Author Topic: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)  (Read 16527 times)

Ed Wenn

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Note: This post was rescued from a long-forgotten and now disused section of the Filmwasters website, but at the cost of the images which originally accompanied this fine how-to, by 'Chemical' Al Cooper. Al dug up the original images after I posted the tutorial and posted them below. I then re-edited this piece to re-insert the images....which is whey there are two consecutive posts containing the same images.

A Coronet 4-4 Mark II Mod: by Al Cooper

Old 127 cameras are in plentiful supply at boot sales, flea market, or on your preferred Internet auction site. They're often small, lightweight, simple plastic contraptions and they come in a remarkable variety of funky design. Unfortunately, even if you're lucky enough to find a ready supply of 127 format film it tends to hit the wallet pretty hard; you can normally buy two rolls of 120 for the cost of a single 127 roll. On top of that, there isn't a wide range of film flavours in the 127 format.

So if you have a specific 127 format camera (more about that in a minute), you want to use it, but you're looking for a cheaper alternative to 127 film you could try 35mm film instead. It's an obvious candidate as it isn't that much different in width to 127 and there's a much bigger selection to choose from. The bummer is that most 127 format cameras simply aren't big enough internally to hold a 35mm film canister, but there are a few prized 127 shooters that can, including one Olde English classic, the Coronet 4-4 Mark II; a very basic, albeit finely crafted plastic cam made in Birmingham, UK in the 1960s.

Broadly speaking, the Coronet is cut from the same cloth as the Diana, with its black plastic body and grey/blue top section. It has excellent toy camera credentials too; a plastic lens, a simple barrel mounted shutter, and, er...that's about it! They don't come much more basic (or beautiful) than this. Because of the smaller film format, the 4-4 somehow feels better in the hand than either than Diana or the Holga and once you've held one, you're hooked. If you're lucky, you may find a 4-4 still with its outstandingly rubbish brown plastic case, but with or without it, eBay auctions for Coronet 4-4 Mark IIs regularly end without a bid so you're almost guaranteed one for that special low, low price.
 ;)

Down to business then; lets get modding. Whip the back off your Coronet and remove the take-up spool. Trim the film leader from a roll of your chosen 35mm film and attach it securely to the take-up spool with tape; regular thin clear sticky tape is fine for this.



Now simply shove the 35mm canister into the left hand compartment. It's quite a snug fit, but, trust me, it will go in! Don't use any bits of foam or card to try to apply tension to the canister spool, as having slightly slack film is actually an advantage here. It will tend to follow a curve roughly equivalent to the original film plane of the camera. If the film is pulled tight across the frame window, it may be too close in the centre resulting in images that are in focus at the edge and out of focus in the centre. I'm sure there must be an application for that, but I can't think of one! Pull out some film and slot the take up spool into its normal position.



OK, now we're pretty much done, but there's one small problem. There's obviously no frame numbers to see through the re window so how do we count the frames? The Coronet has a rather natty ratchet wind on lever, which makes judging frames even more difficult than cameras with the more usual wind on knob (i.e the "34 Clicks" rule that you can use on a Holga). One way round this is to wing it; give it a good ten cranks for the first few frames, then decrease this as you go on - and enjoy the double exposures that probably still result.  :D For those of you who just have to do things the right way, there's another option - employ a sprocket hole clicker counter. For this I use curvy plastic cut from one of those plastic spiral document binder contraptions, but any bit of curved, thin, springy plastic will do. Cut a thin strip, about 2mm wide and then cut a point at one end.

Now stick this to the film plane springs on the back over of the camera so that the point sits in the centre of the red window. It's important to place it on the side shown in the photo or the film may tear. Lower the back onto the camera and check that the plastic point engages with a sprocket hole. If not, reposition the tape and try again.



As the film is wound on, you should be able to hear a click as the plastic rides up and into each sprocket hole. Count 10 clicks for each frame. Now all this is easier said than done, the camera's film advance mechanism is pretty noisy and it takes practice to recognise which noise is the click underneath the click (it's a bit like finding the man behind the man). You may decide not to bother with this refinement, but I think it's worth the effort as it saves film, gives excellent control over what you do and prevents accidental double exposures.

