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Those backs haven't been specifically tested on this camera, but they are likely compatible, yes. However, they are bulky and unbalanced, and thus not recommended. Nonetheless, we'd love to hear from anyone who has tried them on the Stereo 12!

Thanks!

To conceal the fact that I am not human.

@@mercurycamera Alien or robot?

Thanks!

Yes, it does work. You need to "all-perf" mod your back as described in this video, because the perfs on 70mm motion picture print film are not Type 2. As long as you are "all-perfed" you can use that film. It involves a number of challenges in ISO, color filtration, and developing that we will cover at some point in the future.

Yes, absolutely. I don't know if I was clear in the video, but you should do a normal advance after your last photo, and then an EXTRA advance after that. You will then cut this second "frame" in half, so you are absolutely right that it is 2 advances, of which you are using at least 1.5 of as tail for your exposed roll.

Yes! For the ETR (645) system they made an excellent 70mm back. Unfortunately, not for the SQ system.

Unfortunately, Rollei never released a 70mm back for their SL66 system (that I know of). Your best option is to use a film slitter like the following to cut 70mm film (or, what I recommend, 65mm film) down to 120/220 format. You can then run it through your SL66 as 220, and with 65mm film (which has an opaque backing layer called remjet) you don't even need backing paper. You'll waste a little film as leader and tail, but the film is half the price of 120 film, so it is a real bargain, and you get 220 length loads of film. mercuryworks.store/products/65mm-to-120-film-slicer

@@mercurycamera brilliant. I’d like to try that 65mm option. I do have the Mamiya 70mm system I’m trying out now. I’d love to try a Rolleiflex 6001 just for an excuse to get 1 of these backs

Happy shooting! For anyone else interested, the film is available here: mercuryworks.store/collections/film

We have a full list of compatible cameras at www.shoot65mm.com including everything you need to get started! The Mercury Universal Medium Format camera system is the only one that is compatible with hundreds of lenses, for experimenting in the ways you suggest. The Arsat 30mm fisheye lens (P6 mount) is an amazing fisheye for medium format, and would be really cool on 65/70mm film! This can be done with a Mercury, or with the Pentax 645 system and a P6 adapter.

@@mercurycamera Thank you so much

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Hi, there were Linhof cameras with 70 mm film , too. Linhof 220 and aereal-photografic type. Greetings from Heidelberg

@@raim3481 Thanks for your comment! Yes, Linhof was really into 70mm. The Cine Rollex back for large format cameras is a beautiful device, and works just as well today!

This is twice as wide, it wouldn’t fit.

Kodak makes their motion picture film (which is their most advanced film) in both 65mm and (far more commonly) 35mm. The 35mm type can be shot in regular 35mm cameras if you load cassettes yourself. Loading and using 35mm cassettes isn't nearly as nice as the 70mm cassettes I'm showing here, but it can be done with special reloadable cassettes and a "bulk loader" by Kalt or Alden.

Great question! In 65mm reels (Paterson or Jobo 2500 are the two types we make) you can separate the film strips by inserting a wire bent against the reel, to prevent the film from slipping along the groove and overlapping (or of course you can just load a single strip in each reel). You can also develop them in Jobo Expert drums as sheets (this is how we do it). The easiest for most folks, though, is to tray develop them like large format sheets. That costs almost nothing, but needs to be done in the dark. Your idea of a modified SP445 insert is a great one! That would probably be very easy to do. We may look into that.

@@mercurycamera thanks for the developing info, ill look into ordering some suppliers from mercuryworks to get started on shooting and developing cut film. So excited by the innovation and documentation, especially the 3D printed and reversible mods! Thanks so much!

You're very welcome! Yes, easy to get started with BW, or even our color 65mm film developed at home in BW...

Thanks for the comment! I want to clarify a couple of things, though. The 70mm film discussed and shown here is not the same as motion picture 70mm film, which is only used for release prints (print film, not camera film). 70mm film intended for use in cameras is not from the motion picture industry. As described in this video, it was and is made in several different perforation types: unperforated, Type 1 perforated, and Type 2 perforated. None of these is the same as 70mm print film from the motion picture industry. It is only this latter print film that has perforations that match 65mm motion picture camera film. For anyone curious, though, once a Hasselblad has been upgraded as described here, it can indeed shoot all of these formats: 65mm motion picture film, 70mm camera (still photography) film, and 70mm motion picture print film (though this has an extremely low ISO).

The point of this video is that there are many advantages to shooting panoramic film in a cut film holder instead of a 120 6x12 back: a vastly lower cost, less bulk on the camera, less weight, the ability to carry multiple types of film with you and choose which to shoot for any given shot, and the ability to directly shoot 65mm and 70mm film. Another not mentioned is that your shot will be wider than most 6x12 120 backs. So while I assume that anyone watching this video already knows that 6x12 120 backs exist, they probably do not know that it is possible to do what is shown here, or the many advantages over 120 covered in the video.

Yes, or you can do it the way shown in this video, which works great and is necessary sometimes, if you cannot otherwise loosen the lens element. To prevent scratches on your lens barrel (which are only cosmetic, in the worst case) you should wrap blue painter's tape around it before you use a crescent wrench.

Yes, I did forget to mention the darkslide lock. Thanks!

Yes, absolutely! It's easy to get overzealous with the Grafmatic, and the "X" position stops you and reminds you that you have cycled through all of the septums. "Do you really want to keep going?"

Yep, two backs are better than one!

You're welcome! Enjoy the many benefits of long-roll shooting!

Look to see if it will fit.

You're very welcome!

Check out shoot70mm.com/70mm_film.html ("Perforation Types" section) for a direct comparison, including measurements. You probably have Type 2, but this should give you a definite answer!

Thanks!

www.mercurystereo.com