This post is continued from previous Samsung NX Protocol – Boot Sequence (1).
Step 3 : Lens Specific Property Request/Response
From this step, NX camera generates CLK signal at 2MHz.
In this step, NX camera inquires all detail info. which are defined in “Step 2: Block 4 : Support Property Indices”. For example, in the case of NX 30mm/F2.0 lens, the block contains 5001, 5002, 5003, 5007, 5008 and 5009. They are used for detail request in this step. If the body is NX1 (possibly NX500, too), the body inquires 2 addition information prior to 50XX request.
Step 3: Block 1 : Actual Focal Length (Only NX1)
- DCL: 0x05 0x10 0x0D 0x60 0x0C
- DLC:
- Byte 1 : Packet size in byte.
- Byte 2 – 3 : 0x20 0x01 – OK response
- Byte 4 – 6 : always 0x00 0x00 0x00
- Byte 7 : Following number of 2 byte size entries
- Byte 8 – (last byte – 1) : 2 byte sized entries
- Last Byte : Checksum. 1 byte sum value from Byte 4
I couldn’t figured out accurate meaning of all entry values. But, all prime lens has only one value and all zoom lens has 18 values. So, I guess the values are some sort of actual focal length values according to 18 zoom positions.
Step 3: Block 2 : Specific Open Aperture F-Number
(Only NX1)
- DCL: 0x05 0x10 0x0D 0x60 0x0F
- DLC:
- Byte 1 : Packet size in byte.
- Byte 2 – 3 : 0x20 0x01 – OK response
- Byte 4 – 6 : always 0x00 0x00 0x00
- Byte 7 : Following number of 1 byte size entries
- Byte 8 – (last byte – 1) : 1 byte sized entries
- Last Byte : Checksum. 1 byte sum value from Byte 4
This block is similar from Block 1. But, the value size is 1-byte.When you take a look the value, it is quite close to real F-number of lens. For ex, 16-50 Pz lens has F/3.5 – 5.6 value, and the value of the block range is 0x3B – 0x52. This value has same with 18-55 lens.
So, I guess this block also contains 18 zoned actual open aperture F-numbers. So, prime lens has only one value.
After this entry, NX camera inquires for the entries which are shown in “Step 2: Block 4 : Support Property Indices”
In according to the table in Step2: Block4, Entries, 5001, 5002, 5003, 5007, 5008 are 5009 shown for all lens and bodies. And entries after that, some entries only available for only some lenses.
I will not list up all the entries, but some.
Step 3: Block 5001
- DCL: 0x05 0x10 0x06 0x50 0x01
- DLC:
- Byte 1 : Packet size in byte.
- Byte 2 – 3 : 0x20 0x01 – OK response
- Byte 4 – 12 : 0x00 0x02 0x01 0x00 0x00 0x02 0x00 0x04 0x00 0x01 0x02 0x03
First entry of 50XX inquires. All NX camera and lens has same values.
Step 3: Block 5007: Farthest / Closest Focus Positions(?)
- DCL: 0x05 0x10 0x06 0x50 0x07
- DLC:
- Byte 1 : Packet size in byte.
- Byte 2 – 3 : 0x20 0x01 – OK response
- Byte 4 – 6 : 0x00 0x04 0x20
- Byte 7 – 10 : 0x?? 0x?? 0x?? 0x?? <– not identified values which are vary for each lens.
- Byte 11 : 0x01
- Byte 12 – 13 : 0x?? 0x?? <– farthest focus position
- Byte 14 – 15 : 0x?? 0x?? <– closest focus position
- Byte 16 – 17 : 0x00 0x01
This entry contains far most and closest focus positions.
Step 3: Block 5008 : Fixed / Zoom Lens Indicator(?)
- DCL: 0x05 0x10 0x06 0x50 0x08
- DLC:
- Byte 1 : Packet size in byte.
- Byte 2 – 3 : 0x20 0x01 – OK response
- Byte 4 – 7 : 0x00 0x02 0x00 0x01
- Byte 8 : 0x?? <– not identified value.
