Mamiya M645 System Extension Tube Data
Basic Extension Tube Information
No 1 = 11.8mm extension - Cat. #210-250
No. 2 = 23.6mm extension - Cat. #210-251
No. 3S = 35.4mm extension - Cat. #210-252
Close-up Table for 80mm f/2.8 Lens with Auto Bellows for 645 Cameras
| Extension | | Magnification | | Lens-to-subject | | Area covered (in.) distance (in.) | | Exposure compensation | |
| 48.0mm | 0.60 | 6.94 | 2.72 x 3.66 | 1.5 |
| 64.0mm | 0.80 | 5.63 | 2.06 x 2.75 | 1.5 |
| 80.1mm | 1.00 | 4.84 | 1.66 x 2.22 | 2.0 |
| 96.1mm | 1.20 | 4.28 | 1.38 x 1.84 | 2.5 |
| 112.1mm | 1.40 | 3.94 | 1.19 x 1.56 | 2.5 |
| 120.1mm | 1.50 | 3.78 | 1.09 x 1.47 | 2.5 |
| 128.1mm | 1.60 | 3.66 | 1.03 x 1.38 | 3.0 |
| 144.1mm | 1.80 | 3.44 | 0.91 x 1.22 | 3.0 |
| 160.1mm | 2.00 | 3.28 | 0.81 x 1.09 | 3.0 |
| 176.1mm | 2.20 | 3.13 | 0.75 x 1.03 | 3.5 |
| 178.7mm | 2.23 | 3.06 | 0.75 x 0.97 | 3.5 |
Close-up Table for Extension Tubes and Auto Macro Spacer for 80mm f/4 Macro
Method used to calculate exposure factor: Expsosure Compensation Factor = (Total Length ^2) / (Lens Focal Length ^2)
The lenses shown are most suited for use with extension tubes.
| Close-up Table for Extension Tubes and Auto Macro Spacer for 80mm f/4 Macro | ||||||||
|---|---|---|---|---|---|---|---|---|
| Lens | ExtensionTube | Magnification | Subject Dist. (in.) | Area covered (in.) | Exposure Compensation | |||
| Min. | Max. | From | To | From | To | |||
| 80mm f/2.8 | No. 1 | 0.15 | 0.30 | 23.1 | 12.2 | 11.1 x 15.0 | 5.5 x 7.4 | 1.3 |
| No. 2 | 0.29 | 0.45 | 12.4 | 8.7 | 5.6 x 7.5 | 3.7 x 5.0 | 1.6 | |
| No. 3-S | 0.44 | 0.60 | 8.8 | 7.0 | 3.7 x 5.0 | 2.8 x 3.7 | 2.0 | |
| No. 1+No. 3S | 0.59 | 0.74 | 7.0 | 5.9 | 2.8 x 3.7 | 2.2 x 3.0 | 2.6 | |
| No. 2+No. 3S | 0.73 | 0.89 | 5.9 | 5.2 | 2.2 x 3.0 | 1.8 x 2.4 | 3.0 | |
| No. 1+2+3S | 0.88 | 1.04 | 5.2 | 4.7 | 1.9 x 2.5 | 1.6 x 2.1 | 3.5 | |
| 80mm f/1.9 | No. 1 | 0.15 | 0.30 | 22.4 | 11.6 | 11.1 x 15.0 | 5.5 x 7.2 | 1.3 |
| No. 2 | 0.29 | 0.44 | 11.7 | 8.1 | 5.6 x 7.5 | 3.7 x 5.0 | 1.6 | |
| No. 3-S | 0.44 | 0.59 | 8.1 | 6.3 | 3.7 x 5.0 | 2.8 x 3.7 | 2.0 | |
| No. 1+No. 3S | 0.59 | 0.74 | 6.3 | 5.2 | 2.8 x 3.7 | 2.2 x 3.0 | 2.6 | |
| No. 2+No. 3S | 0.74 | 0.89 | 5.2 | 4.5 | 2.2 x 3.0 | 1.9 x 2.5 | 3.0 | |
| No. 1+2+3S | 0.88 | 1.03 | 4.5 | 4.0 | 1.9 x 2.5 | 1.6 x 2.1 | 3.5 | |
| 55mm f/2.8 | No. 1 | 0.27 | 0.36 | 10.4 | 6.3 | 7.7 x 10.4 | 4.6 x 6.2 | 1.5 |
| No. 2 | 0.43 | 0.57 | 5.3 | 4.0 | 3.8 x 5.2 | 2.9 x 3.9 | 2.0 | |
| No. 3-S* | 0.54 | 0.78 | 3.6 | 3.0 | 2.6 x 3.4 | 2.1 x 2.8 | 2.6 | |
| No. 1+No. 3S* | 0.85 | 0.99 | 2.7 | 2.4 | 1.9 x 2.6 | 1.6 x 2.2 | 3.3 | |
| No. 2+No. 3S* | 1.07 | 1.21 | 2.2 | 2.0 | 1.5 x 2.1 | 1.4 x 1.8 | 4.3 | |
| No. 1+2+3S* | 1.28 | 1.42 | 1.9 | 1.7 | 1.3 x 1.7 | 1.1 x 1.6 | 5.3 | |
| 110mm f/2.8 | No. 1 | 0.11 | 0.22 | 43.6 | 23.0 | 15.3 x 20.6 | 7.5 x 10.1 | 1.3 |
| No. 2 | 0.21 | 0.33 | 23.4 | 16.5 | 7.6 x 10.3 | 5.0 x 6.8 | 1.5 | |
| No. 3-S* | 0.32 | 0.43 | 16.7 | 13.2 | 5.1 x 6.9 | 3.8 x 5.1 | 1.75 | |
| No. 1+No. 3S* | 0.43 | 0.54 | 13.3 | 11.2 | 3.8 x 5.1 | 3.0 x 4.1 | 2.0 | |
| No. 2+No. 3S* | 0.54 | 0.65 | 11.3 | 9.9 | 3.0 x 4.1 | 2.5 x 3.4 | 2.3 | |
| No. 1+2+3S* | 0.64 | 0.75 | 9.9 | 8.9 | 2.5 x 3.4 | 2.2 x 2.9 | 2.6 | |
| 150mm F/2.8 & f/3.5 | No. 1 | 0.08 | 0.21 | 85.9 | 35.4 | 21.5 x 29.0 | 7.9 x 10.6 | 1 |
| No. 2 | 0.15 | 0.28 | 45.7 | 27.5 | 10.7 x 14.4 | 5.8 x 7.8 | 1.3 | |
| No. 3-S* | 0.23 | 0.36 | 32.6 | 22.9 | 7.1 x 9.6 | 4.5 x 6.1 | 1.5 | |
| No. 1+No. 3S* | 0.31 | 0.44 | 25.9 | 20.0 | 5.3 x 7.2 | 3.7 x 5.0 | 1.6 | |
| No. 2+No. 3S* | 0.38 | 0.51 | 21.9 | 17.9 | 4.3 x 5.8 | 3.2 x 4.3 | 1.9 | |
| No. 1+2+3S* | 0.46 | 0.59 | 19.3 | 16.4 | 3.6 x 4.8 | 2.8 x 3.7 | 2.0 | |
| 80mm f/4.0 Macro | without Spacer | 0.03 | 0.50 | 132.3 | 7.2 | 65.4 x 88.2 | 3.3 x 4.4 | |
| with Spacer | 0.50 | 1.00 | 7.1 | 4.0 | 3.3 x 4.4 | 1.7 x 2.2 | ||