After buying Takumar 55mm f/1.8 lens years in the past, I began constructing my assortment of classic lenses, and since I don’t like spending some huge cash on them, I grew to become a frequent customer of thrift shops, flea markets, and on-line public sale websites.
The issues I’m bumping into are sometimes in varied states of decay, so I’m additionally studying the way to restore and repair lenses when there’s restricted entry to spare elements or they’re dearer than the lens itself. This text is a results of one such restore (beauty on this case).
I only in the near past bought the dirt-cheap Cosinon 50mm f/1.7 lens (proven above). The lens works flawlessly, however the rubber ring was unfastened after I bought it.
I believe quite a lot of you already know the above sight all too effectively as a result of it’s an issue that actually each lens with this sort of ring meets ultimately: with time, the rubber stretches, will get unfastened, and generally turns gray-white on account of micro-cracks and dust. Typically it loses its energy and splits in two or just falls off.
There are tutorials on the Internet about fixing the stretched rubber rings, you can put into two teams:
1. Attempt making use of warmth: put the ring in boiling water or use a warmth gun/hairdryer. The warmth ought to make the rubber shrink a bit (tried it, didn’t work).
2. Lower it and use some glue. (I assumed I’d move on this as a result of perhaps there’s some technique of refreshing the rubber that I merely am unaware of).
After my makes an attempt at boiling the rubber failed, I assumed that it’s value attempting and making a brand new ring. I do know I should buy one thing comparable (silicon rubber, geared cine ring, adjustable one, and so on.) however I’m fairly impatient and likewise the thought of paying double the worth of the lens for an element that will or could not match correctly is senseless to me. So, I appeared round the home and located a bit of leather-based from an outdated shoe. Turned out a bit thicker than the rubber is nevertheless it’s not a problem for me.
First, reduce a strip that’s the identical width because the rubber:
Subsequent, fastidiously reduce it to size. If you need it to sit down as tight on the lens as potential, reduce it 1 mm shorter. The leather-based can stretch a bit, so that you’ll have the ability to put it on the lens with none drawback.
Both glue it like this (I don’t know what sort of glue to make use of, although) or get a needle and powerful thread and stitch it.
It’s greatest to make holes first (takes a little bit of drive to push the needle by means of) and put the thread by means of them later. The kind of the seam and the colour of the thread is as much as you.
In case you have the talents or know somebody who works with leather-based, you possibly can simply obtain a greater end result. For instance, you can also make the stitches flat, stamp a sample for higher grip, spherical the sides, make some embroidery (e.g. your identify), and so on.
There’s a approach of constructing a seamless, steady ring, however the course of is time-consuming, requires a type of some type, and your fingers could damage a bit (do a seek for “moist molding leather-based”).
Issues to Contemplate
- I don’t learn about its sturdiness. From my earlier experiences with leather-based, this may in all probability last more than the lens itself however I might be improper.
- It wants conditioning infrequently or it’ll begin cracking.
- Leather-based doesn’t like being moist. Lenses neither, so let’s skip this level.
- Don’t use your customary, cotton thread. It is going to be destroyed by chemical substances which can be current within the leather-based. Use nylon or polyester (or kevlar for those who want one thing bulletproof).
- You’re not restricted to leather-based. I simply considered nylon cable braid, skinny paracord, and even copper, stainless, or brass wire.
I hope this text was useful to a few of you who’re additionally coping with unfastened rubber rings on lenses!
Concerning the writer: Marek B. is an newbie photographer with quite a lot of unusual concepts and a love for classic lenses. The opinions expressed on this article are solely these of the writer. This text was additionally revealed right here.