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Meike Mount Adapter S-AF4 for Sony E-Mount to Canon EF/EF-S

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LewToo said:
"... focus past infinity ..."

Infinity focus being defined as the the most distant point to which the lens is supposed to designed to focus. With a simple lens and a FF 35mm sensor this would be the closest point point between the lens and the sensor where the image circle coincides with the corners of the sensor rectangle. Forgive my ignorance but I would expect most lenses to hit a hard stop at that point.
Click to expand...
I guess you haven't used that many on adaptors then. Most of them focus past infinity and when you manually focus you can tell where infinity actually is by focusing past it and back again, thus ensuring your shots are sharp in the far distance. If your lens stops before going past infinity you'll never be quite sure if you actually achieved maximum sharpness. I'm talking about the tolerance on some adaptors and how tiny margins can result in failure. Most adaptors are not built to a tolerance that ensures the infinity mark is actually where it should be, in fact plenty of lenses aren't either, or they are marked incorrectly.

--
667......neighbour of the beast...
http://bit.ly/1K1oqkv
 
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You are correct that I have not used many adapters. My 'old' lenses are Pentax "K" mount manual primes. I have not encountered any problems with them in that regard. I also never pay much attention to the 'distance marks' on the lens barrel.

It has crossed my mind that a "short" adapter would allow me to move the lens closer to sensor thus reducing the image circle to coincide with the corners of the cropped frame. In theory this would increase the distance limit of the infinity focus point as well as gather more light for the sensor. It is the opposite effect of a Macro Bellows. I am gathering parts to cobble together such a bellows (too curious I guess).
 
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LewToo said:
You are correct that I have not used many adapters. My 'old' lenses are Pentax "K" mount manual primes. I have not encountered any problems with them in that regard. I also never pay much attention to the 'distance marks' on the lens barrel.
Click to expand...
Just as well in my experience.
LewToo said:
It has crossed my mind that a "short" adapter would allow me to move the lens closer to sensor thus reducing the image circle to coincide with the corners of the cropped frame. In theory this would increase the distance limit of the infinity focus point as well as gather more light for the sensor. It is the opposite effect of a Macro Bellows. I am gathering parts to cobble together such a bellows (too curious I guess).
Click to expand...
I guess so, I can tell you that adaptors on the A7 are a bit hit or miss, at least cheaper ones are anyway. That being said my cheapest one does focus past infinity and I can use my old OM lenses on the A7 no problem.
 
LewToo said:
"... focus past infinity ..."

Infinity focus being defined as the the most distant point to which the lens is supposed to be designed to focus. With a simple lens and a FF 35mm sensor this would be the closest point point between the lens and the sensor where the image circle coincides with the corners of the sensor rectangle. Forgive my ignorance but I would expect most lenses to hit a hard stop at that point.
Click to expand...
Lenses are designed to allow focusing a little bit past their designed infinity spot in order to account for thermal expansion/contraction and mechanical tolerances.

If the adapter used up ALL of this leeway and causes the lens to be able to barely focus to infinity at room temperature, it's bad.

papillon_65: Were the adapters you tried Meike ones or Neewer? While they appear to be identical in design and probably came out of the same factory, one or the other might have gone through different levels of quality control checking (this seems really common with Chinese factories - see Induro/Benro/Flashpoint/somenonamebrandthatsellstherejectsnoonelsewants). I forget that last brand, but I know from looking at their product line overlaps that Induro, Benro, and some of Adorama's Flashpoint models are all from the same factory/same design. There was some noname vendor 4-5 years ago that was selling what were obviously tripods of the same design/from the same factory - at a significantly lower price with lots of complaints about QC.
 
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OK ... this is going to be quick because I am pushed for time. It fits on the A6000 but there is a tad bit of slop particularly in rotation ... maybe 2-3 degrees. Tamron 16-300 (Canon EOS Mount) fits on adapter snugly. Aperture and Image stabilization appear to work. AutoFocus is a TOTAL failure for short, long and in between. Manual focus works of course but (and this is the BIG gotcha) after taking a shot the lens will sometimes refocus on its own. This action takes place despite the lens being set to manual focus. There may be some tricks in the menu. I will try to post something more extensive later this week.
 
