1`	Full time manual focus override settings (packed byte)
`1`	VC_MODE	`1`	Vibration Compensation mode selection - `0x01`: Viewfinder Priority - `0x02`: Standard Priority - `0x03`: Capturing Priority
`2-10`	UNKNOWN	`9`	Unsure, never seen these set or change (I only have a prime lens without any focus limiter settings) Index 5 is `0x01` and index 9 is `0x01` on my lens (I would love some feedback about your lens here)
`11-18`	FOCUS_ADJUSTMENT_1	`8`	The focus adjustments for the closest focus
`19-26`	FOCUS_ADJUSTMENT_2	`8`	The focus adjustments for the medium distance focus
`27-34`	FOCUS_ADJUSTMENT_3	`8`	The focus adjustments for the farthest focus

Focus Adjustments

For focus adjustments, each of the 8 bytes corresponds to a slider position.

In this image:

FOCUS_ADJUSTMENT_1 refers to the 0.29 m focus options
FOCUS_ADJUSTMENT_2 refers to the 0.77 m focus options
FOCUS_ADJUSTMENT_3 refers to the Infinite m focus options

Each of the FOCUS_ADJUSTMENT_<N> fields contains 8 bytes. Each byte correlates to a slider from top to bottom.

Focus adjustment value encoding

Slider Value Encoding

Each slider value is represented by a single signed byte (int8).
Positive values are stored directly, while negative values use two’s complement encoding.

For example:

Slider Position	Byte (Hex)	Byte (Decimal)	Notes
-20 (leftmost)	`0xEC`	236	Two’s complement for -20
-10 (half-left)	`0xF6`	246	Two’s complement for -10
0 (center)	`0x00`	0	Two’s complement for 0
20 (rightmost)	`0x14`	20	Two’s complement for 20

07 November 2025