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  1. Replies
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    Re: Swapping the pinhole with a lens

    As TC said - you need to be sure of the focus and it's not necessarily the distance from the iris to the film. Focus with a ground glass for your hyperfocal distance, then measure from the ground...
  2. Re: Check Your Ground Glass ~ Film Holders for Registration! Simple, Important and F

    Found this timely; I've just done similar but with a surface flat, offset depth gauge, and a distance piece. As shown in the OPs image, you're trying to measure the depth from the seating plane to...
  3. Re: Travelers: New X-ray machines WILL ruin your film

    Isn't mail from out-of-country locations bulk x-rayed once it arrives in the country? Any number of 'border guard' TV programmes seem to suggest that this is the case.

    If so, there would be little...
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    Re: Show off your Large Format camera!

    With a lens - Rodenstock-Sironar F5.6 150mm being what I had to hand - 2100g. Not heavy at all, though my home-made wooden camera, sans lens, is 1200g. I hate to think what the MPP Micro Press...
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    Re: Show off your Large Format camera!

    It's been a while, but here's a new toy: A Chroma 4x5. I may make some minor changes once I've played with it a bit, but at first look, a rather fine job by Steve.

    Apologies for the crappy mobile...
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    Re: Anyone using a MPP camera?

    Just to be different, I use an MPP Press - basically the same animal but with the rangefinder bolted on top and a focal plane shutter. The front standard is locknuts only, and tilts backwards to...
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    Re: Large Format Landscapes

    Damnit, Yuriy, you've got an excellent venue there - lovely shots!

    Neil
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    Re: Large Format Landscapes

    Ah, yes, thanks. I come that way over from the Quirang.

    Neil
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    Re: April Portraits

    Guess I'm not the only one who thought 'Eeeee, giant hogweed!', nasty stuff indeed. Hopefully if the stuff's as dead and dried as that looks, the model will be OK, but stay well clear if it's fresh...
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    Re: Large Format Landscapes

    Where was the location, Karl? Looks like it might be between Portree and Struan, off the hill road?

    Neil (whose parents have lived on Skye for forty years)
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    Re: 4x5 diy view camera rack/pinion question

    On my sapele camera, the slide is between wooden surfaces; the nylon gear is used *only* to provide for and aft focussing movement.

    The pinion gears have a short shaft, and I drilled through that...
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    Re: Astrophotography and Chamonix 45N-1

    Don't tracking alt/az mounts cause the image to rotate, over long exposures? They point at the right bit of sky, but that pesky earth will insist on spinning on its axis.

    Neil
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    Re: Practice shot with Cholla Part II

    I like the UFO explanation better :p

    Neil
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    Re: Practice shot with Cholla Part II

    I like that - though I'm curious about the UFO tracks in the top right corner...

    Neil
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    Re: What did you compose at Waters Edge?

    Very nice, Tuco.

    Neil
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    Re: Flowers Anyone?

    An interesting halo effect around the two red flowers in the background - something going on with chromatic distortion, focussing differently perhaps?

    Neil
  17. Re: UK Spring gathering 21st 22nd April - Kidderminster

    Just seen this - interested, but don't as yet know if I'm available that weekend. An MOT may get in the way first...

    Neil
  18. Thread: Adox Film

    by barnacle
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    Re: Adox Film

    @G Bemain: unfortunately I can't be in *any* way precise; I tend to be very much a stick my thumb in the air and guess type and I certainly haven't done any formal measurements.

    I'm trying - and...
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    Re: Speed Graphic inaccurate focus

    A thought - does it suffer from the same issue as my MPP? The ground glass is at 5.08mm, but the Fidelity film holders put the emulsion at the current standard 4.80mm. The ground glass is positioned...
  20. Thread: Adox Film

    by barnacle
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    Re: Adox Film

    I'm fond of the CHS 100 type II - I like the ortho look. I also like that it will work with long exposures so I can photograph gloomy interiors.

    Neil
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    Re: When did selenium toning become popular?