English Documentation:

Neweer NEX Adapter English Documentation (Chinese on reverse side)
Neweer NEX Adapter English Documentation (Chinese on reverse side)

Note the label on the box top:

Even the box label is wrong ....
Even the box label is wrong ....
 
Entropy512 said:
LewToo said:
"... focus past infinity ..."

Infinity focus being defined as the the most distant point to which the lens is supposed to be designed to focus. With a simple lens and a FF 35mm sensor this would be the closest point point between the lens and the sensor where the image circle coincides with the corners of the sensor rectangle. Forgive my ignorance but I would expect most lenses to hit a hard stop at that point.
Click to expand...
Lenses are designed to allow focusing a little bit past their designed infinity spot in order to account for thermal expansion/contraction and mechanical tolerances.

If the adapter used up ALL of this leeway and causes the lens to be able to barely focus to infinity at room temperature, it's bad.

papillon_65: Were the adapters you tried Meike ones or Neewer? While they appear to be identical in design and probably came out of the same factory, one or the other might have gone through different levels of quality control checking (this seems really common with Chinese factories - see Induro/Benro/Flashpoint/somenonamebrandthatsellstherejectsnoonelsewants). I forget that last brand, but I know from looking at their product line overlaps that Induro, Benro, and some of Adorama's Flashpoint models are all from the same factory/same design. There was some noname vendor 4-5 years ago that was selling what were obviously tripods of the same design/from the same factory - at a significantly lower price with lots of complaints about QC.
Click to expand...
Meike and Fotga, as I recall now the Meike one was the worst but both would not focus past infinity.
 
LewToo said:
OK ... this is going to be quick because I am pushed for time. It fits on the A6000 but there is a tad bit of slop particularly in rotation ... maybe 2-3 degrees. Tamron 16-300 (Canon EOS Mount) fits on adapter snugly. Aperture and Image stabilization appear to work. AutoFocus is a TOTAL failure for short, long and in between. Manual focus works of course but (and this is the BIG gotcha) after taking a shot the lens will sometimes refocus on its own. This action takes place despite the lens being set to manual focus. There may be some tricks in the menu. I will try to post something more extensive later this week.
Click to expand...
Can you tell us anything about the USB port? Does it have its own firmware upgrades?

Can it use the updates from the Metabone's website?
 
What about focusing infinity?

LewToo said:
OK ... this is going to be quick because I am pushed for time. It fits on the A6000 but there is a tad bit of slop particularly in rotation ... maybe 2-3 degrees. Tamron 16-300 (Canon EOS Mount) fits on adapter snugly. Aperture and Image stabilization appear to work. AutoFocus is a TOTAL failure for short, long and in between. Manual focus works of course but (and this is the BIG gotcha) after taking a shot the lens will sometimes refocus on its own. This action takes place despite the lens being set to manual focus. There may be some tricks in the menu. I will try to post something more extensive later this week.
Click to expand...
 
Zenza R said:
What about focusing infinity?
Click to expand...
I could focus to the furtherest thing that I could see outside my front door without a problem. That was about 350 feet away (per the subdivision survey). I just took it outside and tried focusing on a light on a lighted building about 1,200 feet away. I could not hand-hold the camera steady enough for 1 second shot but I could focus on the building. When I brought the camera back inside the lens distance mark was at the end of infinity.
 
Last edited:
LewToo said:
Zenza R said:
What about focusing infinity?
Click to expand...
I could focus to the furtherest thing that I could see outside my front door without a problem. That was about 350 feet away (per the subdivision survey). I just took it outside and tried focusing on a light on a lighted building about 1,200 feet away. I could not hand-hold the camera steady enough for 1 second shot but I could focus on the building. When I brought the camera back inside the lens distance mark was at the end of infinity.
Click to expand...
👍🏼
 
This was shot on a tripod with a cable release, manual exposure, F8, ISO 16,000 and the Taron set to 300mm. This is at the "infinity stop". Focus peaking and my eye (the latter not being overly reliable) said the building was "in focus". 100% crop, slanted, noisy as all get out, awful flare, color balance way off, but it is what it is. Approximately 1200-1500 feet

100% crop ....
100% crop ....
 
