actual size 16 cm
Thermodynamics, Spectra series
- Parts
- 110
- Build
- 4 hrs 30 min
- Level
- Advanced
actual width 12 cm
Optics, Spectra series
Optical Iris Diaphragm
€36.00
In stock, ships within 2 business days
A copy of the iris diaphragm found in camera lenses, 12 × 12 × 4 cm. The 12 polymer blades slide together as you turn the control ring, and the opening stays round and centred from f/2.8 to f/22. You see what a camera does when you change the aperture.
- Parts
- 68
- Build
- 2 hrs 30 min
- Level
- Intermediate
- Footprint
- 12 × 12 × 4 cm
- Weight
- 185 g
- Glue and battery
- None
Intermediate: several articulated parts
Order today: shipped by Thursday 12 November at the latest.
Free delivery in France on orders from €99.
- Missing part replaced free
- Ships within 2 business days
- 14-day returns
- Illustrated manual included
Ages 14 and up. Contains small parts.
Optical Iris Diaphragm in detail
The story
Like the iris of the eye, a lens diaphragm meters the light coming in. The bladed type, which opens and closes while keeping an almost round aperture, has equipped camera lenses for more than a century. It also sets the depth of field: stopped down, everything is sharp; wide open, the background melts away.
What you'll see move
Turn the ring: the 12 blades slide together and the opening narrows or widens, always centred. This is what a camera does when you change the aperture, here in plain view.
Specifications
- Number of pieces
- 68 pieces
- Assembly time
- 2 hrs 30 min
- Difficulty
- Intermediate
- Dimensions
- 12 × 12 × 4 cm
- Weight
- 185 g
- Material
- PLA with 30% wood fibre
- Hardware
- Micro-screws and ball bearings included
- Glue required
- None
- Battery required
- None
In the box
- 68 wood-fibre composite parts, ready to assemble
- Micro-screws and ball bearings
- Illustrated step-by-step assembly manual
- No glue and no batteries: everything fits together and turns by hand
14+
Ages 14 and up. Contains small parts: not suitable for children under 3, choking hazard.
From the same family
actual size 14 cm
Perpetual Lunar Calendar
€36.00
Astronomy, Spectra series
- Parts
- 88
- Build
- 3 hrs 30 min
- Level
- Intermediate
actual size 18 cm
Sequential Gearbox
€43.20
Power transmission, Spectra series
- Parts
- 130
- Build
- 5 hrs
- Level
- Advanced