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Allen Smith Photography
Приєднався 10 лют 2012
Electro Mechanical Shutter Reveal
In this video I explain the electromechanical shutter control I made using a Raspberry PI Pico. I go over general operation and theory as well as wiring and code.
For downloads of the code and 3d files got to github.com/Drachimus/Electro-Mech_Shutter
To follow up with interest in possible sales of the shutter, reach me on Instagram at allen.r.smith.1
or discord
discord.com/invite/ZrUZ37Sx6A
For downloads of the code and 3d files got to github.com/Drachimus/Electro-Mech_Shutter
To follow up with interest in possible sales of the shutter, reach me on Instagram at allen.r.smith.1
or discord
discord.com/invite/ZrUZ37Sx6A
Переглядів: 57
Відео
Broken Oni Demonologist
Переглядів 25Рік тому
Broken Oni Experience while streaming on twitch. Twitch: www.twitch.tv/drachimus69
Electro-Mechanical Shutter Prototype for 8x10 large format camera
Переглядів 1982 роки тому
A short video demonstrating the function of my electro-mechanical shutter control system. I used a raspberry pi pico to drive the shutter through a mosfet to control the duration of the shutter opening. This combination works well with two 9v batteries in series from 1/30th of a second to as long as needed. The next step is to design and build a power supply to be able to supply a high enough c...
Coating Photographic Dry Plates
Переглядів 1,6 тис.3 роки тому
In this video I show my process for coating dry plates with silver gelatin emulsion. Materials Used; Fomaspeed emulsion www.freestylephoto.biz/174052-Fomaspeed-Liquid-Photo-Emulsion-with-Hardener-1-kg?gclid=Cj0KCQiAj9iBBhCJARIsAE9qRtDidI1aQ9h6luM1cAwHwf1M1g9mi_dXWdUbKHMG5htFgVIG5ADAC78aAhcZEALw_wcB Sheet Glass bought from home depot hot water bath wax warmer bought from amazon dosing syringe bo...
Compur Shutter CLA Part 4
Переглядів 4363 роки тому
This is the final video on the cla of a dial set compur shutter. I show the final assembly and where to lubricate. discord; discord.com/invite/ZrUZ37Sx6A
Compur Dial Set Shutter CLA Part 3
Переглядів 2863 роки тому
In this video, I continue the assembly and cleaning of my Compur shutter. discord; discord.com/invite/ZrUZ37Sx6A
Compur Shutter CLA Pt2
Переглядів 5963 роки тому
In this video I start the cleaning and reassembly process for a dial set compur shutter. discord; discord.com/invite/ZrUZ37Sx6A
Dial Set Compur Shutter CLA part 1
Переглядів 1,7 тис.3 роки тому
In this video I show the disassembly of a dial-set compur shutter getting ready for cleaning and re-assembly. discord; discord.com/invite/ZrUZ37Sx6A
LF Project Introduction
Переглядів 1223 роки тому
In this first video I outline my new large format photography project. Thingiverse file links: www.thingiverse.com/thing:3784279 www.thingiverse.com/thing:3449588 discord; discord.com/invite/ZrUZ37Sx6A
i recently acquired an Ica Nixe that uses a slightly different compur shutter (only has options I,B, & T, no Z, D, or M) i can't seem to get it to switch out of I mode, and also can't set the speed dial anywhere other than 1 or 2, wether the shutter is cocked or not. is it possible its just gunked up inside or did the previous owner damage something?
If the dials are stuck, then yes it's likely very gummed up and some of the levers are seized in place.
I’d be interested in one of those shutters to use a large aerial reconnaissance lens. Great detail here.
Thank you
one tip, for them, Don't have a long throw cable release, the cocking lever hangs up, it can't lock in the cocked position if the release(lever or cable in the socket) hasn't fully retracted.
thanks, I have a lens with this shutter ( in a Linhof tech iii 5x7") different case and the t\b\m is a post in a slot at the bottom, but similar in design, one nice thing about them is that the lens screws onto a flange nut, which is permanently screwed onto the lens board, so it is easy to change board styles, from one make to another, without having the screwdriver tool for the lockring, the speed dial has a cylinder on the top, allowing one to push the lens in the tightening or loosening direction of the screw thread.
Pretty cool, but it's hard to beat the venerable Packard Shutter.
True Packard shutters are really nice shutters , though they do make solenoid operated version that this control could work with as well. Except the 120 volt AC one.
Old plate cameras are cool and super cheap! Great video!
Thank you Allen for taking the time making this series. Its been very helpful to me as I clean and repair this old 150mm f3.5 Tessar lens I have. Spanner head screws scared me for a second, but came out fine using the points of a compass. A loose screw holding one of the shutter blades was causing the blade to not fully close correctly, thus fogging my film. Should be back together again today. Thanks again. P.S. I’ve visited your website and really enjoy your photographs.
You are most welcome. And thank you for your kind words.
@@allensmithphotography The shutter runs like it was brand new and zero parts left over!😃
@@alexanderstavroudis6901 yay
hey Allen, is this shutter in the lens? or it is shutter of film camera? i didn't understand what is this shutter used for?
It's a fair question. This is a large format lens with built in shutter. The camera it came on is a 9cm x 12cm folding camera.
@@allensmithphotography okay this is photography only lens then. I was reading about zeiss planar that had compur shutter and they removed that shutter to mount it on film camera. i was thinkinh why would they put shutter in a lens?
Sorry for the late reply, but the shutter in lens was the first steps to integrated shutters. They were made for faster media like film and dry plates in large format cameras and were adapters and evolved into compact and folding cameras.
