70mm Film FUN up ahead

[The_Darkness]

Hello!

Here are a few images of my prototype 70mm daylight tank. It is the perfect diameter for the large 5m reels and it will take two! I used a 316 stainless steel lab grade locking container and a 35mm daylight cap. I had my buddy cut the hole and TIG weld the cap onto the main lid. He said that it shouldn't rust since he used a SS welding rod.

The lid has a thick heavy duty replaceable gasket. I'm going to try and burn through the remainder of the film I have left and develop it this weekend. I'm going to work on getting a spacer 3D printed when developing only one reel, but if you have a second reel, that can act as a spacer. My buddy said that he'll do more if people want one.

 

[BernardL]

@ The_Darkness : Great underwater pictures !

 

[Sarcophilus Harrisii]

It's been a while since I added any images to this thread. 70mm has slowed down for me these last few months, due to my Hasselblad Magazine 70 having a persistent and annoying light leak which, to date, has defied my efforts to pinpoint and eliminate it, despite trying a couple of remedies. Nevertheless I have loaded it again (with some Kodak Plus-X, this time) and will no doubt run some more film through it with the aid of a bit of black tape, as part of my ongoing attempts to cure the problem. In the meantime, here is an image of Hobart's Art Deco T. & G. Building from 1938, which I made a few months ago from a vantage point in the adjacent Centrepoint Car Park.



https://www.flickr.com/photos/tasman...in/dateposted/

Camera: Hasselblad 500C/M SLR.
Lens: Carl Zeiss 150mm Sonnar f/4.
Film: Agfa Aviphot 200 ("Rollei 400 Professional") 70 millimetre black & white negative.
Development: Agfa Rodinal 1:50 20C/16m.
Cropped to 645 ratio from 70mm 6x6 negative frame.

(For those who might be interested, basic details about Australia's former Temperance & General Mutual Life Assurance Society Ltd and their predilection for constructing landmark buildings around Australia may be obtained from here.)

My thanks and sincere appreciation go to Dan (aka Nokton 48) for his ongoing encouragement and support of my interest in the 70mm film format.

 

[Nokton48]

Looks good Brett! Keep going with it. Rodinal seems to do the trick.

-Dan

 

[Nokton48]

My stash of 70mm 24 exp rolls 05 2022 by Nokton48, on Flickr

My plan for this shooting year, Plus-X Pan (the original stuff), Kodak WL Surveillance Film, Agfa Aviphot 200 (Rollei 400s), and HP5 Plus. The Aviphot and the HP5+ are fresh film. I shoot a lot of expired film too, no real differences.

I have collected, cleaned and dusted, added blue tape, to my remaining stock of Kodak 70mm Cartridges. All of these cartridges are complete, including the silver inner clip. It is important that the film go completely into the exposed cartridge, without damaging the film transport. My plan is to load 24 exposures including header and leader, which I can develop on a Unicolor Uniroller, using my JOBO 2500 with modified 120 reels, or my Patterson which holds two 24 exp 70mm modifed reels. I bought up, cleaned up, and modified another Unicolor Uniroller, this one has continuous one way rotation.

 

[Kai-san]

It's been a while since I added any images to this thread. 70mm has slowed down for me these last few months, due to my Hasselblad Magazine 70 having a persistent and annoying light leak which, to date, has defied my efforts to pinpoint and eliminate it, despite trying a couple of remedies. Nevertheless I have loaded it again (with some Kodak Plus-X, this time) and will no doubt run some more film through it with the aid of a bit of black tape, as part of my ongoing attempts to cure the problem. In the meantime, here is an image of Hobart's Art Deco T. & G. Building from 1938, which I made a few months ago from a vantage point in the adjacent Centrepoint Car Park.


Camera: Hasselblad 500C/M SLR.
Lens: Carl Zeiss 150mm Sonnar f/4.
Film: Agfa Aviphot 200 ("Rollei 400 Professional") 70 millimetre black & white negative.
Development: Agfa Rodinal 1:50 20C/16m.
Cropped to 645 ratio from 70mm 6x6 negative frame.

(For those who might be interested, basic details about Australia's former Temperance & General Mutual Life Assurance Society Ltd and their predilection for constructing landmark buildings around Australia may be obtained from here.)

My thanks and sincere appreciation go to Dan (aka Nokton 48) for his ongoing encouragement and support of my interest in the 70mm film format.

