Camera Lenses Accessories

rb Series - Extension Tubes

Auto Extension Tubes

Mamiya extension tubes are precision machined for close-up and macrophotography. They are fully meter coupled for automatic or manual exposure. The two automatic tubes can be used individually or in combination.

No 1 = 45mm extension
No. 2 = 82mm extension
No. 1 + 2 = 127mm extension
Since the camera body bellows features an extension of 46mm, using the tubes provides a total maximum extension of 173mm.
No. 1 for rb SD camera only: Cat. #301-240. Weight: 11.6 oz., 530 g.
No. 2 for rb SD camera only: Cat. #301-242. Weight: 14.5 oz., 4I0 g.
No. 1 for rb SD, rb PRO-S and rb Pro camera: Cat. #214-450. Weight: 11.6 oz., 530 g.
No. 2 for rb SD, rb PRO-S and rb Pro camera only: Cat. #214-451. Weight: 14.5 oz., 410 g.

140mm f/4.5 Macro at closest focus

140mm f/4.5 Macro with No. 1

140mm f/4.5 Macro with No. 2

140mm f/4.5 Macro with No. 1 & 2
Close-Up Table For Extension Tubes
Lens Extension Tube Magnification Subject Dist. (In.) Area covered (in.)
Min. Max. From To From To
65mm F4L-A No. 1 0.68 1.38 3.4 1.5 3.2 x 4.0 1.6 x 2.0
75mm f/3.5L No. 1 0.60 1.21 7.4 2.5 3.7 x 4.6 1.9 x 2.3
No. 2 1.10 1.70 2.8 1.8 2.0 x 2.5 1.3 x 1.6
No. 1 + No. 2 1.68 2.30 1.8 1.3 1.3 x 1.6 .9 x 1.2
90mm f/3.5W No. 1 0.50 1.01 7.9 4.3 4.4 x 5.5 2.2 x 2.7
No. 2 0.91 1.42 4.7 3.3 2.4 x 3.0 .5 x 1.9
No. 1 + No. 2 1.41 1.92 3.3 2.7 1.6 x 1.9 1.1 x 1.4
110mm f/2.8W No. 1 0.41 0.82 12.6 17.1 5.4 x 6.7 2.7 x 3.3
No. 2 0.74 1.15 7.7 5.6 3.0 x 3.7 1.9 x 2.4
No. 1 + No. 2 1.15 1.56 5.6 4.6 1.9 x 2.4 1.4 x 1.8
127mm f/3.5W No. 1 0.35 0.72 16.4 9.2 6.2 x 7.7 3.1 x 3.8
No. 2 0.65 1.01 10.0 7.2 3.4 x 4.3 2.2 x 2.7
No. 1 + No. 2 1.00 1.36 7.2 5.9 2.2 x 2.8 1.6 x 2.0
Macro 140mm f/4.5M/L-A No. 1 0.32 0.64 20.6 11.7 6.9 x 8.6 3.4 x 4.3
No. 2 0.58 0.90 12.6 9.2 3.8 x 4.7 2.4 x 3.0
No. 1 + No. 2 0.90 1.22 9.2 7.6 2.5 x 3.1 1.8 x 2.2
150mm f/3.5W No. 1 0.30 0.61 23.4 13.4 7.4 x 9.1 3.7 x 4.5
No. 2 0.55 0.85 14.5 10.6 4.1 x 5.0 2.6 x 3.2
No. 1 + No. 2 0.85 1.15 10.7 8.8 2.6 x 3.2 1.9 x 2.4
180mm f/4.5W-N No. 1 0.25 0.51 33.3 19.2 8.7 x 10.9 4.3 x 5.4
No. 2 0.46 0.72 20.7 15.2 4.8 x 5.9 3.1 x 3.8
No. 1 + No. 2 0.71 0.97 15.3 12.6 3.1 x 3.9 2.3 x 2.8
250mm f/4.5W No. 1 0.18 0.37 63.0 36.7 12.0 x 14.8 5.9 x 7.3
No. 2 0.34 0.52 39.4 29.2 6.6 x 8.1 4.2 x 5.2
No. 1 + No. 2 0.52 0.71 29.3 24.4 4.3 x 5.3 3.1 x 3.9
360mm f/6W No. 1 0.13 0.26 135.4 79.7 17.4 x 21.6 8.6 x 10.7
No. 2 0.23 0.36 85.7 63.9 9.5 x 11.9 6.1 x 7.6
No. 1 + No. 2 0.36 0.49 64.3 53.9 6.1 x 7.6 4.5 x 5.6
210mm f/4.5 APO No. 1 0.21 0.43 46.8 27.3 10.3 x 12.8 5.1 x 6.3
No. 2 0.40 0.61 29.3 21.8 5.7 x 7.0 3.6 x 4.5
No. 1 + No. 2 0.60 0.82 21.9 18.2 3.7 x 4.5 2.7 x 3.3
250mm f/4.5 APO No. 1 0.18 0.37 62.7 36.2 12.0 x 14.9 5.9 x 7.4
No. 2 0.34 0.52 39.1 28.7 6.6 x 8.2 4.2 x 5.2
No. 1 + No. 2 0.52 0.71 30.8 23.9 4.3 x 5.3 3.1 x 3.9
350mm f/5.6 APO No. 1 0.13 0.26 123.6 70.9 16.9 x 21.0 8.3 x 10.4
No. 2 0.24 0.37 76.6 56.1 9.3 x 11.5 5.9 x 7.4
No. 1 + No. 2 0.37 0.50 56.3 46.5 6.0 x 7.4 4.4 x 5.5
 
 
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