Fred Miranda wrote: hmzimelka wrote: Fred Miranda wrote: hmzimelka wrote:
My two APO 50/3.5 arrived today.
Type I Black and Type II Silver.
Lovely lenses but again quality control issues strike again... both copies have a front focus.
The Type II silver lens has a nice sizeable piece of lint inside what looks to be in the middle of the lenses possibly in near the aperture assembly.
I'm now thoroughly fed up with 3 poor samples of Voigtlander lenses in a row. My rangefinder is accurate. My Zeiss Planar, Summicron-m 50mm V, Nokton 75/1.5, Ultron 28mm ASPH II, Tele-Elmarit 90mm, Skopar 35mm, Skopar 21mm are all accurate.
It would seem that both lenses are not cam'd on the ring that moves the rangefinder focus. Unlike both my Zeiss and Summicron that are slightly cut to adapt the lens focal length to the rangefinder focal length.
The reason I looked if the ring has a cam is because infinity focus matches my camera's rangefinder, but at anything closer than infinity the rangefinder starts progressively front focusing. All my 50mm and longer lenses have an angled or a cam ring and track focus properly throughout the focus range.
That looks quite troubling. Is it possible to exchange the lens?
I just checked my three copies for dust in the elements and alignment with the rangefinder. Like the chrome pre-production version, the other two copies are also perfectly aligned at 0.7m, 2m, and 5m. Their infinity hard stops are identical, which I used to compare their resolution performance.
Regarding dust or lint, I didn’t find any particles in any of the three lenses. It seems you might have had some bad luck. I hope you can arrange an exchange. If not, try removing the rear core to see if you can clean the dust. @yukosteel@@@'s advice might be helpful here.
Regarding the lint, I don't think that would be a difficult fix. But that is the least of my concern. The front focus issue make the lenses practically useless on the M11. Removing a shim won't fix the issue since that influences the focus issue equally over the entire range, and therefor will create a back focus problem when it comes to infinity subjects.
Noticing front-focus in an f/3.5 lens indicates it is severely misaligned. If your lens is indeed front-focusing, removing a mount shim, or in other words, decreasing the distance between the lens and the sensor, will correct the issue. However, as you mentioned, this adjustment could alter the lens alignment at long distances. In some cases, this can be the right fix if Cosina didn't use the correct size shims, and tweaking it resolves everything from close focus to infinity.
Most recent Cosina lenses don't include shims in the mount. Instead, they usually have "rangefinder adjustment" shims, which are smaller and require more disassembly but are often accessible. For example, the Voigtlander 28mm f/1.5 Nokton has such shims that can be accessed without even removing the lens mount.
The Type II looks very easy to get into. I'll do that if Robert White can't find a solution for me.
I'm not sure how to manage my expectations anymore with Voigtlander, but yet again it showed me just how good my Summicron-M 50mm V is.
Here is a [url]=https://mega.nz/folder/uqYDQaJI#ZlKfCldMWIAwKat6BUhZww[/url] to some DNG files shot at f/4 under near mid day sun.
I'm not seeing how this APO is any better for landscapes or anything else for that matter than my Summicron 50mm, with exception for a little less CA and no focus shift at equivalent apertures.
The Apo-Lanthar 50mm f/3.5 has an interesting colour and contrast in the greater central area. Very clean and bright. But other than that it's not some magic bullet that would stop me from taking my Summicron instead.
Sep 13, 2024 at 05:03 AM
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Fred Miranda wrote: hmzimelka wrote: Fred Miranda wrote: hmzimelka wrote:
My two APO 50/3.5 arrived today.
Type I Black and Type II Silver.
Lovely lenses but again quality control issues strike again... both copies have a front focus.
The Type II silver lens has a nice sizeable piece of lint inside what looks to be in the middle of the lenses possibly in near the aperture assembly.
I'm now thoroughly fed up with 3 poor samples of Voigtlander lenses in a row. My rangefinder is accurate. My Zeiss Planar, Summicron-m 50mm V, Nokton 75/1.5, Ultron 28mm ASPH II, Tele-Elmarit 90mm, Skopar 35mm, Skopar 21mm are all accurate.
