![]() Make sure they aren't too far out, or you can gouge the threads. A little outward pressure on the spanner arms while locking them in place helps. Make sure you get a spanner that fits the grooves correctly and is adjusted to the right Slips, it can save the front of the element. Use a marker to note the position of the rings before you start-just reassurance that youĬover up the front surface of the lens with some thick tape cut into a circle, if the spanner Focalpoint cron download#You can get both here, or just download the catalog: Yes, some sort of firm rubber block would work for the inscription ring and the proper John at Focal Point would be best for this job, but since you asked. Jump into this? Any suggestions, info, pointers are welcome. Is that all? Or is there anything else I should be aware of before I I guess I'll have to use a rubber pad of some kind (like theįurniture leg protectors/caps) to unscrew the label/inscription ring,Īnd then a spanner wrench to unscrew the front element retaining ring. Focalpoint cron how to#In short, I'd appreaciate any pointers on how to cautiosly approach Week or more to get it back in pieces, and repeating the procedure Rather do that myself than sending it to a repair shop and waiting a To conclude, I guess I'll have to remove the front element - I'd Of the recommended service persons mentioned here. Shouldn't beĮxpensive - in any case, much less than sending the lens abroad to one On eyeglasses (polishing, etc.) - I even thought I'd ask aboutĪpplying an AR coating layer - we'll see about that yet. There's a good optician where I live, and they regularly do such jobs Will be mandatory - as it already is - but now it doesn't help much :-( Improve its performance as regards flaring. Removing the remaining (milky) coating and repolishing the lens would Purely for indoor use with controlled lighting, I thought that So, instead of reserving this lens (which I otherwise got cheaply) It's definitely not fungus, but the front element coating. When viewed under certain angle, the damage looks like e.g. The damage is definitely the front coating, with many fine cleaning The flare when used outdoors when the frame includes any larger whiteĪrea (sky, reflective surfaces, etc.) is unacceptable. When used *very* cautiously, it yields nice results. I have an older collapsible Summicron M 50/2 with bad coating on frontĮlement. ![]()
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