It is good to be able to feel safe purchasing on-line. Thanks again Ruth

Ruth Martindale

easycover, camera, cover, case, skin, silicone, dslr, camouflage, camo, body, protection

Which size F-Ring will be the best fit on my lens?


Each F-Ring can be adjusted to fit different lens diameters. The range of adjustment is quite small, so you need to choose the optimum sized F-Ring that will fit snugly onto your lens. To do this you need to measure the diameter of your lens at the point where you plan to fit the F-Ring – normally this is the focus ring, but it could also be the zoom ring.

The procedure described below shows a simple and effective way to measure your lens diameter.

First cut a thin strip of paper from a sheet of A4.

 

Now wrap this strip around the lens at the point where you will install the F-Ring.


Mark the point where the paper strip overlaps.


You now have a measurement of the circumference of your lens. So read this off using a rule.

In this instance the circumference measures 242mm.

Now divide the circumference by 3.14 (π) to find the diameter. In this case 242/3.14 = 77. So a 77mm F-Ring is required, which would be part number FS613G -  F-Ring for 74-78mm.

 

sensor, cleaning, camera, dslr, dust, patrol, video, help, guide, tutorial
newsletter, offers, camera, clean, just, limited
dust patrol, sensor cleaning, camera, clean, swabs
grip, uno, hand, carry, camera, holster