Photo Lenses FAQ

Compatibility: Are Tamron lenses for Nikon compatible with Nikon cameras? Are Tamron lenses for Canon compatible with Canon cameras? Are Tamron lenses for Sony compatible with Sony cameras? Are Tamron lenses for Pentax compatible with Pentax cameras? Are film SLR camera lenses compatible with digital SLR cameras?
Shooting: Images shot at close distance have a wider angle of view. Is this a malfunction? When I use a macro lens (60mm, 90mm, 180mm etc.), the maximum aperture value displayed on the camera is smaller than designated on the lens. Is this abnormal? When I point an all-in-one zoom lens (18-270mm, 28-300mm etc.) downwards, the lens barrel extends. What should I do? Flaws (dusts or blemishes or shadows) are appearing on my photos. Are they caused by the lens?
VC: Is it possible to use the Vibration Compensation (VC) mechanism when the camera is fixed on a tripod? The display in the viewfinder shakes when I start or end the Vibration Compensation (VC) mechanism. Is this abnormal? Can the Vibration Compensation (VC) mechanism be used for panning?
Names: What is the difference between the N and NII for Nikon mount models? Is there a difference between the "Macro" written on macro lenses (60mm, 90mm, 180mm etc.) and the "Macro" written on zoom lenses?
Repairs and Maintenance: The product is in poor condition (broken or needs to be cleaned). What should I do? Can I replace a lens mount for one camera maker with a lens mount for another camera maker?

FAQs (Frequently Asked Questions)

The display in the viewfinder shakes when I start or end the Vibration Compensation (VC) mechanism. Is this abnormal?: The phenomenon of the display shaking when VC starts and ends is a normal part of VC's operation and is therefore not abnormal.
The VC mechanism in lenses for Nikon and Canon cameras uses a shift method that moves part of the optical system parallel to the image plane. When the VC mechanism is switched off, the VC lens element that compensates for vibration is locked in the center of the optical system. When the VC switch is turned on and the camera's shutter button is pressed halfway down, the lock is released, allowing Vibration Compensation to start. When the shutter button is released and not pressed again for a set time period, the lens decides that shooting has ended and locks the VC lens to stop Vibration Compensation.This locking mechanism uses a lock/release method to control the rotations of the VC lens when the lock is turned on/off. The display in the viewfinder shakes when the lock is turned on/off, because the rotation axis of the drive mechanism (VC actuator) that turns the lock on/off is not necessarily the same as the optical axis of the VC lens.