KBr
Amazing project! I have a very similar solenoid shutter and I just was thinking about looking into making it work again 🤩 Have you had any luck refining your design?
I have completed the system I'm just working on documenting the software and electronic connections. Then I'll upload a update video with links to the software and 3d models for the case
at the moment I am trying to repair an Goerz Dagor in its original Compur, it looks like yours. I noticed that it is not possible to move the shutter blades at all, the inner ring the three shutter blades sit on ( at 01:04 ) is different than on newer Compurs, it seems locked in place. And this is the problem, on newer Compurs this ring is movable, so that the blades can actually shut or open. I wish you had close up videos of all the parts and its' locations..😀
I can certainly see what I can do to get more detailed footage. Though the shutter blade ring is still the part that moves with the older compur shutters. The big difference being they will often lock in place to prevent unwanted opening
@@allensmithphotography the odd metal ring does not move and it is screwed/secured down with that three tiny spanner screws (you remove in your video part 1 at 26:20 ). how does it move on your shutter at all? it should move easily on a 1/250 th speed ..on newer Compurs this ring is of very different material and it slides easily inside the case.
@@ast3663 the screws do hold it in place but they allow enough clearance that it moves freely. It is a close fit but moves easily in my shutter. It's quite possible in yours that the lubricants have dried out and are sticking the actuator ring in place
This would be great for a super accurate large format shutter inside of a lens. I could see this in a crown graphic or other large format without a focal place shutter. Keep it up!
Thank you. I have a few final touches to put in it, then I'll be doing a follow-up video with details and the full code and wiring diagrams.
Are you going to sell these? This would be so helpful for my barrel lenses!
I have no intention to sell them, but they can be built fairly inexpensively. And I will be making publicly available all code and parts lists with wiring diagrams. I'll also include the 3d print models I use. It's actually due to my barrel and process lenses that I'm building this shutter.
@@allensmithphotography that would be awesome! I don’t have a 3-D printer, but maybe I could have it made somewhere else and then make the electronics myself. Yes, this would be wonderful for barrel lenses!
@@lillianvalentine1975 absolutely. There are plenty of print to order services to get 3d prints. Though even wooden craft boxes or small plastic boxes could be used. For myself, it's more convenient to 3d print the casings for the electronics.
Hi! I've been doing similiar work but on a smaller shutter, i've managed to make an electronically controlled compur size 0 shutter, up to 1/2000th of a second
That's awesome. I'm hoping, with a better power supply, to get to 1/125th of a second. But with this type and size that's about the limit due to physical limitations of the solenoid.
I want one! Need a 8x10 first though...
They'll work on smaller cameras too. I'm just specifically making this one for an 8x10.
That is really helpful. Thanks for sharing.
You are most welcome. Glad I could help
Didn’t it ever accur to you your scale light is too bright and is not good for your film?!
It's definitely something to be concerned with for pan chromatic materials. But with Ortho it's not the right color to affect it.
Hi Allen Smith, I checked the dish and the emulsion is like yesterday a little sticky, it never seems to dry completely, what could I have done wrong? i use bloom 250 gelatin.
Most likely it just needed a gram or so more gelatin. When doing silver emulsion, you mix the halide salts with the gelatin and then mix in the silver nitrate solution to sensatize the emulsion. After letting it mix you add additional gelatin to compensate for the added liquid. I'm sure a similar addition would be needed with dichromate as well. At this point the only options would be to strip the emulsion and recoat the plates or let it sit longer. If you have a fan you can put a filter onto, you can use it to blow air over the plates. That would help them dry. But only put the fan if you can put a filter, otherwise you can get dust inclusions
@@allensmithphotography So I'm going to throw the rest of this emulsion away, and today I'm going to make another one using this recipe from a different tutorial I found on google, which says to use: 100g of distilled water, 12g of gelatin and 3g of dichromate. What do you do to prevent bubbles in the liquid emulsion?
@@henriquesantos.official hopefully the new recipe works better for you. As far as preventing bubbles, I don't usually worry about it until I coat the plates and at that point any bubbles showing on the plates can be popped
Friend, after you coat the gelatin emulsion on the glass, does it dry overnight or does it have to leave it for several days? Because I did when I took the glass a day later, it was sticky and not dry.
I leave mine for about 24 hours and it's dry enough to put away in the fridge. It may be that where you had yours was too humid and may need a bit more time. Because the emulsion should be leathery after a few hours unless there is too much moisture in the air or maybe some got into your emulsion
@@allensmithphotography I made the emulsion for hologram, distilled water, gelatin and ammonium dichromate 2 days ago, yesterday I coated 2 plates, placed them in a black box and left them, just now I went to look, I touched the edges and they are sticky, I have to leave more days or will they never dry up? it's my first experience.
@@henriquesantos.official it will dry over time. With your next batch, you may want to either reduce the amount of water used or use more gelatin. But this batch will dry with a bit more time.
@@allensmithphotography Thank you friend for taking your time and answering me. The temperature here is usually around 24C and Humidity: 65% I leave it to dry naturally inside the black box, but I'll check it again tomorrow.
My pleasure. I usually have mine in about 20-24 room temperature but our humidity is very low usually 10-20% so that does help drying times.
thank you friend for this good video
Most welcome
Did you sand the sharp edges off?
Yes. After I cut the glass I use a stone to remove the sharp edges. These particular plates are being reused
This showed up in my featured videos. UA-cam algorithm finally gets it right!
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any chance for part 3?:)
That should be up tomorrow. I'm working on the audio for it today