    Speculating here: was the presence of significant amounts of atmospheric sulphur (and the various oxides thereof) from burning coal for everything in the late 19th century and early 20th significant...
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    Re: March Portraits

    Apropos of nothing at all - that image reminds me of the way my grandfather - nearly sixty years ago - used to make his black and white TV 'colour' using a coloured cel blue at the top and green at...
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    Re: March Portraits

    Yuriy,

    Aaah, *that's* what was missing from the still life. Lovely.

    Neil
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    Re: still life 2018

    Loving that, Yuriy!

    Neil
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    Re: DIY Drum Scanner?

    Indeed; flying spot telecine using a raster generated on a cathode ray tube is (was) a common way of turning both still and moving images into TV signals.

    Regarding lasers, as discussed above - if...
  26. Re: What's the correct name for the big crank-up camera tables old studios used?

    While looking for something else, I found one currently for sale through www.the-saleroom.com - search for 'camera stand'.

    Neil
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    Re: DIY Drum Scanner?

    Yep, first thing to start with is the sensor/light source. And to start with I'd work in mono; three channels is just multiplication.

    Bruce, I suspect there may still be a need for a log amp...
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    Re: DIY Drum Scanner?

    Andreas, no offence understood or taken!

    Light sensors include:

    - photo resistors, where the resistance changes depending on the light falling on it. Pros - cheap. Cons - neither fast nor...
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    Re: Old Things,Farms,Barns,Buildings, Plus

    Funny you should say that, Willie - in the Viking Ship Museum in Oslo a year or two back, I had an interesting discussion with the operators as to whether I needed a tripod ticket to use a monopod......
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    Re: DIY Drum Scanner?

    Call me a generalist, Andreas; I'm a software developer working on the bare metal for domestic products - but I also develop the hardware and previously developed deep-drilling robots for bore-hole...
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    Re: DIY Drum Scanner?

    Oddly enough, I was thinking about the very subject only this month (something to distract me from the day job)... and it occurred to me that the critical point of a drum scanner is, basically, an...
  32. Thread: 4x5 Camera

    by barnacle
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    Re: 4x5 Camera

    Thanks, Steve - I rather thought that might be the answer. But I had to ask... there are always a number of people hanging out here with a desire to build our own camera, and the bellows are always...
  33. Thread: 4x5 Camera

    by barnacle
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    Re: 4x5 Camera

    Hmm... I don't suppose you'd be able to supply a kit of bits to make a bellows? (He said hopefully, fully aware that you're probably up to your ears in production...)

    Neil
  34. Thread: 4x5 Camera

    by barnacle
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    Re: 4x5 Camera

    "When I am an old camera, I shall be purple" :cool:

    I too am a fan of the purple camera. And further, I think you're doing good work here, and wish you the best of it. Much as I love the antique...
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    Re: Show us your home made camera...

    Some interesting videos there... but my word it looks heavy - what does it weigh?

    Neil
  36. Thread: 4x5 Camera

    by barnacle
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    Re: 4x5 Camera

    I like the general look of it (did in the 'show your camera' thread) but I can't see how the focussing/film holder works. There is discussion of magnets, but nothing showing how it's done.

    Neil
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    Re: Computer Technology

    Can't argue there; most of them seem only to know how to link to abstraction layers on top of abstraction layers on top of abstraction layers. It's fast, but there's no reason to believe it will...
  38. Re: Can you do wet plate collodion on copper plates?

    It's been a long time since I saw the demonstration, but I'm pretty sure you're going to end up plating the surface of the copper with silver (and probably dumping copper nitrate into the silver...
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    Re: Speed Graphic Shutter Checking?

    Ack. Posting while half asleep - I conflated what I posted earlier in the thread and what I intended to/thought I had posted... I fear I have also lost myself :)

    Sorry about that.

    You are quite...
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    Re: Speed Graphic Shutter Checking?

    As an experiment today, I took five minutes to use an LED and oscilloscope as discussed earlier. With the lens wide open and an LED torch pointing through the lens, the signal was about 200mV, but...
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