It would seem that both lenses are not cam'd on the ring that moves the rangefinder focus. Unlike both my Zeiss and Summicron that are slightly cut to adapt the lens focal length to the rangefinder focal length.
The reason I looked if the ring has a cam is because infinity focus matches my camera's rangefinder, but at anything closer than infinity the rangefinder starts progressively front focusing. All my 50mm and longer lenses have an angled or a cam ring and track focus properly throughout the focus range.
That looks quite troubling. Is it possible to exchange the lens?
I just checked my three copies for dust in the elements and alignment with the rangefinder. Like the chrome pre-production version, the other two copies are also perfectly aligned at 0.7m, 2m, and 5m. Their infinity hard stops are identical, which I used to compare their resolution performance.
Regarding dust or lint, I didn’t find any particles in any of the three lenses. It seems you might have had some bad luck. I hope you can arrange an exchange. If not, try removing the rear core to see if you can clean the dust. @yukosteel@@@'s advice might be helpful here.
Regarding the lint, I don't think that would be a difficult fix. But that is the least of my concern. The front focus issue make the lenses practically useless on the M11. Removing a shim won't fix the issue since that influences the focus issue equally over the entire range, and therefor will create a back focus problem when it comes to infinity subjects.
Noticing front-focus in an f/3.5 lens indicates it is severely misaligned. If your lens is indeed front-focusing, removing a mount shim, or in other words, decreasing the distance between the lens and the sensor, will correct the issue. However, as you mentioned, this adjustment could alter the lens alignment at long distances. In some cases, this can be the right fix if Cosina didn't use the correct size shims, and tweaking it resolves everything from close focus to infinity.
Most recent Cosina lenses don't include shims in the mount. Instead, they usually have "rangefinder adjustment" shims, which are smaller and require more disassembly but are often accessible. For example, the Voigtlander 28mm f/1.5 Nokton has such shims that can be accessed without even removing the lens mount.
The Type II looks very easy to get into. I'll do that if Robert White can't find a solution for me.
I'm not sure how to manage my expectations anymore with Voigtlander, but yet again it showed me just how good my Summicron-M 50mm V is.
Here is a [url=]https://mega.nz/folder/uqYDQaJI#ZlKfCldMWIAwKat6BUhZww[/url] to some DNG files shot at f/4 under near mid day sun.
I'm not seeing how this APO is any better for landscapes or anything else for that matter than my Summicron 50mm, with exception for a little less CA and no focus shift at equivalent apertures.
The Apo-Lanthar 50mm f/3.5 has an interesting colour and contrast in the greater central area. Very clean and bright. But other than that it's not some magic bullet that would stop me from taking my Summicron instead.
Sep 13, 2024 at 05:02 AM
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Fred Miranda wrote: hmzimelka wrote: Fred Miranda wrote: hmzimelka wrote:
My two APO 50/3.5 arrived today.
Type I Black and Type II Silver.
Lovely lenses but again quality control issues strike again... both copies have a front focus.
The Type II silver lens has a nice sizeable piece of lint inside what looks to be in the middle of the lenses possibly in near the aperture assembly.
I'm now thoroughly fed up with 3 poor samples of Voigtlander lenses in a row. My rangefinder is accurate. My Zeiss Planar, Summicron-m 50mm V, Nokton 75/1.5, Ultron 28mm ASPH II, Tele-Elmarit 90mm, Skopar 35mm, Skopar 21mm are all accurate.
It would seem that both lenses are not cam'd on the ring that moves the rangefinder focus. Unlike both my Zeiss and Summicron that are slightly cut to adapt the lens focal length to the rangefinder focal length.
The reason I looked if the ring has a cam is because infinity focus matches my camera's rangefinder, but at anything closer than infinity the rangefinder starts progressively front focusing. All my 50mm and longer lenses have an angled or a cam ring and track focus properly throughout the focus range.
That looks quite troubling. Is it possible to exchange the lens?
I just checked my three copies for dust in the elements and alignment with the rangefinder. Like the chrome pre-production version, the other two copies are also perfectly aligned at 0.7m, 2m, and 5m. Their infinity hard stops are identical, which I used to compare their resolution performance.
