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    Re: Enlarge lens 150 vs 135

    63mm ?
    I have the 63mm f/2.8 'N', the earlier one I think was f/3.5 ?
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    Re: Enlarge lens 150 vs 135

    Thanks, I dug out some of the info on that one.
    It's interesting that it's a double-gauss type construction, unlike all of the other premium brands which are Plasmats. I wonder if the 105 is the...
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    Re: Post Your Smaller Format Trees!

    Nice subject !

    Here is a Beech, Infra-Red, old Llangwyfan woods, Denbighshire, May 2023
    Fuji GW690 III with Rollei Superpan 200 & Hoya R72. Dev in PMK.
    The neg was overexposed by about a stop,...
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    Re: Deranged Aperture Blades

    How do you know which blade to put on first, and how do you know whether they go on anti-clockwise or clockwise ?
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    Re: Enlarge lens 150 vs 135

    It should be great.
    I think this market has got very confused with people using enlarger lenses for macro 35mm work. Maybe the older El-Nikkor 135 has some cult following ?
    I myself just went...
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    Re: Deranged Aperture Blades

    Yes, agreed.
    I received a 100 Componon-S from the US this week, it was loosely wrapped in bubble wrap, without any sellotape, and then stuffed into a Jiffy bag. I have no idea what some people are...
  7. Re: 8x10 shooters, can HP5 come close to Tri-X 320?

    6x9cm HP5+ in PMK for ref, I will be getting another box of 5x7" soon.
    https://ibb.co/WpSZpFy
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    Re: MF (6x4.5,6x6,6x7,6x9,6x12) B&W film images sharing

    A snowy shot here that I just printed and scanned. Sorry this print didn't get retouched...
    'Glyn Arthur lodge' ( Denbighshire, N.Wales ) March 2023

    Fuji GW690 III with HP5+
    Printed on my new...
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    Re: Enlarge lens 150 vs 135

    I have no idea what you're talking about.
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    Re: Enlarge lens 150 vs 135

    Very cool.
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    Re: Enlarge lens 150 vs 135

    I'm wondering if it's that a more 'pointed' aperture shape makes the transition between being in focus and slightly out of focus more obvious - ie. it snaps into focus a little more clearly ?

    ps....
  12. Thread: Ciao from Italy

    by Mark J
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    Re: Ciao from Italy

    Hi and welcome to the forum. Lots of good info here.
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    Re: Enlarge lens 150 vs 135

    It will do that, but the pattern will be modified, with some 10-fold symmetry, and a little more energy in the rings. However the effect on MTF ( ie. for most continuous subjects) is likely to be...
  14. Thread: 180mm Componon?

    by Mark J
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    Re: 180mm Componon?

    The Ilford filters come in 6" square if you want. I'm doing more or less what ic-racer is doing , with a 210 Schneider. Currently I'm just resting them on an empty red-filter holder, but there's a...
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    Re: Enlarge lens 150 vs 135

    Well, you're not looking for bokeh on an enlarging lens.

    There must be some reason Schneider did this, and I'm not sure why. it's not a cheap diaphragm either, it's dual-layer.
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    Re: The Ortho Look On Pan Film

    Surely a strong-ish Cyan filter is what's needed ?
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    Re: my show, "Bearing Witness"

    That's a lot of hard work to frame up that many prints. Nice shots !
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    Re: Enlarge lens 150 vs 135

    If from 2005 it will be the final version of the Componon-S, the ones with the blue illuminated scale. You'd have to go back pre-80's for it to be a 'Non S' .
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    Re: Enlarge lens 150 vs 135

    I would advise testing that you get the quality you need in the corners with a 135 Nikkor at higher magnifications.
    On paper you can see ( from looking eg. at all Schneider Componon-S lenses ) that...
  20. Thread: 5x7 enlargers?

    by Mark J
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    Re: 5x7 enlargers?

    Yes, I'm not sure still that I am 100% sure of every control.
    The DeVeres are well know for their front controls, but I did find the focus on the 504 rather too coarse, it could have done with a...
  21. Thread: 5x7 enlargers?

    by Mark J
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    Re: 5x7 enlargers?