Brett, that's a very nice shot! May I ask what ISO setting you are using for this film?

 

[Sarcophilus Harrisii]

Brett, that's a very nice shot! May I ask what ISO setting you are using for this film?

That's very kind of you to say. Thank you.

It's worth noting that, (to the best of my knowledge), this film, being originally coated for photoreconnaissance purposes, was never classified according ISO 6: 1993 which covers film for pictorial imaging. Quite how Maco arrived at a speed of "400" for it, I do not know, but I suspect they used some poetic licence, to say the least.

Hence, when I first tried the film I bracketed several frames at various exposure indices from 50 to 200, initially. Earlier in this thread Cal had shared some decent results at around EI 100 from memory including some developed in Rodinal. I felt the frames I exposed at EI 100 also looked best, overall so it 's what I've settled on.

I should add for clarity that (with occasional exceptions) I usually take incident readings with an accurate Minolta Auto Meter III—although I routinely interpret these, according to both the scene lighting and the fact that most BW images will benefit from a bit of additional exposure for the shadows, over and above a simple incident reading biased towards protecting transparency highlights from blowing out. Thus, a "true" EI for uninterpreted incident, or reflective metering may be closer to EI 50–64 perhaps.

My dilution and dev times listed are accurate, of course—additionally the film is processed in a twin (135) reel Paterson tank using a modified standard Paterson reel spaced out to the optimum width for the wider 70mm film base, with standard 30 seconds initial inversions, followed by ten seconds per minute for the remainder of development.

I try to keep my Flickr images fairly organised in terms of tagging, capture details and processing data for black and white photos. Thus, you'll find any photos I have made with this film in my 70mm album—including a few developed with ID-11 instead of Rodinal.
Cheers,
Brett

 

[Kai-san]

Thanks Brett! The haphazard ISO rating reminds me of another Rollei film, the Retro 400S. I ruined a few rolls before I realized that ISO 200 was closer to the truth. In addition I used Xtol developer, and no matter how I changed the developing time it just turned out extremely contrasty and dark. Switching to Rodinal fixed the problem.

 

[Sarcophilus Harrisii]

Thanks Brett! The haphazard ISO rating reminds me of another Rollei film, the Retro 400S. I ruined a few rolls before I realized that ISO 200 was closer to the truth. In addition I used Xtol developer, and no matter how I changed the developing time it just turned out extremely contrasty and dark. Switching to Rodinal fixed the problem.

I believe Maco's 120 format Rollei Retro 400S and their Rollei 400 Professional 70mm (no longer available) are the same emulsion. There may be some discussion on the point earlier in this thread (it's covered a lot of ground over 74 pages of posts, I am not sure, now). Therefore, your earlier results from the Retro 400S are what I'd also expect, if I shot that film at EI 400.

 

[Nokton48]

Searching around on Youtube, I found two interesting Hasselblad A70 videos. One on loading the A70 70mm Film Magazine, and the other, on using Patterson spiral reels to develop 70mm film.
See Here:

(193) Loading 70mm film into a Hasselblad A70 filmback - YouTube

(193) Loading 70mm film onto standard developing spirals - YouTube


And here is their blog, two interesting sessions regarding 70mm Aerographic film;

VA Classic cameras

 

[Nokton48]

Here is a Youtube (in a foreign language) on how to load the 500 exposure Hasselblad 70mm A500 Film Back. I previously bought one of these, it had serious film counter problems, so I was lucky to get my money back. I do have three 100 foot Nikor 70mm Film Tanks. They are humungeous LOL

(193) How to Use and Load Film on a Hasselblad A70/500 film back - YouTube

 

[Sarcophilus Harrisii]

Here is a Youtube (in a foreign language) on how to load the 500 exposure Hasselblad 70mm A500 Film Back.

See here:

(193) How to Use and Load Film on a Hasselblad A70/500 film back - YouTube

Brilliant! Thanks for that.
Will there be another 500 exposure magazine coming your way, Dan?
Cheers,
Brett

 

[Kai-san]

Anybody here using the Mamiya RB67 film back for 70mm? I have problems with mine; when I advance the film after loading the cartridge the counter does not stop at 1. If I stop winding at 1, take a picture and then advance the film, it might stop at 2. Next time it might jump to 4. And the spacing is all over the place, a lot of film wasted.
Luckily I've got the A70 magazine for my Hasselblad, that works flawlessly.