Regarding dust or lint, I didn’t find any particles in any of the three lenses. It seems you might have had some bad luck. I hope you can arrange an exchange. If not, try removing the rear core to see if you can clean the dust. @yukosteel@@@'s advice might be helpful here.
Regarding the lint, I don't think that would be a difficult fix. But that is the least of my concern. The front focus issue make the lenses practically useless on the M11. Removing a shim won't fix the issue since that influences the focus issue equally over the entire range, and therefor will create a back focus problem when it comes to infinity subjects.
Noticing front-focus in an f/3.5 lens indicates it is severely misaligned. If your lens is indeed front-focusing, removing a mount shim, or in other words, decreasing the distance between the lens and the sensor, will correct the issue. However, as you mentioned, this adjustment could alter the lens alignment at long distances. In some cases, this can be the right fix if Cosina didn't use the correct size shims, and tweaking it resolves everything from close focus to infinity.
Most recent Cosina lenses don't include shims in the mount. Instead, they usually have "rangefinder adjustment" shims, which are smaller and require more disassembly but are often accessible. For example, the Voigtlander 28mm f/1.5 Nokton has such shims that can be accessed without even removing the lens mount.
The Type II looks very easy to get into. I'll do that if Robert White can't find a solution for me.
I'm not sure how to manage my expectations anymore with Voigtlander, but yet again it showed me just how good my Summicron-M 50mm V is.
Here is a [url=https://mega.nz/folder/uqYDQaJI#ZlKfCldMWIAwKat6BUhZww[/url] to some DNG files shot at f/4 under near mid day sun.
I'm not seeing how this APO is any better for landscapes or anything else for that matter than my Summicron 50mm, with exception for a little less CA and no focus shift at equivalent apertures.
The Apo-Lanthar 50mm f/3.5 has an interesting colour and contrast in the greater central area. Very clean and bright. But other than that it's not some magic bullet that would stop me from taking my Summicron instead.
Sep 13, 2024 at 05:02 AM
Notice: Undefined offset: 0 in /var/www/vhosts/fredmiranda.com/httpdocs/forum/viewedits.php on line 155
Fred Miranda wrote: hmzimelka wrote: Fred Miranda wrote: hmzimelka wrote:
My two APO 50/3.5 arrived today.
Type I Black and Type II Silver.
Lovely lenses but again quality control issues strike again... both copies have a front focus.
The Type II silver lens has a nice sizeable piece of lint inside what looks to be in the middle of the lenses possibly in near the aperture assembly.
I'm now thoroughly fed up with 3 poor samples of Voigtlander lenses in a row. My rangefinder is accurate. My Zeiss Planar, Summicron-m 50mm V, Nokton 75/1.5, Ultron 28mm ASPH II, Tele-Elmarit 90mm, Skopar 35mm, Skopar 21mm are all accurate.
It would seem that both lenses are not cam'd on the ring that moves the rangefinder focus. Unlike both my Zeiss and Summicron that are slightly cut to adapt the lens focal length to the rangefinder focal length.
The reason I looked if the ring has a cam is because infinity focus matches my camera's rangefinder, but at anything closer than infinity the rangefinder starts progressively front focusing. All my 50mm and longer lenses have an angled or a cam ring and track focus properly throughout the focus range.
That looks quite troubling. Is it possible to exchange the lens?
I just checked my three copies for dust in the elements and alignment with the rangefinder. Like the chrome pre-production version, the other two copies are also perfectly aligned at 0.7m, 2m, and 5m. Their infinity hard stops are identical, which I used to compare their resolution performance.
Regarding dust or lint, I didn’t find any particles in any of the three lenses. It seems you might have had some bad luck. I hope you can arrange an exchange. If not, try removing the rear core to see if you can clean the dust. @yukosteel@@@'s advice might be helpful here.
Regarding the lint, I don't think that would be a difficult fix. But that is the least of my concern. The front focus issue make the lenses practically useless on the M11. Removing a shim won't fix the issue since that influences the focus issue equally over the entire range, and therefor will create a back focus problem when it comes to infinity subjects.
