Скачать или смотреть Rollei INFRARED 4x5 Large Format Film – IR 720 Filter – Toyo Field 45A – Fujinon NSWD 65mm f5.6 lens

The only infrared film available today in 4x5 sheet film large format is Rollei INFRARED which is an aerial surveillance film with "extended red sensitivity". Ilford SFX 200 film also has extended red sensitivity but is only made in 35mm and 120 roll film, not 4x5 sheet film. Neither film extends deep into infrared and a 720nm filter is about the best to use, it's deep red but not completely opaque to visible light. Deeper infrared filters like 760nm block more visible light and may still make an imager and the deepest 950nm filters completely blocks all visible and the near infrared light the film is sensitive to and will not make an image at all.

Rollei INFRARED has an ISO* rating of 400 in visible light. Its rating for infrared depends on the filter being used and conditions (attitude and longitude, altitude, season, weather) and needs to be determined by practical test but generally ISO 6 is a good place to start: that is, set your hand-held light meter to ISO 6, put your 720nm filter on the lens and take incident readings. Bracketing will help while you''re sorting the exposure out. Stick with one filter and one developer.

Equipment used:

Toyo Field 45A large format 4x5 camera
Fujinon NSWD 65mm f5.6 lens in 21mm recessed lens board
Camdiox IR 720 filter
Innorel RT80C tripod with bowl leveller and QR panoramic clamp
Yeud tripod stone bag
Lailu focussing cloth
eTone cable release
Peak 4x loupe
Gossen Luna-Pro SBC light meter
Fidelity Elite 4x5 film holder
Lowepro Flipside 300 backpack
Lowepro Passport Sling II

RØDE Wireless GO II microphone
GoPro Hero 11 Black
Samsung EVO Plus 128GB microSD card

Rollei INFRARED 4x5 film
Kodak HC-110 developer
Ilford Ilfostop
Ilford Rapid Fixer
Ilford Ilfotol wetting agent
JOBO 2520 tank and JOBO 2509N reel
JOBO SilverBase compact rotary film processor

Apple Mac Studio M2
Viewfinder Mark II
Adobe Lightroom Classic 14.3
Negative Lab Pro 3.0
Adobe Premiere Pro 25.2.3

ISO ratings are made using calibrated and standardised light sources, developed using a specified agent to a specified contrast, and based on a specified density above base+fog. It's possible to achieve higher film sensitivities using non-standard developing agents, developing to non-standard contrast, measuring at non-standard densities... you get the idea. Such a non-ISO-standard speed rating should be referred to as an Exposure Index (EI) which is why films like Kodak Tmax 3200 and Ilford Delta 3200 have ISO ratings of 800 and 100 respectively but can be exposed at an EI up to 3200 and produce acceptable results (depending on how you define "acceptable" of course).