Awesome video, I traded lenses with someone via internet, when i got it the lens was full of fungus which the guy hadn't told me about. So with the help of this video I was able to take it apart and clean the elements! Thanks!!!
One of the best lenses Minolta ever made. I recently acquired one, and since it might have the beginnings of some fungus within this video is a great resource!
Really Great DIY video. I wonder if the AF version is similarly constructed inside. If not, I would love to see the Auto Focus version (Minolta AF 50mm f/1.4) disassembled. I've got one with some haze inside.
I have this kind of lens, there are fungus inside the front elements, but the front elements are in a sealed unit, there is no way I can cleaned them.Unlike the Takumar 50 1.4, all the elements can be dismantle, very easy to clean.
Is disassembly of this lens very similar to the Minolta MC Rokkor PG 50mm f1.4? Are there any differences to be aware of in disassembly and reassembly? Thanks
To my knowledge at least - and using a normal set of tools - no, this piece cannot be taken apart. The optics are sealed in a plastic housing so you can only clean the front and back surfaces. This is a common drawback of the later MD lenses. If there is just minor internal dust, don't worry about it. If there is fungus or something more major, I don't think it can be repaired but the lens may still work well enough in most normal shooting conditions.
My lens is the MD Rokkor 50mm f1.4 and is slightly different under the name plate... There isnt 2 screws but the 3 that hold the front element are partly covered by a flange. Should the section just screw off by hand like yours after you remove the 2 screws?
Hi Matt, thanks for these very informative videos. I recently bought a job lot of Minolta lenses and the MD Rokkor 50mm f1.4 has fungus/haze on the front element. Now based on your video I think I can open it and take that section out no problem but what do you recommend for cleaning and removing the fungus? Regards Phil
Matt Bierner Ive been told to use this.. www.ponds.com/product/detail/95877/cold-cream-cleanser-makeup-remover The advice... Ponds cream is a very mild cleanser with antifungul properties, you clean the lens by putting it on , leave it 30mins, and the wash of with cold water, then clean with alcohol.
Hi Matt thank you for this video. If I was to take apart my Minolta MD 50 mm f 1.2 lens and clean the aperture blades from excess oil; what liquid would you recommend me cleaning the blades dipped in a bowl and how long? Should I use rubbing alcohol, acetone, or something else? Thanks. -Daniel.
That shouldn't be much of a problem. When less pure isopropyl alcohol drys, it may leave a small amount of residue behind (from the water, not the oil). This should not damage the blades but it is something you can notice when inspecting a lens. To minimize this, try gently dabbing off the blades while they are drying or using a hand air pump to blow the isopropyl alcohol off before it dries
A bulb blower works well. Compressed air usually overkill and canned air may leave more residue on the blades. Using your mouth is not great since you can end up blowing moisture onto the blades.
I took my copy apart to de-click it, but now when I set the aperture to wide open at f1.4, it slowly closes down to f2. Anybody know how I can fix this? Very helpful vid btw.
God save TH-cam and people who create such a great content.
Awesome video, I traded lenses with someone via internet, when i got it the lens was full of fungus which the guy hadn't told me about. So with the help of this video I was able to take it apart and clean the elements! Thanks!!!
One of the best lenses Minolta ever made. I recently acquired one, and since it might have the beginnings of some fungus within this video is a great resource!
Thank you! I just finished removing fungus from the rear element. The video was very helpful.
Thank you for a wonderful video. at 6:04 you mention the ball bearing - would would I find one? And what size would it be?
you save my life!!! thank you very much!! greatings from México! :D
Really Great DIY video. I wonder if the AF version is similarly constructed inside. If not, I would love to see the Auto Focus version (Minolta AF 50mm f/1.4) disassembled. I've got one with some haze inside.
Hi Matt, this was for great help! I don't know hot to screw off the frontal lens and this save me (save my lens for some crash).
Thank you!
I bought a broken lens just to practice repairing lenses.
