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  1. Re: Source needed for KCN, potassium cyanide

    You don’t need kcn for gaining a color. Developer can also give you a warm color.

    http://collodion-art.blogspot.com/2011/09/three-fixer-test.html
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    Re: Longest Wet Plate Exposure Times

    My longest one was over 20 minutes. Outside.
    Of course the camera was in the shade.
    And can always place a wet towel inside the bellows to prevent the plate from drying.
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    Re: Help with brass lens

    http://https://www.facebook.com/100000725324881/posts/1191236357577197/?
    Here you can see how to measure it quite accurate.
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    Re: Wet plate image sharing July 2020

    11 x11"tintype
    Dallmeyer 5d at f6
    exposure time 4 seconds
    Model, assistent and wine taster, Ferry van der Vliet
    206322
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    Re: Optics cleaning with Collodion

    You can even clean your glass plates with old collodion left overs.
    Most effective way to clean glass
  6. Re: Small white streaks on plates, what's the cause?

    Comets are caused by dust particles. Mostly fallen on the plate AFTER the plate is placed into the plate holder.
    So make sure you are using a clean plate holder. After exposed take out the plate...
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    Re: Wet plate image sharing July 2029

    Just noticed the 2029..... can’t change it anymore��

    Changed!!!!
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    Wet plate image sharing July 2020

    Recently I had the honor to make this triptych of Jimmy Nelson. An amazing photographer who is traveling all over the world and making breathtaking work, mostly analog. His two books 'Before they...
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    Re: Petzval in shutter

    This might be an option. Surely for a relatively short petzval.
    https://www.youtube.com/watch?v=kZVT3RNu7HA
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    Re: Collodion - Wet Plate Images

    It has been a long time ago i posted something
    “Heavenly temptation”
    Dallmeyer 5d at f6
    8 seconds
    198261
  11. Re: Adjustable Spacing in Jamin Darlot Petzval Lenses

    As Rudi says, it made it possible to use the front part only as a landscape lens.
    As far as i know it wasn’t meant to correct anything.
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    Re: DIY Rigid Fresnel

    Mount it (the ridges) towards the grinded side of your ground glass and it will have the same effect.
    But than it is protected by the glass
  13. Re: Ideas for new shutters 40 years from now when ours are all dead

    Not when you want to shoot wide open on a bright day.
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    Re: Lens caps? Bought or made?

    Just do it your self

    http://collodion-art.blogspot.com/2010/08/making-your-own-lenscap-isnt-that.html
  15. Re: How to unscrew a stuck lens element...

    But what’s the effect on the balsam when it gets in contact with the side of the glass elements?
  16. Re: Hermagis Serial numbers Need your help with a database

    Definately not 400mm.
    That size is a 300mm lens. I have two with exactly the same size.
  17. Re: Understanding Allen Rumme's Lens Database

    My advice when you start with wet plate: workshop.
    After that: start small.
    It’s like digital camera’s. The greed for bigger plates is like the greed for more pixels.
    But your picture will not...
  18. Re: Any tips & tricks for operating lenses without own shutter (lens cap on-off)

    Take of the cap and hold it in front of the lens instead of pulling it of.
    With wet or dry plate it works fine because of the low iso value. No vibration and always ready the exact monent.
  19. Re: Information on Hermagis Petzval Lens

    Steven, i don’t think you really need a petzval that big to cover 8x10”.
    I have been using 300mm hermagis petzvals for 8x10 without any problem.
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    Re: is THIS fungus or something else?

    You win. Good luck!
    Next time check what was being used in the pharmaceitical bottle...��
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    Re: is THIS fungus or something else?

    If you know the difference between fungus and separation of the balsem you wouldn’t post these links.
    Both lenses shown in these links have a separation problem and that’s a totally different thing....
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    Re: is THIS fungus or something else?

    Coated lenses were already used during wwII. Not only after.
    I wasn’t refering to the ansco camera. I was speaking in general.
    It was invented in 1935, the Germans started using it already at tbe...
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    Re: is THIS fungus or something else?

    And tbe coating was invented in 1935. So maybe these lenses were already coated
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    Re: is THIS fungus or something else?

    No, i just said I have never ever seen a non coated lens with fungus.
    So i really would like to see a picture of it.
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    Re: is THIS fungus or something else?

    Show me one single picture of a non coated lens with fungus please.
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    Re: Using a Petzval portrait lens

    While using a smooth backdrop you will never see swirl. Even when using it wide open.
    You will only see it when the background has a certain pattern or outside when there is a background with leaves...
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    Re: is THIS fungus or something else?

    When it is a non coated kens it can't be fungus.
    Fungus only grows on coated lenses.
  28. Re: Help with Hermagis Petzval lens info

    Have you checked the glass for writings?
    Most of the time the year of build was written on the side of the front glass.
  29. Re: Recommendations for a 1,000+mm lens for 11x14 needed

    Hust curious, why do you need 1000mm+ for 11x14"?
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    Re: DIY 4x5 Wet Plate holder

    You are right!
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    Re: DIY 4x5 Wet Plate holder

    Yes, no problem. Stainless will do the job
  32. Re: Hermagis Serial numbers Need your help with a database

    Thank Steven for all tbe work!!

    Regarding to your new Hermagis.
    Are you sure it's something originally made by Hermagis?
    I have never seen it before.
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    Re: Best soft focus lens for the money?

    Just a silk stocking covering any lens....
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    Re: Petzval lens question.

    As i love the (swirly) softnes of a petzval i hardly ever stop down a lens.
    if you want to stop down a petzcal you can also just use a more modern, smaller lens.
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    Re: Some Soft Focus Lens Sales Information

    I am sure a clever buyer contacted them directly and offered a double amount of money....��. And no, not me.
  36. Re: Mounting lens without the original flange~

    Machining a new flange wasn't an idea. Sure he knew that himself....
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    Re: Some Soft Focus Lens Sales Information

    Has something been changed on EBay? I always could find the sold item by using the above mentioned numbers.
    But that isn't working anymore
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    Re: 400mm f4 Charles Shepherd Questions

    A 250mm for 8 x 10"is rather short. It morely will act like a wide-angle.
    You won't notice the swirls when using a even background.
    For 8 x 10"i prefer to use at least 350mm.
    For my storytelling...
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    Re: Help understanding brass lenses

    As you will shoot landscapes you don't need fast petzval lenses. Just look for a zeiss jena or a but slower but tack sharp apo ronar lenses. They are rather but but very good.
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    Re: Some Soft Focus Lens Sales Information

    How big was the Hermagis globe?
    I have one in my collection.
    It has a beautiful change apparture mechanism.
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