    Yes, the DeVere 504 is more solid than a 138 S. I used one regularly, years ago. You would not ( like I did on Monday ) knock the enlarger head off-centre slightly by catching your head on the neg...
  22. Re: Rear element stuck on lens, need some ideas to get it off

    Now check that all the shutter blades are still on their pivots and that the housing has not parted on one side.
    I speak from bitter experience after someone helped me to get a dent out of the front...
  23. Thread: 5x7 enlargers?

    by Mark J
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    1,695

    Re: 5x7 enlargers?

    I debated whether to go for 5x7 or 4x5 about 20 years ago, I'd used 4x5 briefly, but then moved to 6x9cm with a Horseman and was very happy with that. I concluded then, that some fine-grain films in...
  24. Thread: 5x7 enlargers?

    by Mark J
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    Re: 5x7 enlargers?

    Good effort ! (Tim)
    i spent years thinking about doing that with my Gandolfi, but eventually I just weakened and bought the Durst ( and I was older and had more spare change ) .
  25. Re: New Lens Scale: How To Convert Milliseconds To Standard Camera Fractions?

    The other option is to adjust your film speed on the meter.
    In my case I would rarely shoot at faster than 1/60th sec, so based on Neil's table above, I'd add 2/3rd of a stop to the film speed - eg....
  26. Thread: 4x5 vs 5x7

    by Mark J
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    Re: 4x5 vs 5x7

    Sounds like fun !
    It works for my PMK-based system because the developer is one-shot ; then I use half-strength stop bath which is also discarded ; then the lights can go on when the fixer is in...
  27. Thread: 4x5 vs 5x7

    by Mark J
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    Re: 4x5 vs 5x7

    Credit goes to Alan Clark in the UK. I have not tried the idea of the wooden cover for 'lights on' use, that's also clever.
    http://www.film-and-darkroom-user.org.uk/forum/showthread.php?t=1883
  28. Re: New Lens Scale: How To Convert Milliseconds To Standard Camera Fractions?

    On a calculator you'd use the reciprocal ( '1/' ) of the amount in seconds, to get the bottom number. So 101 milliseconds is 0.101 seconds, reciprocal is about 10.

    Your numbers for the right...
  29. Thread: 5x7 enlargers?

    by Mark J
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    Re: 5x7 enlargers?

    I've just refurbished and installed a Durst 138 S in a small darkroom. The Durst's are big but less of a beast that the DeVere. You probably won't see one at a reasonable price in the US though.
  30. Thread: 4x5 vs 5x7

    by Mark J
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    Re: 4x5 vs 5x7

    This is what I use for 2 sheets of 5x7" . Based on a thread on FADU forum. These are plastic bolts epoxied into an 8x10 tray. I haven't felt the need yet to go to a bigger tray for 4 sheets, since...
  31. Re: Big snow coming to the Sierra Nevada this weekend

    Can we have some of your snow ?
    Still waiting here.
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    Re: Durst 138 / 138S heat filter question

    At the end of my experiments here, i've actually got the Durst working and I'm not so far using the heat filter.
    It turns out that for prints at 16x20" , I am OK using a 160W linear halogen bulb in...
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    Re: Fomapan filter factors ?

    I know what you mean, but I don't know how easily I could use all of that extra data in the time it takes to take a photo. For me it seems enough to get a good fix on the change of the average...
  34. Thread: Push and Pull

    by Mark J
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    Re: Push and Pull

    It's not really a funny-acting emulsion, the 100 and 400 are pretty basic, quite old-fashioned. the 200 is a bit more like a modern T-Max style emulsion.
    There is an anti-hahltion layer but it's not...
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    Re: Thoughts on 5x7 Linhof Technika invited

    Not everyone who posted in 2006 will respond to a PM !
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    Re: Meopta Belar 4,5/210mm

    That is a nice shot - great to be able to take a 'snapshot' on 5x7" !
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    Re: Fomapan filter factors ?

    Thanks, those are useful starting points. Maybe suggests that the published curve is not as odd as shown, if you can use Delta 100 numbers ?
    I can believe the G(XO) is only 1 1/2 because I...
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    Re: Fomapan filter factors ?

    Exactly - a third of a stop.
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    Re: Fomapan filter factors ?

    I could have predicted that this is the way it would go.

    Yes, I know how to do the work, it's just that the idea of a forum is that we can share information and that someone might already have...
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    Fomapan filter factors ?

    Hi All
    I'm just wondering is anyone has worked out any filter factors for the Foma emulsions.
    I'm well into a pack of 5x7" already, mainly test shots of one sort of another, but hoping to keep my...
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