Near-IR Photography Session 2
A second session of "Near-IR" photography after the test one. Lyon, France, August 22, 2023.
Using a super-panchromatic film with an extended sensitivity in the red band and the very beginning ("near-infra red") of the infra-red domain, it would be possible to get special effects closed to infra-red photography.
I selected here a Rollei Retro 400S (Agfa Aviphot 400) originally used in aerial photography for its capacity to differentiate green tones and to clear in part the atmospheric haze. The Agfa Aviphot sensivity curve starts to decrease at 670 nm to fall at zero around 820 nm. The band starting at 780 (up to 2500nm) is called the "near infra-red" band.
The 36-exposure film was loaded in my Minolta X-500 SLR camera (year 1984) fitted with a normal lens Minolta MD 1:1.2 f=50mm.The lens was equipped with a 55mm screw-on IR filter with a cutoff at 720nm. Since the filter is so dark for a comfortable through-the-lens viewing, a FOCA "Universel" external view finder was used for an easy framing.
After the test film, the whole film was exposed this time only for 25 ISO using my Minolta Autometer III external light meter equipped with a selective 10° finder. The X-500 light metering system has not been used and was the camera was used in the manual mode using the exposure times typically of 1/125s or 1/60s and f/5.6 to 8.
Expositions were done in the morning between 10 and 12 am by a hot and bright sunny day.
Jardin Botanique de Lyon, August 22, 2023
Parc de la Tête d'Or
69006 Lyon
France
After completion, the film was processed using Adox Adonal developer (equivalent to Agfa Rodinal) at dilution 1+25, 20°C for 10min30. The film was then digitalized using a Sony A7 body fitted to a Minolta Slide Duplicator installed on a Minolta Auto Bellows III with a lens Minolta Bellow Macro Rokkor 50mm f/3.5. The RAW files obtained were then processed without intermediate files in LR and edited to the final jpeg pictures.
All frames of the film are presented in the dedicated album either in the printed framed versions and unframed full-size jpeg accompanied by some documentary smartphone Vivo Y76 color pictures.
About the camera and the lens :
Minolta X-500 SLR was manufactured in Japan and released in 1983, two years after the famous X-700. Minolta X-500 was considered sometime as a more rational camera than X-700 without the contested "Program" P mode, and a more useful viewer displaying the manually selected shutter time plus the recommended one in the manual mode.
I bought this X-500 brand-new in my native city (in Blois, France) in 1984 from a trusted camera shop with three brand -new MD lenses : the MD 1:2 f=85mm, MD 1:2.8 f=20mm and a MD 1:2.8 f=35mm that are still in my lenses collection. The MD 1:1.2 f=50mm was purchased as a vintage lens on line in the mid 2010's.
Near-IR Photography Session 2
A second session of "Near-IR" photography after the test one. Lyon, France, August 22, 2023.
Using a super-panchromatic film with an extended sensitivity in the red band and the very beginning ("near-infra red") of the infra-red domain, it would be possible to get special effects closed to infra-red photography.
I selected here a Rollei Retro 400S (Agfa Aviphot 400) originally used in aerial photography for its capacity to differentiate green tones and to clear in part the atmospheric haze. The Agfa Aviphot sensivity curve starts to decrease at 670 nm to fall at zero around 820 nm. The band starting at 780 (up to 2500nm) is called the "near infra-red" band.
The 36-exposure film was loaded in my Minolta X-500 SLR camera (year 1984) fitted with a normal lens Minolta MD 1:1.2 f=50mm.The lens was equipped with a 55mm screw-on IR filter with a cutoff at 720nm. Since the filter is so dark for a comfortable through-the-lens viewing, a FOCA "Universel" external view finder was used for an easy framing.
After the test film, the whole film was exposed this time only for 25 ISO using my Minolta Autometer III external light meter equipped with a selective 10° finder. The X-500 light metering system has not been used and was the camera was used in the manual mode using the exposure times typically of 1/125s or 1/60s and f/5.6 to 8.
Expositions were done in the morning between 10 and 12 am by a hot and bright sunny day.
Jardin Botanique de Lyon, August 22, 2023
Parc de la Tête d'Or
69006 Lyon
France
After completion, the film was processed using Adox Adonal developer (equivalent to Agfa Rodinal) at dilution 1+25, 20°C for 10min30. The film was then digitalized using a Sony A7 body fitted to a Minolta Slide Duplicator installed on a Minolta Auto Bellows III with a lens Minolta Bellow Macro Rokkor 50mm f/3.5. The RAW files obtained were then processed without intermediate files in LR and edited to the final jpeg pictures.
All frames of the film are presented in the dedicated album either in the printed framed versions and unframed full-size jpeg accompanied by some documentary smartphone Vivo Y76 color pictures.
About the camera and the lens :
Minolta X-500 SLR was manufactured in Japan and released in 1983, two years after the famous X-700. Minolta X-500 was considered sometime as a more rational camera than X-700 without the contested "Program" P mode, and a more useful viewer displaying the manually selected shutter time plus the recommended one in the manual mode.
I bought this X-500 brand-new in my native city (in Blois, France) in 1984 from a trusted camera shop with three brand -new MD lenses : the MD 1:2 f=85mm, MD 1:2.8 f=20mm and a MD 1:2.8 f=35mm that are still in my lenses collection. The MD 1:1.2 f=50mm was purchased as a vintage lens on line in the mid 2010's.