What about the 60mm 2.8g can you do a video. I found a service manual but it says if i remove the front element alligment will be needed and i cant find how to do that my fungus is behind first element group
yes, alignment is needed. Anyway, you can do an alignment using a known target (and picture) and you lose the screws just enough so you can push the group and take a series of images until you're satisfied, it takes time but it works. Construction is probably similar to the 105mm f/2.8G that I open here th-cam.com/video/uEOQOt1uRzM/w-d-xo.html
I don't think so because all AF lenses do not have that information. in my understanding, the AF sensor looks for contrast differences and moves the motor until contrast is maximized (how it knows the direction I cannot tell), but if you point with a single AF point at a low contrast target the lens most probably will "hunt" for a target.
@@diyextravaganza interesting.. I know a lot about lenses but very little about how auto focus works. I’ll repair old manual lenses, but stay away from anything with motors or too many electronics
@@Just-a-bystander I don't like too many electronics either, AF generally works as I previously mentioned (in open loop), more elaborate lenses have a sort of bar code that provides position information, but now that i come to think about it, some lenses do use that information for the AF. In this video I realign the encoder of the lens. th-cam.com/video/Uvl_e_fEpks/w-d-xo.html
Hello, "D" has nothing to do with auto-focus, like said in the video, it helps with flash and only when the subject is a lot in contrast with the back. Most of photographers are using manual mode flash, especially with Macro. Marketing, Marketing ...
I'm aware of that and use gloves when the job is critical (like handling a prism). I don't use them each time because it is very unecological to throw away gloves everytime.
Awesome video! Just watched it to clean up my 60mm! Subbed!
@@Mr50mmish welcome to the channel, do not hesitate to share with friends and to ask anytime if you have a doubt. Best.
Thank you, this seems doable! I'm going to get the tools and try it! The other disassembly videos I found had my head spinning, so I'm very grateful
Excellent, I'm very glad that my video is helpful for you !
Hello,
the videos are very helpful, thank you. I could repair two of my favourite lenses.
Regards from germany.
Great to hear that Frank ! Don't forget to tell all your friends about the channel. Cheers.
Excellent video, thank you for posting.
Thanks to you !
What about the 60mm 2.8g can you do a video. I found a service manual but it says if i remove the front element alligment will be needed and i cant find how to do that my fungus is behind first element group
yes, alignment is needed. Anyway, you can do an alignment using a known target (and picture) and you lose the screws just enough so you can push the group and take a series of images until you're satisfied, it takes time but it works. Construction is probably similar to the 105mm f/2.8G that I open here th-cam.com/video/uEOQOt1uRzM/w-d-xo.html
Thought the distance info was also useful for autofocus mode. Not sure on that.
I don't think so because all AF lenses do not have that information. in my understanding, the AF sensor looks for contrast differences and moves the motor until contrast is maximized (how it knows the direction I cannot tell), but if you point with a single AF point at a low contrast target the lens most probably will "hunt" for a target.
@@diyextravaganza interesting.. I know a lot about lenses but very little about how auto focus works. I’ll repair old manual lenses, but stay away from anything with motors or too many electronics
@@Just-a-bystander I don't like too many electronics either, AF generally works as I previously mentioned (in open loop), more elaborate lenses have a sort of bar code that provides position information, but now that i come to think about it, some lenses do use that information for the AF. In this video I realign the encoder of the lens. th-cam.com/video/Uvl_e_fEpks/w-d-xo.html
Hello,
"D" has nothing to do with auto-focus, like said in the video, it helps with flash and only when the subject is a lot in contrast with the back. Most of photographers are using manual mode flash, especially with Macro. Marketing, Marketing ...
Not to be a stickler, but why don’t you use gloves? Skin has oils, which you don’t want on the lenses.
I'm aware of that and use gloves when the job is critical (like handling a prism). I don't use them each time because it is very unecological to throw away gloves everytime.