The little piece at 6:10 was alread missing. How can I replace it?
I have this kind of lens, there are fungus inside the front elements, but the front elements are in a sealed unit, there is no way I can cleaned them.Unlike the Takumar 50 1.4, all the elements can be dismantle, very easy to clean.
Amazing video!
Is disassembly of this lens very similar to the Minolta MC Rokkor PG 50mm f1.4? Are there any differences to be aware of in disassembly and reassembly? Thanks
Hi Matt, Is the part at 2:44 not possible to be cleaned? I have one it was left from my grandpa, I really want it fixed. Thanks
To my knowledge at least - and using a normal set of tools - no, this piece cannot be taken apart. The optics are sealed in a plastic housing so you can only clean the front and back surfaces. This is a common drawback of the later MD lenses.
If there is just minor internal dust, don't worry about it. If there is fungus or something more major, I don't think it can be repaired but the lens may still work well enough in most normal shooting conditions.
It is filled with fungus, I guess it can't be used anyway thank you for answering. :)
My lens is the MD Rokkor 50mm f1.4 and is slightly different under the name plate... There isnt 2 screws but the 3 that hold the front element are partly covered by a flange. Should the section just screw off by hand like yours after you remove the 2 screws?
Ah, when I let the focus throw the front forward theres a tiny screw in the side...
@@gizto2t9 I had the same issue.
thanks a lot !!!
You're awesome! Thank You so much for this video!!!
hey I got some problem, Im trying to fix the aperture bar thing, it snapped off accidentally, I was wondering how I could get it back there. Thanks!
Hi Matt, thanks for these very informative videos. I recently bought a job lot of Minolta lenses and the MD Rokkor 50mm f1.4 has fungus/haze on the front element. Now based on your video I think I can open it and take that section out no problem but what do you recommend for cleaning and removing the fungus?
Regards Phil
Hydrogen peroxide works well to remove the fungus itself and is usually safe on the glass. I would test it on an edge area first though.
Matt Bierner Ive been told to use this..
www.ponds.com/product/detail/95877/cold-cream-cleanser-makeup-remover
The advice...
Ponds cream is a very mild cleanser with antifungul properties, you clean the lens by putting it on , leave it 30mins, and the wash of with cold water, then clean with alcohol.
Great video! Do you happen to know the size of the ball bearing on this lens? I lost mine reassembling :(
i lost mine too, did you have any success finding one?
@@marekregelt6193 I was taking mine apart and the bearing popped of and stuck to my hand. I'd say it has the same circumference as the screws.
@@jekanyika i actually found it inside the lens
Hi Matt thank you for this video. If I was to take apart my Minolta MD 50 mm f 1.2 lens and clean the aperture blades from excess oil; what liquid would you recommend me cleaning the blades dipped in a bowl and how long? Should I use rubbing alcohol, acetone, or something else? Thanks.
-Daniel.
I use 99.9% pure isopropyl alcohol. It removes the oil pretty well and also does not leave residue after evaporating.
Matt Bierner oh thanks. I just bought 91% isopropyl alcohol at target hope the percentage is not much of a big difference.
That shouldn't be much of a problem. When less pure isopropyl alcohol drys, it may leave a small amount of residue behind (from the water, not the oil). This should not damage the blades but it is something you can notice when inspecting a lens. To minimize this, try gently dabbing off the blades while they are drying or using a hand air pump to blow the isopropyl alcohol off before it dries
Matt Bierner ok thank you. Compressed air can or just using mouth to gently blow?
A bulb blower works well. Compressed air usually overkill and canned air may leave more residue on the blades. Using your mouth is not great since you can end up blowing moisture onto the blades.
I took my copy apart to de-click it, but now when I set the aperture to wide open at f1.4, it slowly closes down to f2. Anybody know how I can fix this? Very helpful vid btw.
Did you ever fix this? I'd like to de-click a Minolta MC Rokkor PG 50mm 1.4 but I'm not sure if it will create problems