Derivation of Equivalent Focal Length of two lens in contact optics @Kamaldheeriya Maths easy #education #learning #educator #studygram | In this video learn Derivation of Equivalent Focal Length of Combination of two
![Table of Equivalent Focal Lengths for APS-C sensor: Beginners Questions Forum: Digital Photography Review Table of Equivalent Focal Lengths for APS-C sensor: Beginners Questions Forum: Digital Photography Review](https://3.img-dpreview.com/files/g/TS560x560~2182310.jpg)
Table of Equivalent Focal Lengths for APS-C sensor: Beginners Questions Forum: Digital Photography Review
How do we find the equivalent of 2x, 3x, etc. in terms of the focal length of a camera lens? - Quora
![For the lens arrangement shown below, the focal length of equivalent system is in the form of 50x13 . Find the value of x.[Radii of curvature, focal lengths and refractive indices are For the lens arrangement shown below, the focal length of equivalent system is in the form of 50x13 . Find the value of x.[Radii of curvature, focal lengths and refractive indices are](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1094588/original_16.png)
For the lens arrangement shown below, the focal length of equivalent system is in the form of 50x13 . Find the value of x.[Radii of curvature, focal lengths and refractive indices are
![Oppo shows off its next-generation optical zoom camera module with 85-135mm equivalent focal length: Digital Photography Review Oppo shows off its next-generation optical zoom camera module with 85-135mm equivalent focal length: Digital Photography Review](https://www.dpreview.com/files/p/articles/7666573079/OPPO_announces_a_new_generation_of_hybrid_light_transformation_technology__step-by-step_zoom-drive_image_future__OPPO_China_-2020-08-19-12.52.53.jpeg)
Oppo shows off its next-generation optical zoom camera module with 85-135mm equivalent focal length: Digital Photography Review
![optics - How to determine the focal length of a lens that is equivalent to two lenses? - Physics Stack Exchange optics - How to determine the focal length of a lens that is equivalent to two lenses? - Physics Stack Exchange](https://i.stack.imgur.com/ft0ue.png)
optics - How to determine the focal length of a lens that is equivalent to two lenses? - Physics Stack Exchange
![6. Define focal length of a lens. Derive the expression equivalent focal length of combination of two thin convex lenses in contact. (U) 7. Which phenomenon is responsible the formation of rainbow? 6. Define focal length of a lens. Derive the expression equivalent focal length of combination of two thin convex lenses in contact. (U) 7. Which phenomenon is responsible the formation of rainbow?](https://toppr-doubts-media.s3.amazonaws.com/images/8378448/62f7a409-d2fd-4a84-9a9e-ad660e282af4.jpg)