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I asked where to find firmwares on-line. Here is the e-mail I received from neewer support!!!:

''Hello,
Thanks for your contact, but we don't have firmware available for this item, any problem with it?
Have a good day!
Best regards,Neewer support team''

Yeah, I guess I will sell or return it...



LewToo said:
This was shot on a tripod with a cable release, manual exposure, F8, ISO 16,000 and the Taron set to 300mm. This is at the "infinity stop". Focus peaking and my eye (the latter not being overly reliable) said the building was "in focus". 100% crop, slanted, noisy as all get out, awful flare, color balance way off, but it is what it is. Approximately 1200-1500 feet

100% crop ....
100% crop ....
Click to expand...
 
papillon_65 said:
Entropy512 said:
LewToo said:
"... focus past infinity ..."

Infinity focus being defined as the the most distant point to which the lens is supposed to be designed to focus. With a simple lens and a FF 35mm sensor this would be the closest point point between the lens and the sensor where the image circle coincides with the corners of the sensor rectangle. Forgive my ignorance but I would expect most lenses to hit a hard stop at that point.
Click to expand...
Lenses are designed to allow focusing a little bit past their designed infinity spot in order to account for thermal expansion/contraction and mechanical tolerances.

If the adapter used up ALL of this leeway and causes the lens to be able to barely focus to infinity at room temperature, it's bad.

papillon_65: Were the adapters you tried Meike ones or Neewer? While they appear to be identical in design and probably came out of the same factory, one or the other might have gone through different levels of quality control checking (this seems really common with Chinese factories - see Induro/Benro/Flashpoint/somenonamebrandthatsellstherejectsnoonelsewants). I forget that last brand, but I know from looking at their product line overlaps that Induro, Benro, and some of Adorama's Flashpoint models are all from the same factory/same design. There was some noname vendor 4-5 years ago that was selling what were obviously tripods of the same design/from the same factory - at a significantly lower price with lots of complaints about QC.
Click to expand...
Meike and Fotga, as I recall now the Meike one was the worst but both would not focus past infinity.
Click to expand...
 
Entropy512 said:
papillon_65 said:
Entropy512 said:
LewToo said:
"... focus past infinity ..."

Infinity focus being defined as the the most distant point to which the lens is supposed to be designed to focus. With a simple lens and a FF 35mm sensor this would be the closest point point between the lens and the sensor where the image circle coincides with the corners of the sensor rectangle. Forgive my ignorance but I would expect most lenses to hit a hard stop at that point.
Click to expand...
Lenses are designed to allow focusing a little bit past their designed infinity spot in order to account for thermal expansion/contraction and mechanical tolerances.

If the adapter used up ALL of this leeway and causes the lens to be able to barely focus to infinity at room temperature, it's bad.

papillon_65: Were the adapters you tried Meike ones or Neewer? While they appear to be identical in design and probably came out of the same factory, one or the other might have gone through different levels of quality control checking (this seems really common with Chinese factories - see Induro/Benro/Flashpoint/somenonamebrandthatsellstherejectsnoonelsewants). I forget that last brand, but I know from looking at their product line overlaps that Induro, Benro, and some of Adorama's Flashpoint models are all from the same factory/same design. There was some noname vendor 4-5 years ago that was selling what were obviously tripods of the same design/from the same factory - at a significantly lower price with lots of complaints about QC.
Click to expand...
Meike and Fotga, as I recall now the Meike one was the worst but both would not focus past infinity.
Click to expand...
Click to expand...
 
They are dumb, officially.

papillon_65 said:
Entropy512 said:
papillon_65 said:
Entropy512 said:
LewToo said:
"... focus past infinity ..."

Infinity focus being defined as the the most distant point to which the lens is supposed to be designed to focus. With a simple lens and a FF 35mm sensor this would be the closest point point between the lens and the sensor where the image circle coincides with the corners of the sensor rectangle. Forgive my ignorance but I would expect most lenses to hit a hard stop at that point.
Click to expand...
Lenses are designed to allow focusing a little bit past their designed infinity spot in order to account for thermal expansion/contraction and mechanical tolerances.

