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Yellow-green filters

Discussion in 'Everything Film' started by steveandthedogs, Mar 20, 2019.

  1. steveandthedogs

    steveandthedogs Well-Known Member

    Just been given one and have forgotten how much change in the stops - two stops difference?

    S

    ps this isn't an age-related memory problem. I've always been like this.
     
  2. PeteRob

    PeteRob Well-Known Member

    Sounds a lot. I'd suggest measure it.
     
  3. Petrochemist

    Petrochemist Well-Known Member

    It does depend of the filter, if it has the written code on it it's easy to look up.
    I have a green filter that blocks about 18 stops, and another that's only 1 stop, the latter would be more common. :)
     
  4. steveandthedogs

    steveandthedogs Well-Known Member

    Thinking about it, I suspect I'm conflating stops and factors.

    Probably nearer one stop. And get the meter out to check.

    S
     
  5. steveandthedogs

    steveandthedogs Well-Known Member

    It's Russian and old.
    The only lettering on it translates as zh s -17

    Which is all Greek to me.

    S
     
  6. Fishboy

    Fishboy Well-Known Member

    A quick search of ZH s-17 filters suggests half a stop.

    Cheers, Jeff
     
  7. steveandthedogs

    steveandthedogs Well-Known Member

    Never occurred to me that it would be on the net...

    Thanks Jeff.

    S
     
  8. Fishboy

    Fishboy Well-Known Member

    I don't know whether it should be taken as gospel but I suppose it's a starting point - the information came from a couple of Ebay sales of them that both claimed half a stop (and another that said the filters were designed for Lubitel cameras!).

    Cheers, Jeff
     
    steveandthedogs likes this.
  9. nimbus

    nimbus Well-Known Member

    ! would reckon 2 stops as a minimum, more likely 3,
     
  10. Petrochemist

    Petrochemist Well-Known Member

    Based on What?
    Wikipedia suggests Yellow green filters typically have a filter factor of 2.5 giving 1.3 stops extra exposure needed.
    2 stops would be about right for an X1 filter (quite intense green)...
     
  11. neilt3

    neilt3 Well-Known Member

    I use a yellow green filter quite often and usually give an extra 1.5 stops over my meter reading , usually taken with a Minolta spot meter , when shooting medium format and large format .

    On SLR cameras with TTL metering , I leave it to cameras as I usually shoot in aperture priority .

    Yellow filters I give 1 extra stop .

    I develop all my own film , and they come out as expected and intended .
     
  12. neilt3

    neilt3 Well-Known Member

    That's a heck of a lot extra for a yellow green .

    I give Yellow 1 stop extra
    Yellow/green 1 1/2 stop extra
    Orange 2 stops extra ( I have somewhere a deep orange which I give an extra 2 1/5 stops)
    A Red filter an extra 3 stops
    And an R72 ( infrared filter used with Rollei IR400 ) an extra 6 stops , metered off weathered stone , not grass giving an effective ISO of 6 . Grass would tend to need extra with I.r so would have to give an extra 7 or so stops .
     
  13. steveandthedogs

    steveandthedogs Well-Known Member

    You lot are going to love me.

    I’m not sure what the damn thing is. It’s greener than a yellow, but not as green as another green-yellow I’ve just dug out.

    Tempted to just give it one extra stop.

    I use an R72 with Rollei R80s and five to six stops.

    S
     
  14. neilt3

    neilt3 Well-Known Member

    I have several yellow/green filters , Japanese ones I've bought and Russian ones that came with lenses in their cases for my Kiev 88 and so on .
    I don't think I've got two the same !
    All different shades/densities etc , so I treat them all the same ( when I remember !) and give the same amount of extra exposure to compensate .

    Different films respond in different ways when you use these filters , so it's not a hard and fast rule anyway .
    Given that your using it on black and white film with it's good latitude , 1/2 a stop either way doesn't matter .
    It's not like your shooting slides .

    You've just reminded me , I bought some Rollei R80s to try as infrared film rather than the Rollei IR400 film as it's a fair bit cheaper , and loaded it in a Mamiya TLR .
    Then forgot that's why I got it and shot the whole roll as normal B&W ........:confused:
    I'll have to get another roll and see which I prefer .
     
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  15. steveandthedogs

    steveandthedogs Well-Known Member

    The few Bits I've seen about this filter seem to reckon it is yellow.
    I still reckon it has a fair green component, but I'll go with the flow and call it yellow.

    As regards R80s, I like it. Fairly contrasty, but the IR effect works almost as good as IR400. R400s works as well and is cheaper then IR400.

    https://flic.kr/p/z6qSrP

    That's with a Minolta AL and R80s

    S
     
  16. Petrochemist

    Petrochemist Well-Known Member

    Yes the examples shown on Google look more yellow to me. Half to one stop should be enough, if you don't have TTL metering.
     
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  17. Terrywoodenpic

    Terrywoodenpic Well-Known Member

    Traditionally yellow green filter for use with pan films was 1.5 stops.
    this is true of most on offer in the UK and is the case for ones from rollei and zeiss.
     
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  18. David Loxley

    David Loxley Well-Known Member

    Stirring the bottom of this barrel.
    Histe(o)rical stuff: Taken from The Johnson Photographic Year Book 1955; Kisselbach, The Leica Book: Matheson, The Leica Way
    and Hoya filter leaflet. For both panchromatic and orthochromatic, in parentheses, film.
    Hoya and Matheson 2½; Kisselbach 3
    Johnson: Ilford, Nebro, Photax, Priory, Zeiss 2, (3)
    Johnson, 2, (2)
    Actina, 2, (4)
    Photoscience, 2½, (4)
    Use a Leitz GGr filter and tried measuring the exposure factor change with my Lunsix.
    It sensed little change as did my WestonMaster.
    I use a factor of x2 and the results are good with Delta 400.
    Is ortho film still available?
     
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  19. Learning

    Learning Ethelred the Ill-Named

    It depends on how you develop your film. I used to reckon on half a stop with verichrome pan. I was a schoolboy at the time. Now I am 75 plus.
     
  20. steveandthedogs

    steveandthedogs Well-Known Member

    Bloody hell, isn’t it about time you put it in the fixer?

    S
     
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