Could it be scratched?
Could it be scratched?
Hi.
I’m so sorry for this weird topic
It’s here for a short time, I just want to find some help on here
After I watched with immersion oil I cleaned an objective with simple paper. 100x and 40 x too because it caught a little bit of it too.
Now, it looks like this. Is is scratched, what do you think?
And if yes, how much could it cost to repair it?
I’m so sorry for this weird topic
It’s here for a short time, I just want to find some help on here
After I watched with immersion oil I cleaned an objective with simple paper. 100x and 40 x too because it caught a little bit of it too.
Now, it looks like this. Is is scratched, what do you think?
And if yes, how much could it cost to repair it?
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Re: Could it be scratched?
Hi
Hard to tell. Some of the mark looks like a partial fingerprint so it seems likely it's just dirt. What objective is it exactly?
You should only use proper lens tissue for removing oil. Also you should only wipe the metal part of the lens - not the lens glass itself. To remove oil from the glass part just use a corner of the lens paper to 'wick' the oil from the glass. Assuming the mark is removeable, use some lens tissue dipped in isopropanol to gently wipe the surface. Hopefully, that will remove the marks.
Louise
Hard to tell. Some of the mark looks like a partial fingerprint so it seems likely it's just dirt. What objective is it exactly?
You should only use proper lens tissue for removing oil. Also you should only wipe the metal part of the lens - not the lens glass itself. To remove oil from the glass part just use a corner of the lens paper to 'wick' the oil from the glass. Assuming the mark is removeable, use some lens tissue dipped in isopropanol to gently wipe the surface. Hopefully, that will remove the marks.
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo
Re: Could it be scratched?
Hi,
I'm fairly sure that these are no scratches. My guess is that you have old gummed up immersion oil on the lens, it got sticky from cleaning but wasn't removed and a bit of paper tissue got stuck.
Do you have a loupe or stereo microscope to inspect the front lenses?
Bob
I'm fairly sure that these are no scratches. My guess is that you have old gummed up immersion oil on the lens, it got sticky from cleaning but wasn't removed and a bit of paper tissue got stuck.
Do you have a loupe or stereo microscope to inspect the front lenses?
Bob
Re: Could it be scratched?
It that a cell phone photo taken through an eyepiece? Stuff on the objective is usually way out of focus. Could this be dirt on the condenser top lens you are focusing on?
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- Posts: 1167
- Joined: Tue Jul 07, 2020 1:51 pm
- Location: Scotland
Re: Could it be scratched?
Yeah - that seems likely!
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo
Re: Could it be scratched?
No.. after I turned it to 4x and to 20x it was gone..
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- Posts: 1186
- Joined: Tue Oct 20, 2020 6:44 am
Re: Could it be scratched?
Things in the ocular path may well not be seen at lower magnification but will be seen at 40 or 100x.
Loosen the objective so you can rotate it. Focus the objective and rotate the objective. If the smudge doesn't move the problem is not the objective.
Loosen the objective so you can rotate it. Focus the objective and rotate the objective. If the smudge doesn't move the problem is not the objective.