Difference Between Step Up & Step Downwards Rings
Filter threads are magic numbers. These are ones that matches a lens with its perfect filter partner. Miss it and a filter won’t match with the lens and you lot will have no style to use information technology. Correct? Wrong. Introducing pace-up/down rings. These are even more than interesting than the little lens wrenches that for a few dollars can save you lot thousands of dollars worth of blushes.
And so what practise they practice? Let’s say you have the pop NIKKOR 50mm f/1.iv lens. The filter thread specifications reads 52m. That’s okay but y’all have a problem. You’re out in the field and you don’t have a 52mm neutral density filter with y’all. What y’all practise accept is a filter for the larger Nikkor 17-35mm f/2.8D IF-ED which has a thread specification of 77mm. Luckily y’all as well have a Tiffen 52-77mm Pace-up ring. You simply screw in the step up band to the front end of the lens and Voila! Now you can screw in the 72mm ND filter on top of information technology. The step-up ring just increased the lens diameter and allowed you to attach a filter of a larger specification. So that you lot dont have to purchase or behave multiple filters for all the lenses you take. Saves money & bulk.
Step-up rings can be stacked upwards one on acme of the other to accommodate for larger filters on a comparatively smaller thread diameter. Say ane needs a 25-52mm step-upwardly ring. That is very difficult to obtain. However two step-up rings, one 25-37mm and the other from 37-52mm can be easily obtained. They can be stacked on top of each other and then a filter of 52mm can be screwed on top. However it is never advisable to stack too many step-up rings because filters are ideally needed to be as close to lens elements as possible for all-time results. Another reason going confronting the use of multiple step-up or stride-downward rings is image deposition. Most users who use multiple rings stacked on top of each other advise that they have image degradation of some sort.
Step-downwards rings do the exact opposite of a step-up band. They adjust a larger lens thread to accommodate a smaller filter. There are usually used to mountain accessories. When using footstep-down rings and filters, one can detect a lot of vignetting. Basically the corners are getting less light because of the tunnel that is created. Mounting and united nations-mounting multiple rings can be a hassle likewise. When yous’re unscrewing one, the ones in the middle may kickoff to motion too making information technology hard to get them off the lens.
A few things about a pace-up band
Footstep-up rings are mentioned as a combination of numbers. In the above example we mentioned 52-77mm. The first number denotes the filter thread specification of the lens on which the step-up ring is to be used. The second number denotes the filter diameter specification that will exist screwed on to the wider end of the ring.
When buying step-upwards or down filters always insist on ownership the thinnest ones. These are amend in terms of retaining the optical quality of the images. The farther the lens is away from the filter the more than image quality deposition you lot’re going to find.