T28

Summary	Main Characteristics	Notes - Related Units
The T28 Macro Flash comes in two versions. Both produce, unlike ring flashes, plastic lighting with shadows to emphasize three dimensional shapes. The T28 Macro Single Flash 1 is an exceptionally small and light unit with a single flash head with a Guide Number of 28m (100 ASA), which can be mounted on the T Power Control 1, or attached to the front of the lens with the Macro Flash Shoe Ring. The T28 Macro Twin Flash 1 has two flash heads which can be attached to the front of the lens with the Macro Flash Ring, and can be used individually, with a Guide Number of 28m (100 ASA), or simultaneously, with a Guide Number of 22m (100 ASA). The second flash head of the T28 Macro Twin Flash 1 can be used as a fill flash to reduce shadows, or to brighten the background. The effect of the second flash head can be changed by bouncing or by using a T32 filter, and judged by operating the built in modelling light.	Two TTL "OTF" Auto flashes specially designed for close-up and macrophotography. Plastic lighting effect is obtained because of the position of the flash head(s) next to the front lens. Guide number is 28m (100 ASA) at peak with one flash head (Single Flash or Twin Flash) or 22m (100 ASA) at peak with two flash heads (Twin Flash). A modelling light in the form of eight electric bulbs are built into the flash heads to facilitate focusing and composition with dark subjects, and to judge the plastic shadow effect. The flash heads can be bounced 70º upward, 45º down and 360º horizontally. When the T28 Macro Single Flash 1 is mounted on the T Power Control 1, Normal Auto mode with three selectable working apertures is available next to TTL "OTF"Auto and Manual operation.	These flash units works in tandem with the T Power Control 1 (containing 4 AA batteries, booster, capacitor, etc.). Having two threads, the Macro Flash Shoe Ring can be screwed into either 49mm ø or 55mm ø lenses. This excludes the manual macro lenses 20mm/F3.5 and 38mm/F3.5. The modelling light is powered by the 6V Power Pack 2 or AC Adapter 3. The filters of the T32 (diffuser, ND, colour filters) can be attached to the flash heads.

Type: Energy-saving, series-circuit type Centralized Control (TTL Auto) flash units with Manual capability. Normal Auto flash mode is avaiable when the T28 Macro Single Flash 1 is mounted on the T Power Control 1.	Electrical connection Flash to T Power Control 1: the spiral cord of the flash has a connecting plug with bayonet mount that plugs into the T Power Control 1. T Power Control 1 to camera: 1) clip-on type with hot shoe and lock 2) bracket type with Power Bounce Grip 2 and TTL Auto Cord T 3) free type with TTL Auto Cord 2 and TTL Auto Connector.
Guide Number: 28m (ASA 100) with one flash head (Single Flash or Twin Flash) or 22m (ASA 100) with two flash heads (Twin Flash).	Calculator Panel: Reversible plate type - blank side for TTL Auto mode on cameras that support TTL flash and calculator side for Manual modes. Available with scale in meters and in feet for 20mm/F2, 38mm/F2.8, 50mm/F3.5, 80mm/F4 and 135mm/F4.5 macro lenses.
Coverage angle: 53° vertical, 74° horizontal.	TTL AUTO Aperture setting: continuous, accords with aperture ring setting of camera-linked lens. Flash confirmation: flash ready and flash OK LED on the T Power Control 1. Viewfinder indication contact provided.
Recycling time: 0.2-10 sec. with AA Alkaline batteries on TTL Auto.	Normal Auto: only available with T28 Macro Single Flash with flash head mounted on T Power Control 1 for lenses used without extension (normal flash photography). Choice of three selectable apertures: F4 (working range 0.9~7m, 100 ASA), F5.6 (working range 0.6~5m, 100 ASA), F8 (working range 0.45~3.5m, 100 ASA).
Flashes per set of AA Alkaline batteries: 100~500 on TTL Auto.	Manual flash guide numbers: Single flash: HI-28 (ASA 100, m) and LOW-14 (ASA 100, m). Twin flash: HI-22 (ASA 100, m) and LOW-9 (ASA 100, m).
Color temperature: 5800°K.	Power Sources: 1) Four 1.5V AA 'penlight' batteries (incl. Ni-Cd batteries) inside T Power Control 1 2) Power Bounce Grip 2 3) F.AC Adapter 3.
Mounting on lens: with Macro Flash Shoe Ring; 49mm and 55mm filter thread mount provided.	Illuminators: Eight electric bulbs are built into the flash heads. Power source: 6V Power Pack 2 or AC Adapter 3.
Mounting on T Power Control 1: only available with T28 Macro Single Flash 1. Allows normal flash photography and additional Normal Auto flash mode.	Dimensions and weight: T28 Macro Single Flash 1: 73x32x50mm, 110g. T28 Macro Twin Flash 1: 73x32x50mm, 210g. T Power Control 1: 81x70x104mm, 320g (without batteries).