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koji kawakami | profile | all galleries >> Lens Modifications >> Contax G-Planar 45mm to M-mount conversion tree view | thumbnails | slideshow

Minolta MC Rokkors to EF-mount conversions | Contax G-Biogon 21mm to M-mount conversion | Contax G-Biogon 28mm to E-mount conversion | Contax G-Planar 35mm to E-mount conversion | Contax G-Planar 45mm to M-mount conversion | Contax G-Sonnar 90mm to F-mount conversion | Canon FD 55mm F1.2 S.S.C. to EF-mount conversion | How I made a Miranda lens adapter for E-mount | Minolta Rokkor-PF 45mm to E-mount conversion

Contax G-Planar 45mm to M-mount conversion

The reason for this modification is that I do not like any of Contax_G to Sony_E or μ4/3 adapters. So I planned to make my personal
G-Planar 45mm with its own helicoid for ease of focusing and E-mount without an another adapter. I happened to have an M42->μ4/3
adapter with helicoid, which extends from 12mm to 18mm. There is not much space left between the lens block and the M-mount base,
which should be less than about 12mm between in order to focus to infinity. It looked doable to me, then I started my own conversion.
P45m_1
P45m_1
P45m_2
P45m_2
P45m_3
P45m_3
P45m_4
P45m_4
P45m_5
P45m_5
P45m_6
P45m_6
P45m_7
P45m_7
P45m_8
P45m_8
P45m_9
P45m_9
P45m_10
P45m_10
P45m_11
P45m_11
P45m_12
P45m_12
P45m_13
P45m_13
P45m_14
P45m_14
with Ricoh GXR-M
with Ricoh GXR-M
The lens head + Portable-bellows + NEX
The lens head + Portable-bellows + NEX
with a7
with a7
length = 50mm, weight = 193g (as an E-mount lens)
length = 50mm, weight = 193g (as an E-mount lens)
with NIKON Z7
with NIKON Z7
Ai Nikkor 50/1.4S @f8 NEX5
Ai Nikkor 50/1.4S @f8 NEX5
Hibiscus @f5.6 a7
Hibiscus @f5.6 a7
in Hakata @f? a7
in Hakata @f? a7
Shamrock @f16 0.19m Z7
Shamrock @f16 0.19m Z7
Bloor St @f5.6 Z7
Bloor St @f5.6 Z7