As for "user manuals", I found this site in the UK: https://vaclassiccameras.co.uk/

Here's a video on loading the A70 back: https://youtu.be/0mgenxF65_E

Here's a video on using a standard dev. spiral for 70mm, I found this one worked better for me than the one shown on this thread: https://youtu.be/YMrw8zFOYpU

 

[Nokton48]

Brilliant! Thanks for that.
Will there be another 500 exposure magazine coming your way, Dan?
Cheers,
Brett

Hello Brett,
I plan to stay with my four regular A70 backs for a good while. They are cheap and plentiful, I have bought bad ones, and good ones too. If a Magazine 500 came along in good condition fully functioning (at a decent price) I would be very tempted. The ratrod example at Leicashop is missing some original parts, no real way to know if it's functional. So Thank You Kindly, but I will wait.

My new Hasselblad A500 magazine by Nokton48, on Flickr

This one I bought had a counter gone completely wonky and wrong. Finally got I $$$ back it was an ordeal. Ebay finally inceded.

Shown on my 500EL/M with customized stovepipe (I wear eyeglasses), 40mm T* Distagon, Zeiss K2 Filter 104mm, and the "Rubber Tyre" solid very hefty rubber honker 40mm lenshade. The rubber material around the eyepiece, is "Anniversary Diamond Rubber", purchased in large sheets, during a friend's visit to the Rollei factory in Germany. It was intended to cover the anniversary models of the Rollei SL66.

 

[Nokton48]

Hasselblad Magazine 70 100 200 by Nokton48, on Flickr

Instruction sheet for the Hasselblad Magazine 70 100/200. The rarest of rare A70 Magazines, it has film counter to 200. What few realize, is that the standard A70 will function beyond 70 exposures, you simply lose the frame counter after 70 exposures. So, if you use thinner emulsions (see the chart near bottom right), with less film thickness, you can shoot up to 200 exposures in a standard A70. For example, I have a 500 foot roll of Plus-X Aerographic Recon Film, that is delicate and kinks easily, thinnest emulsion ever I'd wager. It behaves like classic Plus-X with interesting tonality.

I'm sticking with four reg A70 backs, they do everything I need to do. Anybody who can find a 100/200 Magazine is a lucky Blad Collector indeed.

 

[Richard G]

Great to see these instructions. There is a more common 70 back in a store near me. Thinking I will get it. Are the instructions for the common one much the same? What should I look out for with buying such a back?

 

[Nokton48]

Magazine 70 Instructions 1 by Nokton48, on Flickr

Magazine 70 Instructions 2 by Nokton48, on Flickr

Magazine 70 Instructions 3 by Nokton48, on Flickr

Magazine 70 Instructions 4 by Nokton48, on Flickr

From "The Hasselblad Way" Fifth Edition F. Freytag

 

[Nokton48]

RichardG,

Most important is ability to return it if it's not working properly. I'd spend another fifteen bucks, and replace the original light trap. Dick Werner sells them on Ebay and it's a ten minute changeout. Put it through all it's paces (acquire some old color stock for making dummy rolls to practice loading, etc). Like anything else PRACTICE it's not tough at all.

Do you want to shoot long rolls, or short ends? I have standardized on 24 exposures, fits my Patterson and JOBO tanks. If I want fifteen feet I use my 70mm Kindermann Tank.

 

[Richard G]

Great. Thanks for the info and advice. Fun ahead indeed.

 

[Nokton48]

120 Respooled 70mm Plus-X Aero 2402 Nik N Trik by Nokton48, on Flickr

This is a 120 roll of slit and re-spooled 70mm Kodak Plus-X Aerographic Fim 2402. I purchased five rolls from "Nik N Trik" in the UK, so loaded it into a Plaubel Makina 6x9cm roll back. Shot with Plaubel Makiflex with 270mm f5.5 Schneider Tele-Xenar in barrel. Film loaded into System 5 Paterson Tank with two 70mm reels, plus room for a roll of 35mm. D23 1:1 twelve miniutes at 68F.

The are some VERY fine negatives. The tonality is among the best, having processed many different types of 120 B&W recently. In fact, I am buying more 2402 Aerographic. I just received four rolls, each 40 feet of 2402. Cost was $150 for 160 feet total, I'm OK with that. Into the deep freeze it will go.

Need to find time to do a lot of printing!

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