If the adapter used up ALL of this leeway and causes the lens to be able to barely focus to infinity at room temperature, it's bad.

papillon_65: Were the adapters you tried Meike ones or Neewer? While they appear to be identical in design and probably came out of the same factory, one or the other might have gone through different levels of quality control checking (this seems really common with Chinese factories - see Induro/Benro/Flashpoint/somenonamebrandthatsellstherejectsnoonelsewants). I forget that last brand, but I know from looking at their product line overlaps that Induro, Benro, and some of Adorama's Flashpoint models are all from the same factory/same design. There was some noname vendor 4-5 years ago that was selling what were obviously tripods of the same design/from the same factory - at a significantly lower price with lots of complaints about QC.
Click to expand...
Meike and Fotga, as I recall now the Meike one was the worst but both would not focus past infinity.

--
667......neighbour of the beast...
http://bit.ly/1K1oqkv
Click to expand...
Wait, there's a FOTGA version of this adapter (with a USB port)?

That's interesting. The previous FOTGA was a junker with a very weak CPU, also very poorly constructed.
Click to expand...
The Fotga didn't have a USB port and that one couldn't enable focusing past infinity either. I should forget the USB ports on these cheaper models, I'm pretty sure they're dumb ports just there for marketing purposes.

--
667......neighbour of the beast...
http://bit.ly/1K1oqkv
Click to expand...
 
papillon_65 said:
The Fotga didn't have a USB port and that one couldn't enable focusing past infinity either. I should forget the USB ports on these cheaper models, I'm pretty sure they're dumb ports just there for marketing purposes.
Click to expand...
 
Consider how good the website of Deo Saker Falcon is. I asked them for firmware, they replied ''We are up to date'' Weeks after the release of v2.0 firmware...

Neewer does not even have a product page online. And when I asked about firmware, they said: we don't have firmware available for this item, any problem with it?'

I've no hope. :)

Entropy512 said:
Entropy512 said:
The Fotga didn't have a USB port and that one couldn't enable focusing past infinity either. I should forget the USB ports on these cheaper models, I'm pretty sure they're dumb ports just there for marketing purposes.

--
667......neighbour of the beast...
http://bit.ly/1K1oqkv
Click to expand...
It's not entirely dumb, there's SOMETHING connected there:

adodd@quadmonkey:/media/extradisk/adodd/z3$ dmesg

[3052028.524056] hub 2-1.5.4:1.0: Cannot enable port 2. Maybe the USB cable is bad?

[3052029.355265] hub 2-1.5.4:1.0: Cannot enable port 2. Maybe the USB cable is bad?

[3052030.186539] hub 2-1.5.4:1.0: Cannot enable port 2. Maybe the USB cable is bad?

[3052031.017690] hub 2-1.5.4:1.0: Cannot enable port 2. Maybe the USB cable is bad?

[3052031.018088] hub 2-1.5.4:1.0: unable to enumerate USB device on port 2

So there's SOMETHING connected. It may be designed such that it isn't powered via the USB port, this was with the device not connected to a camera.

Hmm... Same results when connected to a camera with no lens. I won't be able to test with a lens until much later tonight.
Click to expand...
 
LewToo said:
OK ... this is going to be quick because I am pushed for time. It fits on the A6000 but there is a tad bit of slop particularly in rotation ... maybe 2-3 degrees. Tamron 16-300 (Canon EOS Mount) fits on adapter snugly. Aperture and Image stabilization appear to work. AutoFocus is a TOTAL failure for short, long and in between. Manual focus works of course but (and this is the BIG gotcha) after taking a shot the lens will sometimes refocus on its own. This action takes place despite the lens being set to manual focus. There may be some tricks in the menu. I will try to post something more extensive later this week.
Click to expand...
Whats the point of testing this on an a6000? Fast Af only works on a7rii and fw updates a7ii. Testing it on any other camera is pointless.
 
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