Cleaning lens element's in Minolta MC Rokkor-PF 1:1.4 f=58mm
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- Опубликовано: 15 окт 2024
- Some of the lens element's in this Cleaning lens element's in Minolta MC Rokkor-PF 1:1.4 f=58mm, had some mild haze, and there was some light scratches in the front lens element that I could not do anything with, but I was happy with the result.
I both try to clean with "Eclipse" and Lighter Fluid, but I think I got the best result with Lighter Fluid.
Brilliant video, some really usefull information, and home made tools.
Am i crazy? did you forget to put back the spacer for the front group?
in any case, I'm super grateful with all the thing I've learned from you, I know the video is many years old but find it odd enough to post a comment.
Best luck!
I love watching your vids, very handy as I have Takumars, and Minolta lenses. Thank You!
Thank you for spending your time showing us the effort it take to clean optics. I never tried lighter fluid, I was concern it’s something and could release the soft coating of Minolta rokkor’s I’ve read that Minolta used a coating they consider soft. So if using lighter fluid looks safe, you just helped me out! I’m interested where you came up with that micro tip applicator for the fluid dispenser. Anyways any thanks for the splendid video you have give all of us!
Thanks Duane, there are maybe diffrent qualitys of Lighter Fluid but I think the "ZIPPO" and a brand called "EXTRA+" is really good, because the is no trace of oil film. This is just my own experience during cleaning many, many lenses! and it's not destructive cleaning, of course it's always a challence when working with a "soft coating" lenses, like older Zeiss or maybe, as someone out there mention that older Minolta could have a "softer" coating.
But, again, when cleaning lens elements one have to only put a very light pressure on the lens wipe, and ALWAYS a few drops of solvent on the lens wipe!
The "micro tip applicator" is just a syringe needle 0,8mm, that I buy on the Apotek, I cut away the plastic thread then cut the sharp needle end and file it so there is no sharp edge.
I hope it makes sense :-)
@@mikeno62 great success! The zippo (same can you’re using) and same cleaning tissues did a remarkable restoration. The trick of rotating the retainer ring till it clicks is dead on. I too struggled with dust… but it’s so minor. I’ll try to see if I can solve that issue too.
Never thought of those rubber rings I have the thick one the black rubber I’m going to get after I get a bit more into this. I have plenty of lenses I have that need a restoration.
So feel good! You taught me well.. I’ll continue watch to grasp more lessons. Btw it too about 35 minutes working on my konica 85mm f1.7. Thank you!
MASSIVE THANKS Mike!!!! Great Videos!!
Hey Kenneth, another brilliant video. Thank you ever so much. I know these videos on this lens are about 3 years ago, but I also saw the one where you cleaned and re-greased the focusing helicoid elements and an idea occurred to me and I was interested to know your thoughts on this. It never ceases to amaze me how tiny dust particles manage to get not just inside a lens body, but also even inside the lens groups. I’m sure manufacturers would do this if it were really this simple, but what do you think about putting a tiny amount of some compound on the threads of the spacer rings that separate the lenses inside a group, to try to seal the threads from dust getting past in future? The idea occurred to me while thinking about the grease on the helicoid threads, but I imagine that grease could be problematic if you got even the tiniest amount too much squeezing out, or smudging a lens by accident - but, in principle, it could create an airtight seal on the threads so the spacer could still be removed again in future. Locktite would be a bad idea (for obvious reasons) but what’s your thoughts on whether this could be worth trying (say on just a cheap, old lens) and if so whether to try the same grease for the focus assembly or if you had any better ideas? Apologies for the long description. Very interested to hear your thoughts. Thanks, Steve 🤔
Sometimes using a compound can off gas from breakdown of age or heat and get trapped in the lens sand witch and could etch the optics. That’s why the do not use a sealant. But you are very correct it’s problematic to lens groups.
Hello there Mr Kenneth 👋🏻👋🏻 thanks for making all these awesome videos! I have a question at the end, if you care for some context then please read on:
I had an issue with a lens of this same model a few years back. Opened it up to regrease it (it was locked incredibly hard), did that and it went fine. The thing is, I noticed a couple blots on the rear side of the front element and decided to clean it up. Didnt work, so I tried with a cotton swab and isopropyl alcohol. Something felt off immediately, it was as if suddenly there was glue on the lens. When it dried (like 5 seconds later) the lens was all scratched. I assume there's a coating and the isopropyl messed it up, this was the first time I attempted anything of the sort and lets say I never took isopropyl near a lens ener again.
How would you recommend I go about fixing this? Is it really the coating that got messed up or do you think it might be some sort of residue from the cotton swab? The scratches are very _very_ light, But they cover pretty much all of the glass surface.
Hello.
How do you think, if lens edges blackening might be beneficial in terms of contrast?
👏👏👏👏👏👏👏👏👏👏👍
Good job. Thanks
Good video! I have a question: is the lighter fluid save for lens coating?
Yes, the lighter fluid is safe for the coating, what could make some damage to the coating is actually the lens tissue if it's used dry, so, always use the lens cleaning tissue wet when cleaning lens element's.
Booom !!! Goood !!!
buf, some of this rings are very hard to unscrew...
Great video! Still hoping you will do a disassembly of a 180mm AF Nikkor. I have one which the AF sounds weird, and the aperture blades has oil/fungus on them, see here: ruclips.net/video/F-__Rx-15Ck/видео.html
Would you clean my lens if I sent it to you?
Sorry, but no.
mikeno62 🙁