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I bougth a Rodenstock Depth of field calculator for my work with the graflex cams. I found out that this slide rule is also suitable for the Mamiya, since it also has a bellows focuser. Familiarizing yourself with this device was a bit cumbersome - but in the end I understood how it works. So here is the first photo, with an exactly set depth of field... somehow realy cool! :))
The calculator on Amazon: www.amazon.de/Rodenstock-Tiefenrechner/dp/B0043WQ4M4
Camera: Mamyia RB67 SD
Film: Kodak Ektar 100
Scanner: Epson V850 Pro
Scannersoftware: Silverfast
my new calculator:333 fabulous huh:>
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fun time with Jessie J; Taio Cruz; B.o.B; Far East Moment;.. :">:"> i love you all specially Jessie J:*
Original Odhner Moder 127 with TI-30XllB hand held scientific calculator and K&E 4081-3 LogLog Duplex DeciTrig Slide Rule
Taken for 'Saturday Self Challenge': "Mechanical workings"
The inner workings of a mechanical calculator. Specifically this is a pinwheel mechanism from a Multo calculator, I think dating from the 1950s.
#276
Here is one of my potential Macro Monday captures taken today for the theme this week that is "Back in the Day".
This was my grandfather's calculator he used for work and for doing taxes. Can add, subtract and multiply.
Captured here at f/32, ISO 100 for 30 seconds.
The numbers I entered into the mechanical machine is the 'date' around when these were made.
My contribution to Macro Mondays' challenge, "Pouch", on 14 Sep 2020. It's a well-used HP financial calculator, a relic from my pre-retirement past.
I haven't posted a calculator for a long time ... for those that aren't aware, i've got a museum that showcases the evolution of this technology from the slide rule days to now. This includes HP prototypes and some rare items. I've got a display case in my office that houses the most interesting ones.
The Hewlett Packard 15C was the most powerful of the Voyager series of HP calculators. It was originally produced between 1982 and 1989. It was highly capable for such a small machine, programmable with numeric integration, root solver, matrices and complex maths.
Whilst its financial sibling, the 12C, has remained in continuous production since 1981, the 15C was dropped in favour of the Pioneer series of calculators in 1989.
There was a strong push for HP to re-release the 15C (which could share the same casing and processor as the modern 12C). HP eventually produced a 'Limited Edition' re-release of the 15C in 2011. I thought this would be the last incarnation of the 15C, but no ... the 'Collector's Edition' was released last year (2023). Some subtle differences such as no "Hewlett Packard" writing along the bottom line below they 'f' and 'g' keys. But it's got an amazingly fast processor that would put an original 15C to shame on a complex calculation.
The Lightning Calculator Company of Grand Rapids, Michigan. Manufactured 1900-1925. (For a description: collection.maas.museum/object/372791)
This model belonged to and was well used by my grandfather. Stylus may not be original but has been with the machine since at least the late 1940s. Still works perfectly.
A young girl uses her calculator to add up the families sales for the day outside the family shop in Chinatown, Binondo District, Manila, Philippines.
For WAH who are visiting calculators. I couldn't decide so you get both with this for the daily shot and the other for the 123.
Project "my first..." : CALCULATOR
commodore 797D Solid State
Electronic Calculator
1979
GROUP: MACRO MONDAYS
THEME: BACK IN THE DAY
I have no idea why I'm still hanging on to this calculator, my very first one. I know it has helped me a lot in passing exams that I could have not done with a slide rule!
The calculator that got me through engineering school some 40 years ago. Just like back then, it gives the right answer most of the time.
Father's mechanical calcuator. He was using it in bank. Today is nice reminder. With playing in PS I got this vintage look.
which of these two calculators is over 30yo. i shall give the right answer once we've accumulated enough guesses
For some reason there has been left quite a bit stuff laying around at this building which i find bit odd. Anyways this room was used for storing stuff, all that remains now are empty shelves and graffiti. For more check 80's office building album.
copyright: © FSUBF. All rights reserved. Please do not use this image, or any images from my photostream, without my permission.
Some believe Stonehenge to be an ancient eclipse calculator. The number of blue stones and Aubrey holes are a clue
www.astronoo.com/en/articles/eclipse-saros-cycle.html
www.math.nus.edu.sg/aslaksen/gem-projects/hm/0102-1-stone...
The stones may also represent scale models of mother earth and the moon
www.constructingtheuniverse.com/US%20Paper%20Earth%20Moon...