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Thread: Advice needed - Cleaning smudged groundglass

  1. #1
    Tsarkon's Avatar
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    Advice needed - Cleaning smudged groundglass

    Hi all! Here's my latest conundrum. I'm restoring a Horseman 980 and would like to get any advice on what this smudge on the groundglass could be and if it's an easy fix or something I should take to the shop. As it is now the groundglass works alright although there is some perceived blurriness I believe due to this smudge. I think there are some sandwiches layers going on here and I've never taken a groundglass assembly like this apart. I'm crossing fingers and toes that this isn't something like mold or any permanent damage. Has anyone seen anything like this before? See photo:



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  2. #2

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    Re: Advice needed - Cleaning smudged groundglass

    take it out n wash it with dish soap and hot water.

    take note of how its all orientated if its a sandwich or has a Fresnel.



    .

  3. #3
    Tin Can's Avatar
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    Re: Advice needed - Cleaning smudged groundglass

    I have cleaned many GG, which is often the first thing I do with any camera

    both sides

    Horseman may have shims, so take it slow and keep every tiny bit in order

    Not difficult
    2022

  4. #4
    Photographer
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    Re: Advice needed - Cleaning smudged groundglass

    I don’t know about Horseman, but washing a ground glass will remove the lines on some ground glass screens. Take it slow and test on a corner.
    Keith Pitman

  5. #5

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    Re: Advice needed - Cleaning smudged groundglass

    looks like moisture between a (plastic) fresnel and cover glass.

    Do note proper orientation as you disassemble!

    Glass you can clean with warm water and dish soap. Rinse warm...dry with hair dryer or air-dry.

    Plastic fresnel...luke warm at most - and be careful cleaning this! Gentle, circular motion (to follow fresnel grooves) with a warm(ish) slightly soapy water moistened cotton swab - then rinse, and leave out to dry, or blow off with cool (to slightly warm) air...but not hot!

  6. #6

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    Re: Advice needed - Cleaning smudged groundglass

    +1 for John's post. Plastic Fresnel screens are very easy to scratch (don't ask me how I know )

    Doremus

  7. #7
    Tsarkon's Avatar
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    Re: Advice needed - Cleaning smudged groundglass

    Awesome! Thanks for all the words of wisdom everyone. This is exactly what I needed to get courage enough to take a stab at cleaning it. I'll post an update after I'm done.

    Sent from my Pixel 4a (5G) using Tapatalk

  8. #8
    Tsarkon's Avatar
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    Re: Advice needed - Cleaning smudged groundglass

    Back with the update! The glass is clean! I hardly touched the fresnel but it seems the glass was what needed the attention anyway. I did accidentally knock away some paint that was the frame guide but it doesn't seem very necessary. I actually might purposefully remove the rest at some point. There's still an indication of where the paint was and i kind of like how it looks without the black paint there. I suppose it was dry and given how fine the lines are it popped off with the lightest touch. I used qtips so luckily we t happened to one and then I was able to stop before wiping them all off. I'm happy now that the glass is clean and focus should be much easier to achieve.

    Next part of this project is replacing the bellows! Wish me luck!

    Sent from my Pixel 4a (5G) using Tapatalk

  9. #9

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    Re: Advice needed - Cleaning smudged groundglass

    Great job! Its amazing how a truly clean ground glass can be so inspiring!

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