Manuals for Camera Lenses
Below you can find all brands of Camera Lenses for which we have manuals available. Click on your brand for a list of all models. Also view the frequenty asked questions at the bottom of the page for useful tips about your product. Is your brand not on the list? Please contact us.
Is your product defective and the manual offers no solution? Go to a Repair Café for free repair services.
- Altura Photo
- Canon
- Fujifilm
- Imperii Electronics
- Lensbaby
- Nikon
- Olympus
- Panasonic
- Samsung
- Sigma
- Sirui
- Sony
- Tokina
- Zeiss
Frequently Asked Questions
Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.
What does the "f" stand for with camera lenses? Verified
The f-ratio stands for the reciprocal of the relative aperture. This is the ratio of the system's focal length to the diameter of the entrance pupil. A higher f-ratio means a smaller entrance and thus less light coming into the lens.
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