5 Frames with a Minolta 16MG and Rollei RPX 25

By Tony Warren

After reading an interesting post from Geoff Chaplin about processing 35mm Rollei RPX 25 in 1:100 Rodinal semi-stand rated at ISO 100 I thought it could be a good match for 16mm. My investigations into various films for 16mm and 110 use have turned up some interesting things. For example, Geoff informs me that RPX 25 is the same film as Rollei 80S so speed must be governed by processing as much as anything else. 80S can be rated between 25 and 100 according to The Massive Development Chart. Another film I have had some success with, Fomapan 400, can be rated anywhere between 100 and 6400 with dev times between 7 and 90 minutes respectively. It is very workable in 16mm at ISO 100 and 7 mins is a civilised development time for an impatient soul. So these mostly surveillance emulsions where many current films seem to take their origins are flexible indeed.

These examples from 11mm x 14mm negatives are very good from a detail and grain point of view. They are all taken around one of my usual stamping grounds, Queen’s Gardens, Dunedin, NZ early on a winter’s afternoon.

The Cenotaph, Queen's Gardens.
The Cenotaph, Queen’s Gardens.

The Cenotaph – some evidence of the slight flare the MG seems prone to.

Detail Queen Victoria's statue.
Detail Queen Victoria’s statue.

One of the flanking bronzes on Queen Victoria’s statue with the Cenotaph beyond.

Detail of the base of the Cenotaph.
Detail of the base of the Cenotaph.
James Macandrew.
James Macandrew.

Bust of an early administrator of the new settlement.

Josephine.
Josephine.

Name plate on a preserved Double Fairlie locomotive, Josephine, on display in the Early Settlers’ Museum.

There was some uneven development apparent on some frames, either a result of stand development itself or combined with leftovers from the pre-soak I used. Some water maybe diluted the edges through clinging to the spiral after draining. Other than that, I have no complaints with the images. I prefer conventional development, however, so I will see how the 80S performs.

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About The Author

By Tony Warren
In my 60 or so years of serious involvement in photography I have seen the demise of the viewfinder, the rise of the SLR and the eclipse of them all with the meteoric development of the digital camera. Through it all, however, and above all else, the image is what it is all about so I now use film alongside digital. Whatever is the most appropriate or practical. My contributions will hopefully be useful for anyone interested in using film and also how a died-in-the-wool antique like me is continuing his life-long addiction in the digital age, using both platforms. The major benefit of an extended retirement is that I can spend most of my time nowadays with photography and writing about it.
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Comments

Bob Janes on 5 Frames with a Minolta 16MG and Rollei RPX 25

Comment posted: 01/10/2024

Excellent results - I don't think I got anything as sharp (or well processed) out of the non-focussing lens on my MG.
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Tony Warren replied:

Comment posted: 01/10/2024

Thanks Bob.

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Geoff Chaplin on 5 Frames with a Minolta 16MG and Rollei RPX 25

Comment posted: 02/10/2024

Good to see you stand develop and the results look excellent given the format. I generally now do "semi-stand" development - two inversions at the half-way point. I'm not convinced it really makes much difference but in principle should even out any imbalances in the developer. I've only had one film out of maybe 100 developed stand or semi-stand which showed unevenness on just three frames on the roll - and I can't think of a reason why. I suspect and leftover fluid from a pre-rinse would get thoroughly mixed in during the initial 20 inversions, but maybe not.
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Tony Warren replied:

Comment posted: 02/10/2024

Actually I do process semi-stand, the same procedure as you describe Geoff, just lazy typing. The unevenness could just be developer not migrating from some points, weakening the action locally. I don't really know and it is not very common anyway.

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Paul Stelter on 5 Frames with a Minolta 16MG and Rollei RPX 25

Comment posted: 02/10/2024

Great article, but I am curious about the film. Is RPX 25 available in Minolta 16 mm cassettes? Or did you slit and re-spool 120 film?
Thanks
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Tony Warren replied:

Comment posted: 02/10/2024

Hi Paul - the film here was slit from 120. I don't think fresh unperforated 16mm is available nowadays.

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Jeffery Luhn on 5 Frames with a Minolta 16MG and Rollei RPX 25

Comment posted: 02/10/2024

Tony,

Beautiful photos! Are you making prints or scanning?
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Tony Warren replied:

Comment posted: 02/10/2024

Thank you Jeffery. I copy my negs with a digital mirrorless and macro set up.

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Alexander Seidler on 5 Frames with a Minolta 16MG and Rollei RPX 25

Comment posted: 05/10/2024

Great shots Tony !
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Tony Warren replied:

Comment posted: 05/10/2024

Thanks Alexander.

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