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Author Topic: Sharpness, sometimes a disadvantage  (Read 1793 times)

RSL

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Re: Sharpness, sometimes a disadvantage
« Reply #40 on: April 04, 2019, 09:27:33 am »

I have cataracts in both eyes, and am awaiting attention from the medical world. I had elevated pressure in both for several years, and drops have apparently reduced that to normal. There are days, no, moments within days, when I believe that without those damn veils that exist, I would no longer need glasses for distances. None of the effects that I experience seem to be constants, each varies a bit from hour to hoiur. I used to need reading specs from the age of 44, but had good distance sight; I now have no need for glasses for reading, and it's the distance view that's bad. Oddly, driving in lower light seems better than in bright, which may mean that glare affects cataracts more (one way of knowing you have 'em!) than does low light or, perhaps, a wide open pupil works better than the stopped down one in sunlight - more diffraction problems?

Rob, whatever you do, don't let them do both cataracts at once. I had a good friend who was an ophthalmologist. He was very emphatic about not doing two cataracts in the same operation. There's always a chance of failure for various reasons. I was lucky. My next-door neighbor wasn't so lucky. He lost his vision in one eye when the doc failed to catch a subsequent infection.

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Af certainly helps find focus using dslr screens which are not as helpful as were slr screens. With today's facilities for setting exactly the right diopter in your viewfinder, a split-image screen would be even more useful than it was on film camers where the option was usually another, separate diopter lens to choose, and how did you do that if not able to try 'em out in a shop?

But the newer mirrorless cameras have tremendously improved EVFs. My Pen-F viewer is as clear as my Leica viewers were -- and, if anything, brighter.

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In the end, however  focus, I still feel that psychologically, and that matters, looking into a 6x6 camera's reflex screen was the best viewing experience I ever had: large enough to see more clearly what was actually in shot, yet small enough to allow an impression of overall shape.

Rob

It's been a long time since I looked into my Rollei viewer and even longer since I looked into my Ikoflex, but I tend to agree it was good stuff.

Eric Myrvaagnes

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Re: Sharpness, sometimes a disadvantage
« Reply #41 on: April 04, 2019, 09:36:41 am »

A couple of years ago I had sudden case of CRVO ("Central Retina Vein Occlusion") in my left (non-dominant) eye, which has permanently damaged the retina, but only right in the middle, so I can't see clearly anything in that eye except by looking a little to the side. An injection in that eye every three months improves vision enough so that the left eye at least is able to assist the better right eye with stereo vision.

In addition, I had cataracts removed from both eyes about a year ago, so now I have good distant vision in the right eye, but need reading glasses to read anything in normal size type. Previously I had worn trifocals for many years.

P.S. My cataract operations were about a month apart, and they worked nicely.

And, the good right eye gets a daily eyedrop to keep the pressure normal.

At least I only need one good eye to do photography.   :'(
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KLaban

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Re: Sharpness, sometimes a disadvantage
« Reply #42 on: April 04, 2019, 02:27:54 pm »

Rob, Eric, serious eyesight problems for any visual artist are a nightmare scenario. Here's hoping you both manage to keep your eye to the viewfinder for many years to come.

 :)
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Eric Myrvaagnes

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Re: Sharpness, sometimes a disadvantage
« Reply #43 on: April 04, 2019, 05:44:56 pm »

Thank you, Keith!
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