Noticing front-focus in an f/3.5 lens indicates it is severely misaligned. If your lens is indeed front-focusing, removing a mount shim, or in other words, decreasing the distance between the lens and the sensor, will correct the issue. However, as you mentioned, this adjustment could alter the lens alignment at long distances. In some cases, this can be the right fix if Cosina didn't use the correct size shims, and tweaking it resolves everything from close focus to infinity.
Most recent Cosina lenses don't include shims in the mount. Instead, they usually have "rangefinder adjustment" shims, which are smaller and require more disassembly but are often accessible. For example, the Voigtlander 28mm f/1.5 Nokton has such shims that can be accessed without even removing the lens mount.
The Type II looks very easy to get into. I'll do that if Robert White can't find a solution for me.
I'm not sure how to manage my expectations anymore with Voigtlander, but yet again it showed me just how good my Summicron-M 50mm V is.
Here is a LINK to some DNG files shot at f/4 under near mid day sun.
I'm not seeing how this APO is any better for landscapes or anything else for that matter than my Summicron 50mm, with exception for a little less CA and no focus shift at equivalent apertures.
The Apo-Lanthar 50mm f/3.5 has an interesting colour and contrast in the greater central area. Very clean and bright. But other than that it's not some magic bullet that would stop me from taking my Summicron instead.
Sep 08, 2024 at 08:04 AM
Notice: Undefined offset: 0 in /var/www/vhosts/fredmiranda.com/httpdocs/forum/viewedits.php on line 155
Fred Miranda wrote: hmzimelka wrote: Fred Miranda wrote: hmzimelka wrote:
My two APO 50/3.5 arrived today.
Type I Black and Type II Silver.
Lovely lenses but again quality control issues strike again... both copies have a front focus.
The Type II silver lens has a nice sizeable piece of lint inside what looks to be in the middle of the lenses possibly in near the aperture assembly.
I'm now thoroughly fed up with 3 poor samples of Voigtlander lenses in a row. My rangefinder is accurate. My Zeiss Planar, Summicron-m 50mm V, Nokton 75/1.5, Ultron 28mm ASPH II, Tele-Elmarit 90mm, Skopar 35mm, Skopar 21mm are all accurate.
It would seem that both lenses are not cam'd on the ring that moves the rangefinder focus. Unlike both my Zeiss and Summicron that are slightly cut to adapt the lens focal length to the rangefinder focal length.
The reason I looked if the ring has a cam is because infinity focus matches my camera's rangefinder, but at anything closer than infinity the rangefinder starts progressively front focusing. All my 50mm and longer lenses have an angled or a cam ring and track focus properly throughout the focus range.
That looks quite troubling. Is it possible to exchange the lens?
I just checked my three copies for dust in the elements and alignment with the rangefinder. Like the chrome pre-production version, the other two copies are also perfectly aligned at 0.7m, 2m, and 5m. Their infinity hard stops are identical, which I used to compare their resolution performance.
Regarding dust or lint, I didn’t find any particles in any of the three lenses. It seems you might have had some bad luck. I hope you can arrange an exchange. If not, try removing the rear core to see if you can clean the dust. @yukosteel@@@'s advice might be helpful here.
Regarding the lint, I don't think that would be a difficult fix. But that is the least of my concern. The front focus issue make the lenses practically useless on the M11. Removing a shim won't fix the issue since that influences the focus issue equally over the entire range, and therefor will create a back focus problem when it comes to infinity subjects.
Noticing front-focus in an f/3.5 lens indicates it is severely misaligned. If your lens is indeed front-focusing, removing a mount shim, or in other words, decreasing the distance between the lens and the sensor, will correct the issue. However, as you mentioned, this adjustment could alter the lens alignment at long distances. In some cases, this can be the right fix if Cosina didn't use the correct size shims, and tweaking it resolves everything from close focus to infinity.
Most recent Cosina lenses don't include shims in the mount. Instead, they usually have "rangefinder adjustment" shims, which are smaller and require more disassembly but are often accessible. For example, the Voigtlander 28mm f/1.5 Nokton has such shims that can be accessed without even removing the lens mount.
