A lens component configured to be selectively attachable to a device near an onboard camera lens of the device, the lens component comprising: a retainer portion comprising two sidewalls forming a channel, the distance between the sidewalls generally corresponding to, or being generally complementary to, the thickness of a portion of a corner area of the device over which the retainer portion is configured to fit, the retainer portion further comprising a wall extending between the sidewalls; and at least one of a lens attached to the retainer portion, or a lens attachment portion for receiving a removably attachable lens; at least a first sidewall of the two sidewalls comprises a material that is sufficiently flexible to permit deformation of the first sidewall, so that the channel can be temporarily widened while sliding the lens component onto a communication device, and wherein at least a portion of the first sidewall is sufficiently resilient to produce a restoring force to retain the lens component on the communication device during use; characterised in that: the device is a communication device; and the lens component is attachable in a corner region of the communication device, the retainer being adapted to receive a single corner of the communication device; and the wall extending between the sidewalls extends along two generally orthogonal directions such that, in use, said wall contacts the communication device along two generally orthogonal edges of the corner of the communication device. a retainer portion comprising two sidewalls forming a channel, the distance between the sidewalls generally corresponding to, or being generally complementary to, the thickness of a portion of a corner area of the device over which the retainer portion is configured to fit, the retainer portion further comprising a wall extending between the sidewalls; and at least one of a lens attached to the retainer portion, or a lens attachment portion for receiving a removably attachable lens; at least a first sidewall of the two sidewalls comprises a material that is sufficiently flexible to permit deformation of the first sidewall, so that the channel can be temporarily widened while sliding the lens component onto a communication device, and wherein at least a portion of the first sidewall is sufficiently resilient to produce a restoring force to retain the lens component on the communication device during use; characterised in that: the device is a communication device; and the lens component is attachable in a corner region of the communication device, the retainer being adapted to receive a single corner of the communication device; and the wall extending between the sidewalls extends along two generally orthogonal directions such that, in use, said wall contacts the communication device along two generally orthogonal edges of the corner of the communication device. the device is a communication device; and the lens component is attachable in a corner region of the communication device, the retainer being adapted to receive a single corner of the communication device; and the wall extending between the sidewalls extends along two generally orthogonal directions such that, in use, said wall contacts the communication device along two generally orthogonal edges of the corner of the communication device.