Q2 - If you add a 1.4x multiplier to a lens, what happens to the maximum aperture?

It's decreased by 1.4 f stops
It's decreased by 1 stop
It doesn't change

Q3 - When used at 1:1 magnification (life size) how does the depth of field of a 50mm lens compare with that of a 100mm lens?

They are the same
The 50mm lens will have twice the DOF of the 100mm lens
The 50mm lens will have half the DOF of the 100mm lens

Q4 - When Straight lines near the edges of an image bend inwards, what type of distortion is this?

Pincushion distortion
Barrel distortion
Complex distortion

Q5 - Which type of aberration can affect sharpness in the center of an image?

Coma
Astigmatism
Spherical aberration

Q6 - There are two type of chromatic aberration, Lateral and Lonitudinal (Axial). Which of the following statements is true"

Both are reduced by stopping down
Only longitudinal (axial) CA is reduced by stopping down
Only lateral CA is reduced by stopping down

Q7 - When taking pictures of the stars, which of these lenses will record the faintest stars for a given exposure time and ISO setting?

50mm f2.0
400mm f5.6
200mm f4

Q8 - Shooting with a macro lens at 1:1 magnification (life size) how is the depth of field distributed?

Evenly about the focus point
Twice as much DOF behind the focus point as in front of it
Twice as much DOF in front of the focus point as behind it

Q9 - If you had a perfect ("diffraction limited") 300mm f2 lens, what aperture should give the sharpest images?

Stopped down to around f4
Wide open at f2
Stopped down to around f8

Q10 - What is the characteristic an Apochromatic (APO) lens?

It brings two widely seperated wavelengths of light (colors) to the same focus
It brings two widely seperated wavelengths of light (colors) to the same focus and corrects for spherical aberration at two wavelengths
It brings three widely seperated wavelengths of light (colors) to the same focus and corrects for spherical aberration at two wavelengths

Note that any question left blank will count as incorrect answers in your final score