The Type II looks very easy to get into. I'll do that if Robert White can't find a solution for me.
I'm not sure how to manage my expectations anymore with Voigtlander, but yet again it showed me just how good my Summicron-M 50mm V is.
Here is a LINK to some DNG files shot at f/4 under near mid day sun.
I'm not seeing how this APO is any better for landscapes or anything else for that matter than my Summicron 50mm, with exception for a little less CA and no focus shift at equivalent apertures.
The Apo-Lanthar 50mm f//3.5 has an interesting colour and contrast in the greater central area. Very clean and bright. But other than that it's not some magic bullet that would stop me from taking my Summicron instead.
Sep 08, 2024 at 08:03 AM
Notice: Undefined offset: 0 in /var/www/vhosts/fredmiranda.com/httpdocs/forum/viewedits.php on line 155
Fred Miranda wrote: hmzimelka wrote: Fred Miranda wrote: hmzimelka wrote:
My two APO 50/3.5 arrived today.
Type I Black and Type II Silver.
Lovely lenses but again quality control issues strike again... both copies have a front focus.
The Type II silver lens has a nice sizeable piece of lint inside what looks to be in the middle of the lenses possibly in near the aperture assembly.
I'm now thoroughly fed up with 3 poor samples of Voigtlander lenses in a row. My rangefinder is accurate. My Zeiss Planar, Summicron-m 50mm V, Nokton 75/1.5, Ultron 28mm ASPH II, Tele-Elmarit 90mm, Skopar 35mm, Skopar 21mm are all accurate.
It would seem that both lenses are not cam'd on the ring that moves the rangefinder focus. Unlike both my Zeiss and Summicron that are slightly cut to adapt the lens focal length to the rangefinder focal length.
The reason I looked if the ring has a cam is because infinity focus matches my camera's rangefinder, but at anything closer than infinity the rangefinder starts progressively front focusing. All my 50mm and longer lenses have an angled or a cam ring and track focus properly throughout the focus range.
That looks quite troubling. Is it possible to exchange the lens?
I just checked my three copies for dust in the elements and alignment with the rangefinder. Like the chrome pre-production version, the other two copies are also perfectly aligned at 0.7m, 2m, and 5m. Their infinity hard stops are identical, which I used to compare their resolution performance.
Regarding dust or lint, I didn’t find any particles in any of the three lenses. It seems you might have had some bad luck. I hope you can arrange an exchange. If not, try removing the rear core to see if you can clean the dust. @yukosteel@@@'s advice might be helpful here.
Regarding the lint, I don't think that would be a difficult fix. But that is the least of my concern. The front focus issue make the lenses practically useless on the M11. Removing a shim won't fix the issue since that influences the focus issue equally over the entire range, and therefor will create a back focus problem when it comes to infinity subjects.
Noticing front-focus in an f/3.5 lens indicates it is severely misaligned. If your lens is indeed front-focusing, removing a mount shim, or in other words, decreasing the distance between the lens and the sensor, will correct the issue. However, as you mentioned, this adjustment could alter the lens alignment at long distances. In some cases, this can be the right fix if Cosina didn't use the correct size shims, and tweaking it resolves everything from close focus to infinity.
Most recent Cosina lenses don't include shims in the mount. Instead, they usually have "rangefinder adjustment" shims, which are smaller and require more disassembly but are often accessible. For example, the Voigtlander 28mm f/1.5 Nokton has such shims that can be accessed without even removing the lens mount.
The Type II looks very easy to get into. I'll do that if Robert White can't find a solution for me.
I'm not sure how to manage my expectations anymore with Voigtlander, but yet again it showed me just how good my Summicron-M 50mm V is.
Here is a LINK to two DNG files shot at f/4 under near mid day sun.
I'm not seeing how this APO is any better for landscapes or anything else for that matter than my Summicron 50mm, with exception for a little less CA and no focus shift at equivalent apertures.
The Apo-Lanthar 50mm f//3.5 has an interesting colour and contrast in the greater central area. Very clean and bright. But other than that it's not some magic bullet that would stop me from taking my Summicron instead.
