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)

Images shot at close distance have a wider angle of view. Is this a malfunction?: No, this is not a malfunction as the focal length is specified at an infinite shooting distance and its angle of view (AOV) at an infinite distance is the same as other lenses.
AOV at closer distance depends on the mechanical focus design of the lens. An IF (Internal Focus) lens tends to give a wider AOV.