- Byte 9 – 10 : 0x01 0x01
- Byte 11 : 0x?? <– fixed / zoom lens indicator(?)
- Byte 12 : 0x01
Byte 11 would be fixed / zoom lens indicator.
Step 3: Block 5009 : Max / Min Aperture Indicators
- DCL: 0x05 0x10 0x06 0x50 0x09
- DLC:
- Byte 1 : Packet size in byte.
- Byte 2 – 3 : 0x20 0x01 – OK response
- Byte 4 – 10 : 0x00 0x02 0x20 0x01 0x01 0x01 0x01
- Byte 11 : 0x?? <– max aperture indicator
- Byte 12 : 0x?? <– min aperture indicator
Value in byte 11 and 12 are about min / max aperture indicator. They are not about actual aperture F-number. It is more likely describes how many steps are for aperture values. For example, In case of 16-50PZ lens, it shows the range is from 0x01 to 0x1A, which means there are 26 steps. In case of 45mm /F1.8 lens, the range is from 0x01 to 0x24, which means there are 32 steps for setting its aperture.
After Step 3. the NX camera tries to set initial aperture position.
For your information, you can see detail dumps of DCL and DLC values when NX1 is power up with NX 16-50 PZ lens.
DCL : 0x03 0xAA 0x55
DLC : 0x03 0xAA 0x55
DCL : 0x03 0x10 0x01 0x00
DLC : 0x20 0x01 0x00 0x64 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x1F 0x00 0x00 0x00
0x0E 0x10 0x01 0x10 0x05 0x10 0x06 0x10
0x07 0x10 0x08 0x10 0x09 0x10 0x0C 0x10
0x0D 0x11 0x01 0x11 0x02 0x11 0x0B 0x11
0x03 0x11 0x04 0x11 0x09 0x00 0x00 0x00
0x05 0x40 0x01 0x40 0x02 0x40 0x03 0x40
0x04 0x40 0x06 0x00 0x00 0x00 0x0E 0x50
0x01 0x50 0x02 0x50 0x03 0x50 0x07 0x50
0x08 0x50 0x09 0x50 0x0A 0x50 0x0C 0x50
0x0D 0x50 0x0E 0x50 0x10 0x50 0x11 0x50
0x13 0x50 0x14 0x00 0x00 0x00 0x1E 0x60
0x01 0x60 0x02 0x60 0x03 0x60 0x04 0x60
0x05 0x60 0x06 0x60 0x07 0x60 0x08 0x60
0x09 0x60 0x0A 0x60 0x0B 0x60 0x0C 0x60
0x0D 0x60 0x0E 0x60 0x0F 0x60 0x10 0x60
0x11 0x60 0x12 0x60 0x13 0x60 0x14 0x60
0x16 0x60 0x17 0x60 0x18 0x60 0x1A 0x60
0x1B 0x60 0x19 0x60 0x1C 0x60 0x1D 0x60
0x24 0x60 0x25 0x00 0x00 0x00 0x04 0x70
0x01 0x70 0x02 0x70 0x03 0x70 0x04 0x28
0x53 0x41 0x4D 0x53 0x55 0x4E 0x47 0x3F
0x3F 0x4E 0x58 0x20 0x31 0x36 0x2D 0x35
0x30 0x6D 0x6D 0x20 0x46 0x33 0x2E 0x35
0x2D 0x35 0x2E 0x36 0x20 0x50 0x6F 0x77
0x65 0x72 0x20 0x5A 0x6F 0x6F 0x6D 0x00
0x07 0x58 0x4C 0x31 0x34 0x30 0x31 0x00
0x0C 0x30 0x31 0x2E 0x33 0x30 0x5F 0x30
0x31 0x2E 0x35 0x30 0x00 0x0D 0x?? 0x??
0x?? 0x?? 0x?? 0x?? 0x?? 0x?? 0x?? 0x??
0x?? 0x?? 0x??
