Viltrox M42 (C/Y) to eMount Focal Reducer - Speed Booster

Winterfrost · Jun 15, 2016

Hi Forum,

i've known Viltrox Adapters only as cheap EF/EF-S to eMount Adapters, in the sense of Commlite & dozen of others, but now it get's interesting - Viltrox is also making a "Lens Turbo" or Speed Booster in that term, Focal Reducer similar to the famous Zhongyi/Mitakon Lens Turbo (II), and also MetaBones SpeedBooster (Ultra) Series.

The Viltrox Adapter looks nice & clean from appearance, i don't have it, spotted it just today Morning on aliexpress and amazon, but what i like onto it: it does feature a detachable Tripod Mount...and looks well being made.

Viltrox also does a C/Y eMount Focal Reducer adapter, and i could use another one...so the Question here is: anybody so far bought the M42 or C/Y Viltrox Focal Reducer here yet?

Original-VILTROX-M42-E-Adapter-Ring-M42-Mount-Lens-Adapter-Focal-Reducer-Telecompressor-Speed-Booster-for.jpg_640x640.jpg

Original-VILTROX-M42-E-Adapter-Ring-M42-Mount-Lens-Adapter-Focal-Reducer-Telecompressor-Speed-Booster-for.jpg

--
"The Best Camera is the One That's with You" ~ Chase Jarvis

Tom Caldwell · Jun 15, 2016

Marc

I am not sure how many focal reduction manufacturers there are. I did count a few, but there are probably more marketing names than there are actual manufacturers.

One way of perhaps telling the difference is by the shape of their usually supplied tried mount. These seem to be manufacturer specific.

I am also not sure of the optics but suggest that once the first set of optics has been designed it is only internal placement and the shape of the host mount that varies. The object light from the lens is made to focus at a certain point and this point must have a certain design commonality across mount types.

Therefore once one mount adapter is made successfully to focal reduction principles thn it must be just a factor of demand and spare production capacity to make more.

Of course the elements may simply not be capable of being fitted inside the shortened length of the focal reduction version of the plain adapter.

Leica M is a case in point - in my rudimentary optics I worked out that the focal reduction elements would actually be inside the camera body cavity. It might be possible to fit such an adapter on a Leica RF body or even on a Ricoh GXR M mount module, but the market would be infinitesimal and not worthwhile pursuing considering the design and manufacturing logistics involved.

Even the Konica AR is probably too short. Even on the Canon FD and M42 the rear element does noticeably protrude on the M4/3 adapter.

Winterfrost · Jun 16, 2016

Tom Caldwell said:
Marc

I am not sure how many focal reduction manufacturers there are. I did count a few, but there are probably more marketing names than there are actual manufacturers.

One way of perhaps telling the difference is by the shape of their usually supplied tried mount. These seem to be manufacturer specific.

I am also not sure of the optics but suggest that once the first set of optics has been designed it is only internal placement and the shape of the host mount that varies. The object light from the lens is made to focus at a certain point and this point must have a certain design commonality across mount types.

Therefore once one mount adapter is made successfully to focal reduction principles thn it must be just a factor of demand and spare production capacity to make more.

Of course the elements may simply not be capable of being fitted inside the shortened length of the focal reduction version of the plain adapter.

Leica M is a case in point - in my rudimentary optics I worked out that the focal reduction elements would actually be inside the camera body cavity. It might be possible to fit such an adapter on a Leica RF body or even on a Ricoh GXR M mount module, but the market would be infinitesimal and not worthwhile pursuing considering the design and manufacturing logistics involved.

Even the Konica AR is probably too short. Even on the Canon FD and M42 the rear element does noticeably protrude on the M4/3 adapter.

v12nut · Jun 17, 2016

Might be a dumb question guy's but............... what would it take to adapt this to a Samsung nx mount ? register distance for the nx is around 25mm.

Are there any gizmos that are adaptable or are they all camera specific ?

cheers

Winterfrost · Jun 17, 2016

v12nut said:
Might be a dumb question guy's but............... what would it take to adapt this to a Samsung nx mount ? register distance for the nx is around 25mm.

Are there any gizmos that are adaptable or are they all camera specific ?

cheers

Various adapters for NX Mount are being avialable - but i don't know *any* focal reducer (Speed Booster or "Lens Turbo") for Samsung NX Mount - the market share is too tiny, and now Samsung had withdrawn from the NX Mount & Mirrorless stage...it's History now...sad, but true.

Check out K&F Concept Adapters for NX Mount. ;-)

v12nut · Jun 17, 2016

Thanks Marc,

It is the total lack of these items that prompted me to think about possibly adapting one to work with the nx (not ready to ditch my nx quite yet) this particular Viltrox looks like it may be possible to move the optics within the housing and as it is made for around an 18mm register distance, possibly stretching it to 25mm might not have been too out the box.

cheers

brian · Jun 18, 2016

v12nut said:
Thanks Marc,

It is the total lack of these items that prompted me to think about possibly adapting one to work with the nx (not ready to ditch my nx quite yet) this particular Viltrox looks like it may be possible to move the optics within the housing and as it is made for around an 18mm register distance, possibly stretching it to 25mm might not have been too out the box.

cheers

I tried on several occasions to design a Speed Booster to fit the NX cameras, but just couldn't get a true 0.71x version with high optical quality to work. The issue is that the NX cameras buried the sensor in a deep rectangular "canyon" of metal/plastic, and its just not possible to get the optics close enough for a good result. Allowing the magnification to drift beyond 0.71x might work, as would ignoring image quality, neither of which appealed to me at all.

The NX mini would be a completely different animal, and it would be possible to design a reducer of 0.64x or even less for it. However, Samsung is dead, so it would be a pointless waste of development money.

v12nut · Jun 18, 2016

brian said:
v12nut said:

Thanks Marc,

It is the total lack of these items that prompted me to think about possibly adapting one to work with the nx (not ready to ditch my nx quite yet) this particular Viltrox looks like it may be possible to move the optics within the housing and as it is made for around an 18mm register distance, possibly stretching it to 25mm might not have been too out the box.

cheers

Click to expand...

I tried on several occasions to design a Speed Booster to fit the NX cameras, but just couldn't get a true 0.71x version with high optical quality to work. The issue is that the NX cameras buried the sensor in a deep rectangular "canyon" of metal/plastic, and its just not possible to get the optics close enough for a good result. Allowing the magnification to drift beyond 0.71x might work, as would ignoring image quality, neither of which appealed to me at all.

The NX mini would be a completely different animal, and it would be possible to design a reducer of 0.64x or even less for it. However, Samsung is dead, so it would be a pointless waste of development money.

Search

Viltrox M42 (C/Y) to eMount Focal Reducer - Speed Booster

Winterfrost

Senior Member

Tom Caldwell

Community Leader

Winterfrost

Senior Member

v12nut

Forum Enthusiast

Winterfrost

Senior Member

v12nut

Forum Enthusiast

brian

Guest

v12nut

Forum Enthusiast

Keyboard shortcuts