Finally, replace the back. The 35mm canister is a tight squeeze, the back should close but there will be some larger than normal gaps.



So it's time for your trusty black tape to see some action [The crowd rises to its feet in appreciation as Black Tape enters the arena at last]. Make sure you don't forget to tape over the red window very securely!



With that done, it's ready to shoot. You should get around 30 frames of sprocket holed fun out of a 36 exp roll of 135 (i.e. 35mm) film. When you've done, dismantle the camera in total darkness and wind the film back into the canister by hand. So far in my (limited) travels this is the only 127 format camera I've come across that will house a 35mm canister, if you find another, please let the world know about it!
« Last Edit: July 05, 2010, 12:16:36 AM by ed.wenn »

al

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #1 on: July 04, 2010, 11:44:54 PM »
Photos by request, in no particular order...

[Sorry, image deleted during forum software upgrade. Please re-upload if so inclined.]

al

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #2 on: July 04, 2010, 11:47:13 PM »
Another tip, it might be easier to attach the clicker directly to the canister, as shown here:

http://www.matchboxpinhole.com/clicker.html


astrobeck

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #3 on: July 05, 2010, 12:25:48 AM »
Ooooh!  Thanks much for digging that one out of the FW archive cave!

The "clicker" mod alone was worth the dig for me!   :) :)

Ed Wenn

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #4 on: July 05, 2010, 12:56:16 AM »
Al's clever like that.

Miles

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #5 on: July 05, 2010, 08:10:37 AM »

That is exceptionally cool, and the canister based clicker should make it even easier.  I've got some expiered Kodak 200 & 400 I'm going to try with that.

Ed Wenn

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #6 on: July 05, 2010, 01:49:58 PM »
To be fair, the whole concept of breathing new life into 127 format cameras is a great thing. Shame it's not as doable on more of them. Of course, another alternative is to cut 120 film down to size - and I'm sure there are people out there who are doing just that....but this is simpler.

Nigel

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #7 on: July 06, 2010, 02:15:01 PM »
This is definately worth ago. As someone who has built a couple of, Al's design, matchbox pinhole cameras with the film clicker I testify to it's simple, yet very effective design.

Al - have you got a couple of pics you've taken with it to share?
"Imagination is more important than knowledge." Albert Einstein

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Miles

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #8 on: July 10, 2010, 06:13:00 PM »

Just back from the Hospice Fete (They looked after my Mum) and back with a Zeiss Ikon Projector, a Kodak Bullet and 4x colour 35mm expired, all ideal for testing this stuff out.  Might see if the bullet can be modifies for the canister and changed to Sq format. Joy !

Francois

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #9 on: July 10, 2010, 09:37:00 PM »
The bullet is a really gorgeous camera!
I have one in my case and I just love it. Too bad it takes 127...
Francois

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al

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #10 on: August 01, 2010, 02:19:54 AM »
Al - have you got a couple of pics you've taken with it to share?
Better late than never...




Ed Wenn

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #11 on: August 01, 2010, 09:00:06 PM »
Sweet!!

 :)

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #12 on: August 05, 2010, 07:11:10 PM »

Very Cool, loading up an old Tru-Print 200 into the Coronet 4 - 4 now !

Miles

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #13 on: August 05, 2010, 08:03:09 PM »

So ... All made, but can't hear the clicker al all ... grrrr ...

Never mind ... What do we think, how mank cranks per frame ?

al

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Re: 127 to 35mm Conversion (or a Coronet 4-4 Mark II Mod: by Al Cooper)
« Reply #14 on: August 08, 2010, 12:32:54 PM »

So ... All made, but can't hear the clicker al all ... grrrr ...

Never mind ... What do we think, how mank cranks per frame ?

Yeah the camera mechanism is a bit clunky! Hard to hear those clicks.

I just tried a length of scrap film in mine.  At the start of the roll it took me 12 full cranks to wind on a frame.  This is going to decrease as the film gets used.  I'd estimate down to maybe 4 or 5 cranks by the end of the roll?