DCL : 0x05 0x10 0x0D 0x60 0x0C
DLC : 0x2C 0x20 0x01 0x00 0x00 0x00 0x12 0x01
0x4A 0x01 0x57 0x01 0x6E 0x01 0x88 0x01
0xA2 0x01 0xBF 0x01 0xDE 0x02 0x00 0x02
0x24 0x02 0x49 0x02 0x73 0x02 0x9F 0x02
0xCD 0x02 0xFE 0x03 0x35 0x03 0x6E 0x03
0xAA 0x03 0xCA 0x6A
DCL : 0x05 0x10 0x0D 0x60 0x0F
DLC : 0x1A 0x20 0x01 0x00 0x00 0x00 0x12 0x3B
0x3C 0x3D 0x3F 0x40 0x41 0x43 0x44 0x45
0x47 0x48 0x4A 0x4B 0x4D 0x4E 0x50 0x51
0x52 0x04
DCL : 0x05 0x10 0x06 0x50 0x01
DLC : 0x0F 0x20 0x01 0x00 0x02 0x01 0x00 0x00
0x02 0x00 0x04 0x00 0x01 0x02 0x03
DCL : 0x05 0x10 0x06 0x50 0x02
DLC : 0x0D 0x20 0x01 0x00 0x02 0x01 0x01 0x01
0x02 0x00 0x02 0x00 0x01
DCL : 0x05 0x10 0x06 0x50 0x03
DLC : 0x0D 0x20 0x01 0x00 0x02 0x01 0x00 0x00
0x02 0x00 0x02 0x00 0x01
DCL : 0x05 0x10 0x06 0x50 0x07
DLC : 0x11 0x20 0x01 0x00 0x04 0x20 0x03 0xE8
0x03 0xE8 0x01 0x03 0x25 0x12 0x77 0x00
0x01
DCL : 0x05 0x10 0x06 0x50 0x08
DLC : 0x0C 0x20 0x01 0x00 0x02 0x00 0x01 0x01
0x01 0x01 0x12 0x01
DCL : 0x05 0x10 0x06 0x50 0x09
DLC : 0x0C 0x20 0x01 0x00 0x02 0x20 0x01 0x01
0x01 0x01 0x1A 0x01
DCL : 0x05 0x10 0x06 0x50 0x0A
DLC : 0x0E 0x20 0x01 0x00 0x02 0x01 0x02 0x01
0x02 0x00 0x03 0x00 0x01 0x02
DCL : 0x05 0x10 0x06 0x50 0x0C
DLC : 0x0D 0x20 0x01 0x00 0x02 0x01 0x00 0x00
0x02 0x00 0x02 0x00 0x01
DCL : 0x05 0x10 0x06 0x50 0x0D
DLC : 0x0F 0x20 0x01 0x00 0x02 0x01 0x01 0x01
0x02 0x00 0x04 0x00 0x01 0x10 0x11
DCL : 0x05 0x10 0x06 0x50 0x0E
DLC : 0x12 0x20 0x01 0x00 0x02 0x01 0x00 0x00
0x02 0x00 0x07 0x00 0x01 0x02 0x03 0x05
0x0A 0x1E
DCL : 0x05 0x10 0x06 0x50 0x10
DLC : 0x0D 0x20 0x01 0x00 0x02 0x01 0x00 0x00
0x02 0x00 0x02 0x00 0x01
DCL : 0x05 0x10 0x06 0x50 0x11
DLC : 0x11 0x20 0x01 0x00 0x04 0x00 0x01 0x00
0x01 0x00 0x01 0x01 0x00 0x12 0x00 0x00
0x01
DCL : 0x05 0x10 0x06 0x50 0x13
DLC : 0x11 0x20 0x01 0x00 0x02 0x01 0x03 0x03
0x02 0x00 0x06 0x00 0x01 0x02 0x03 0x04
0x05
DCL : 0x05 0x10 0x06 0x50 0x14
DLC : 0x0E 0x20 0x01 0x00 0x02 0x01 0x00 0x00