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Made the trip to Salt Lake City to meet others in the React community and learn what others developers are doing with React at React Rally 2018. We made the best of our short trip to SLC with checking out the speakeasy within Bodega called The Rest, enjoying some classic video games at the basement barcade, Quarters, and celebrating Oktoberfest a bit early at Snowbird. Enjoy the pictures!
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Within a week my new Semflex OTO 3.5 B (1959) returned from maintenance related to its OREC shutter (see below for details). I could then proceed to the test film with always a certain emotion. I loaded a roll of FOMAPAN 100 that I use most of the time for test films due to its lower cost. FOMAPAN 100 in 120 format is not the same formulation than in 35mm perforated films. The base in 120 is polyester teraphtalate (PET) with blue dye for anti halation. I already noticed some quality problem with 120 rolls of FOMAPAN 100 and here the emulsion is polluted by a myriad of tiny red spots giving a dusty aspect to the negatives.
For all the frames, outdoor and indoor, I used on the SOM Berthiot FLOR 3.5/75mm taking lens, a push-on Semflex hood and the Semflex yellow x2 filter. I protected also the viewing lens with a 42mm FOCA push-on AUV filter. I took the first 8 frames outdoor in my neighborhood by a very clear sunny day. Then completed the last 4 frames indoor using the camera on a tripod and connected (X-sync) to the GODOX Lux Master camera flash. The Lux Master was set at full power with the Godox mini-umbrella LM-S25 soft box.
Light metering was done outdoor with my Minolta Autometer III (1983) and its 10° elective viewer privileging the shadow areas. Indoor, I used my new Konica-Minolta Autometer Vf (2003-2006) for metering the flash exposition with the hemispherical opale integrator. The Autometer Vf is capable a metering both ambiant and flash lights and gives the mix between both.
Smartphone documentary picture
November 4, 2025
69004 Lyon
France
After completion, the film was processed in a Paterson developing tank with a spiral adapted to the 120-format film. 500 mL of Adox Adonal (Agfa Rodinal) developer were prepared at the dilution 1+50 and the film processed for 9 min at 20°C.
Digitizing was made using a Sony A7 camera (ILCE-7, 24MP) held on a Minolta vertical macro stative device and adapted to a Minolta MD Macro lens 1:3.5 f=50mm. The light source was a LED panel (approx. 4x5') CineStill Cine-lite fitted with film holder "Lobster" to maintain flat the film.
The RAW files obtained were inverted within the latest version available of Adobe Lightroom Classic (version 15 of October 2025) and edited to the final jpeg pictures without intermediate file. They are presented either as printed files with frame or the full size JPEG together with some documentary smartphone pictures.
The results show that the Semflex camera behaves correctly giving 12 frames well spaced and exposed. The focusing is exact and the test film reveals no anomalies. The negatives confirm the good conservation state of the SOM Berthiot Flor lens and its reputed sharp definition.
About the camera:
This beautiful French Semflex TLR OTO 3.5 B year 1959 is equipped with a French SOM Berthiot Flor 1:3.5 f=75mm (4 elements of the Tessar type). I got the camera from a neighboring collector in Lyon, France, who is progressively reducing a very large camera collection. He provided already to me my nice FOCAsport II two years ago.
The SEM company ("Société des Etablissements Modernes de Mécanique") was founded in France by Paul Royet in 1946, in the small city of Aurec near Saint-Etienne (Loire) and about 65 km away from Lyon. The SEM camera's were known especially for the TLR’s Semflex that were a great commercial success in France until the 70's (last production 1976). The camera's are constructed around an injected aluminum alloy chassis, very resistant and rigid permitting precise optical alignments. The focusing mechanism is made of a cam system like the Rolleiflex giving an accurate and smooth focusing. SEM constructed their own shutters called « Orec » with 5 leaves capable of the 1/400s to 1s with B.
Semflex received in majority French optics Berthiot with 3 or 4 lenses (Cooke triplet and Tessar type, respectively). Some camera's were also mounted with Pierre Angénieux X1 lenses.
Semflex were trusted TLR camera's used by amateurs and for professional purposes. From 1949 to 1976, 171.000 Semflex were produced in many different types and versions. This OTO 3;5 B, type-30, (1955-199) is the top of the TLR line year 1959. I got the camera with the original SEMFLEX box and the user manual. The accessories include the specific SEM ever-ready leather bag in very good condition, the quite rare quite rare bipolar to PC port flash relay Semflex and a short (10 cm) shutter release cable.
The OTO 3.5 B is covered with a black leather and the metallic parts covered with black enamel. This model has a specific bayonet mount fro lenses accessories but still accepts the push-on normal SEM filter and shade hood.
Strangely, the SEMFLEX’s has no lens caps in a the available list of accessories. I adjusted two black caps of 35mm film canister to protect the two lenses.
The shutter (OREC 1s-1/400s + B) was functional including the slow speeds but has a propension sometimes to open slowly (closure is normal) due likely to a sticky lubricant somewhere. I gave the camera to the same local expert who already maintained my other Semflex 3.5 Standard. The complete cleaning and lubricating was done and the shutter returned in its original specs.
The OTO (or OTOMATIC) series has a coupled film advance to the shutter cocking. The film advance is of the « double-stroke » type (like early Leica M3) with automatic frame counter. I tested successfully the flash synchronization with the GODOX Lux Master electronic flash and its synchro cable connected to the SEM bipolar relay.
Reference : SEM et les SEMFLEX, Patrice-Hervé Pont, FOTOSAGA, 1995.