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Antique 4x5 camera creates 20 micron photolithography masks [video]

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Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#11

Post by paulmd »

madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

Impossible Project has brought back peel-apart 8x10 polaroid film. Currently $18 a shot, so not for the faint of wallet, but perhaps they will bring back 4x5 someday as well.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#12

Post by poooogles »

madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

>I have no idea where he’s finding film so cheap - I stopped when it was costing me £5 per exposure.

Ilford is £1.50 a shot + chemicals. Rodinal is pretty cheap and if you're printing then the fixer cost is negligible.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#13

Post by ginko »

splintercell wrote: post #10

Cringing it everytime he calls it an antique camera. This is like a millennial talking about an antique technology called 'VHS' tape.

I sorta agree. For me anything made after WWII isn't really antique. "Vintage" maybe. That Graphic View II he used was manufactured until 1967 and likely used professionally for many decades after.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#14

Post by piffey »

madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

There are still photographers shooting 4x5 in DC professionally with the press core. One is David Burnett and the other I can't remember off hand, but he's been shooting 4x5 of the congressional hearings. You just can't beat the quality of large format. With Kodak releasing Ektachrome in 4x5 this last January I've been shooting more and more of it. It's expensive for chromes, but shooting HP5 sheets is pretty cheap for the quality of the output in the end.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#15

Post by tecleandor »

Palomides wrote: post #5
madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

I literally just bought a box of the film he's using here, it's a high contrast red-insensitive film, $15 for 50 sheets, https://www.freestylephoto.biz/531345-Arista-Ortho-Litho-Fil... developing it for normal contrast images is more difficult but not impossible

Seems similar to xray ortho film, green or blue sensitive, and is pretty cheap.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#16

Post by ngcc_hk »

paulmd wrote: post #11
madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

Impossible Project has brought back peel-apart 8x10 polaroid film. Currently $18 a shot, so not for the faint of wallet, but perhaps they will bring back 4x5 someday as well.

Expensive roller to “develop” it though.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#17

Post by foldr »

poooogles wrote: post #12
madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

>I have no idea where he’s finding film so cheap - I stopped when it was costing me £5 per exposure. Ilford is £1.50 a shot + chemicals. Rodinal is pretty cheap and if you're printing then the fixer cost is negligible.

OP mentioned color positive film, which can go for around £5 a sheet.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#18

Post by ddingus »

canada_dry wrote: post #3

Ben Krasnow (a Googler by day) has one of the most incredibly interesting channels on youtube - and accompanying blog [1]. The effortless way he is able to describe complex processes and techniques used in his experiments borders on being Feynman like . [1] https://benkrasnow.blogspot.com/

I agree. He's a treasure, and I've learned so much. And learned it fairly easily.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#19

Post by foldr »

madaxe_again wrote: post #4

I used to travel with a crown graphic - pretty much the same camera as in the video, shooting colour positive. You can do some great stuff with them, and tilt-shift is trivial, if that’s your thing. Quality on slow film is just crazy - I’ve a shot of an ex, she’s half-frame, and you can see the second hand on her watch - you can get very fine focus with a loupe, and having a Polaroid back to do some instant tests was…

Are you sure you mean a Crown Graphic? A Crown Graphic is about as different as it's possible to be from the camera in the video while still being a 4x5 camera (https://vintagecameralab.com/wp-content/uploads/graflex-crow...). It also doesn't make tilt-shift movements as easy as you're suggesting.

Re: Antique 4x5 camera creates 20 micron photolithography masks [video]

#20

Post by chongli »

This is so cool! Questions for engineers:

How much work would it take to go from this process to producing a working chip in his garage, like a 6502 or something? Would it be at all feasible? He did point out a ton of defects in the final product, probably due to dust or scratches in his equipment/materials. Would it be possible to clean this up enough to get 1-2 usable chips from a single sheet of 4x5 film? Without turning his garage into a clean room?

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