諭吉のNです、照明光路に緑色のプラスチック板と、切り込みを入れた紙の遮蔽板を入れて撮りました。
1 : 諭吉のN
2 : 諭吉のN
3 : 諭吉のN
LPレコードの音溝です、細く白い部分が溝底です、V形溝で底にRが付いています、ピントが外れると想像する形が違ってきます。
（ELーNIKKOR 80mm)
4 : LP音溝
| 1 N | |
|---|---|
| Maker | SIGMA |
| Model | SIGMA SD1 Merrill |
| DateTimeOriginal | 2019:02:07 17:34:54 |
| ExposureBiasValue | 0/10 |
| ExposureMode | Manual |
| ExposureProgram | Manual |
| ExposureTime | 32/10 |
| FNumber | 130/10 |
| FocalLength | 0/10 |
| ISOSpeedRatings | 200 |
| Flash | Flash did not fire |
| 2 N | |
|---|---|
| Maker | SIGMA |
| Model | SIGMA SD1 Merrill |
| DateTimeOriginal | 2019:02:07 17:39:02 |
| ExposureBiasValue | 0/10 |
| ExposureMode | Manual |
| ExposureProgram | Manual |
| ExposureTime | 130/10 |
| FNumber | 130/10 |
| FocalLength | 0/10 |
| ISOSpeedRatings | 200 |
| Flash | Flash did not fire |
| 3 N | |
|---|---|
| Maker | SIGMA |
| Model | SIGMA SD1 Merrill |
| DateTimeOriginal | 2019:02:07 17:49:06 |
| ExposureBiasValue | 0/10 |
| ExposureMode | Manual |
| ExposureProgram | Manual |
| ExposureTime | 32/10 |
| FNumber | 130/10 |
| FocalLength | 0/10 |
| ISOSpeedRatings | 200 |
| Flash | Flash did not fire |
| 4 LP | |
|---|---|
| Maker | SIGMA |
| Model | SIGMA SD1 Merrill |
| DateTimeOriginal | 2019:02:08 00:32:22 |
| ExposureBiasValue | 0/10 |
| ExposureMode | Manual |
| ExposureProgram | Manual |
| ExposureTime | 1/10 |
| FNumber | 50/10 |
| FocalLength | 0/10 |
| ISOSpeedRatings | 200 |
| Flash | Flash did not fire |