Modern Classic SLRs Series: Pentax SF-10
Full Technical Specifications
The Pentax SF-10 (known as the SF1 in some regions) marks Pentax’s entry into the autofocus SLR market in 1987. Combining a robust K-mount system with early autofocus technology, it’s a bridge between manual-focus classics and modern automation. Below are its detailed specifications, perfect for enthusiasts and collectors exploring film photography history.
General Specifications
- Camera Type: 35mm single-lens reflex (SLR) with TTL autofocus and focal-plane shutter.
- Film Format: 24mm x 36mm (standard 35mm).
- Release Date: 1987.
- Manufacturer: Asahi Pentax, Japan.
Lens and Mount
- Lens Mount: Pentax KAF bayonet mount (supports K, KA, and KAF lenses).
- Compatible Lenses:
- Pentax KAF autofocus lenses (full functionality).
- Pentax K and KA manual lenses (manual focus, stop-down metering with K lenses).
- 42mm screw-mount lenses (with adapter, stop-down metering).
- Depth-of-Field Preview: Available via lens stop-down lever (on compatible lenses).
Shutter and Exposure
- Shutter Type: Electronically controlled vertical-run focal-plane shutter.
- Shutter Speeds:
- Program/Aperture Priority: 1/2000 sec to 1 sec (stepless).
- Manual: 1/2000 sec to 1 sec (1-stop increments).
- Bulb: For long exposures.
- Mechanical: 1/100 sec (battery-independent).
- Exposure Metering: TTL open-aperture metering with silicon photocell (SPC).
- Range: EV 1 to EV 19 (ISO 100, 50mm f/1.4 lens).
- Pattern: Center-weighted average.
- Exposure Modes:
- Program AE (normal and high-speed action programs).
- Aperture Priority AE.
- Manual (with LED guidance).
- TTL Auto Flash.
- Exposure Compensation: ±2 EV (1/2-stop increments).
- Film Speed: ISO 25-5000 (DX-coded), ISO 12-3200 (manual).
Autofocus and Viewfinder
- Autofocus System: TTL phase-matching SAFOX (Sensor Ability Focusing Optical eXchange).
- Modes: Single AF (AF.S), manual focus.
- Sensitivity: EV 2 to EV 18 (ISO 100).
- Focus Lock: Via shutter half-press.
- Viewfinder: Pentaprism with 92% coverage, 0.81x magnification (50mm lens at infinity).
- Focusing Screen: Fixed Natural-Bright-Matte with split-image and microprism aids.
- Display: LEDs for shutter speed, aperture (via lens window), flash status, focus confirmation, exposure compensation.
Film Handling
- Film Advance: Manual single-stroke lever (130° throw, 30° standoff).
- Film Rewind: Built-in motor, auto-stop, manual rewind button.
- Frame Counter: Additive, resets on back opening.
- Multiple Exposures: Enabled via dedicated switch.
Flash
- Sync Speed: 1/100 sec.
- Flash Control: TTL auto flash with Pentax AF-series units (e.g., AF280T).
- Hot Shoe: X-sync contact with dedicated flash pins.
Power and Build
- Power Source: Two 3V CR-123A lithium batteries.
- Battery Check: LED indicator in viewfinder.
- Body Material: Polycarbonate with metal lens mount and chassis.
- Dimensions: 152mm (W) x 99mm (H) x 63mm (D).
- Weight: 665g (body only, no batteries).
Additional Features
- Self-Timer: 12-second delay (LED and audible signals).
- Optional Accessories: Pentax Data Back SF1, winder, grips.
- Tripod Mount: 1/4-inch standard thread.
| Brand | Pentax |
|---|---|
| Model | SF-10 |
| Type | Reflex |
| Film | 35 mm |
| Picture Size | 24x36mm |
| Weight | 665 gr |
| Marketed | 1987 |
| Price | |
| Lens | 50 mm |
| Focusing | |
| Shutter | |
| Base Sensitivity | |
| Battery | 2x3 v |
| Functions | |
| Color | Black |
| Filter | n/a |
| Dimentions | |
| Weather resistence | No |
| Memory | n/a |
| Adaptable lenses | |
| Description | |
| Youtube |
